HOW TO USE THIS MANUAL

IN00U–36

N17080

Filler Cap

Float

Reservoir

Grommet

Clip

Slotted Spring Pin

: Specified torque

Non–reusable part

Cylinder

PistonPush Rod

WasherSnap Ring

Boot

Gasket

Lock Nut

Clevis Pin

Clevis

N·m (kgf·cm, ft·lbf)

12 (120, 9)

15 (155, 11)

–INTRODUCTION HOW TO USE THIS MANUALIN–1

1Author: Date:

2000 MR2 (RM760U)

HOW TO USE THIS MANUALGENERAL INFORMATION1. INDEXAn INDEX is provided on the first page of each section to guide you to the item to be repaired. To assist youin finding your way through the manual, the section title and major heading are given at the top of every page.2. PRECAUTIONAt the beginning of each section, a PRECAUTION is given that pertains to all repair operations containedin that section.Read these precautions before starting any repair task.3. TROUBLESHOOTINGTROUBLESHOOTING tables are included for each system to help you diagnose the problem and find thecause. The fundamentals of how to proceed with troubleshooting are described on page IN–18.Be sure to read this before performing troubleshooting.4. PREPARATIONPreparation lists the SST (Special Service Tools), recommended tools, equipment, lubricant and SSM (Spe-cial Service Materials) which should be prepared before beginning the operation and explains the purposeof each one.5. REPAIR PROCEDURESMost repair operations begin with an overview illustration. It identifies the components and shows how theparts fit together.Example:

Illustration:what to do and where

21. CHECK PISTON STROKE OF OVERDRIVE BRAKE

(a)

Task heading : what to do

SST 09350–30020 (09350–06120)

Set part No. Component part No.Detailed text : how to do task

(b)

Piston stroke: 1.40 1.70 mm (0.0551 0.0669 in.)

Specification

Place SST and a dial indicator onto the overdrive brake pis-ton as shown in the illustration.

Measure the stroke applying and releasing the compressedair (392 785 kPa, 4 8 kgf/cm2 or 57 114 psi) as shownin the illustration.

IN–2–INTRODUCTION HOW TO USE THIS MANUAL

2Author: Date:

2000 MR2 (RM760U)

The procedures are presented in a step–by–step format: The illustration shows what to do and where to do it. The task heading tells what to do. The detailed text tells how to perform the task and gives other information such as specifications

and warnings.Example:

This format provides the experienced technician with a FAST TRACK to the information needed. The uppercase task heading can be read at a glance when necessary, and the text below it provides detailed informa-tion. Important specifications and warnings always stand out in bold type.6. REFERENCESReferences have been kept to a minimum. However, when they are required you are given the page to referto.7. SPECIFICATIONSSpecifications are presented in bold type throughout the text where needed. You never have to leave theprocedure to look up your specifications. They are also found in Service Specifications section for quick ref-erence.8. CAUTIONS, NOTICES, HINTS: CAUTIONS are presented in bold type, and indicate there is a possibility of injury to you or other

people. NOTICES are also presented in bold type, and indicate the possibility of damage to the components

being repaired. HINTS are separated from the text but do not appear in bold. They provide additional information to

help you perform the repair efficiently.9. SI UNITThe UNITS given in this manual are primarily expressed according to the SI UNIT (International System ofUnit), and alternately expressed in the metric system and in the English System.Example:

Torque: 30 N·m (310 kgf·cm, 22 ft·lbf)

IN0CN–12

B11009

BA

B02924 B10732

–INTRODUCTION IDENTIFICATION INFORMATIONIN–3

3Author: Date:

2000 MR2 (RM760U)

IDENTIFICATION INFORMATIONVEHICLE IDENTIFICATION ANDENGINE SERIAL NUMBER

1. VEHICLE IDENTIFICATION NUMBERThe vehicle identification number is stamped on the vehicleidentification number plate and the certification label, as shownin the illustration.

A: Vehicle Identification Number PlateB: Certification Label

2. ENGINE SERIAL NUMBERThe engine serial number is stamped on the engine block, asshown in the illustration.

IN0CO–12

FI1066

Z11554

Seal Lock Adhesive

IN–4–INTRODUCTION REPAIR INSTRUCTIONS

4Author: Date:

2000 MR2 (RM760U)

REPAIR INSTRUCTIONSGENERAL INFORMATIONBASIC REPAIR HINT(a) Use fender, seat and floor covers to keep the vehicle

clean and prevent damage.(b) During disassembly, keep parts in the appropriate order

to facilitate reassembly.

(c) Installation and removal of battery terminal:(1) Before performing electrical work, disconnect the

negative (–) terminal cable from the battery.(2) If it is necessary to disconnect the battery for in-

spection or repair, first disconnect the negative (–)terminal cable.

(3) When disconnecting the terminal cable, to preventdamage to battery terminal, loosen the cable nutand raise the cable straight up without twisting orprying it.

(4) Clean the battery terminals and cable ends with aclean shop rag. Do not scrape them with a file or oth-er abrasive objects.

(5) Install the cable ends to the battery terminals afterloosening the nut, and tighten the nut after installa-tion. Do not use a hammer to tap the cable endsonto the terminals.

(6) Be sure the cover for the positive (+) terminal isproperly in place.

(d) Check hose and wiring connectors to make sure that theyare connected securely and correctly.

(e) Non–reusable parts(1) Always replace cotter pins, gaskets, O–rings, oil

seals, etc. with new ones.(2) Non–reusable parts are indicated in the component

illustrations by the ”” symbol.

(f) Precoated partsPrecoated parts are bolts, nuts, etc. that are coated witha seal lock adhesive at the factory.(1) If a precoated part is retightened, loosened or

caused to move in any way, it must be recoated withthe specified adhesive.

(2) When reusing precoated parts, clean off the oldadhesive and dry with compressed air. Then applythe specified seal lock adhesive to the bolt, nut orthreads.

BE1367

Medium Current Fuse and High Current FuseEqual Amperage Rating

V00076

AbbreviationPart NameSymbolIllustration

FUSE

MEDIUM CURRENT FUSE

HIGH CURRENT FUSE

FUSIBLE LINK

CIRCUIT BREAKER

FUSE

M–FUSE

H–FUSE

FL

CB

–INTRODUCTION REPAIR INSTRUCTIONSIN–5

5Author: Date:

2000 MR2 (RM760U)

(3) Precoated parts are indicated in the component il-lustrations by the ”” symbol.

(g) When necessary, use a sealer on gaskets to preventleaks.

(h) Carefully observe all specifications for bolt tighteningtorques. Always use a torque wrench.

(i) Use of special service tools (SST) and special service ma-terials (SSM) may be required, depending on the natureof the repair. Be sure to use SST and SSM where speci-fied and follow the proper work procedure. A list of SSTand SSM can be found in Preparation section in thismanual.

(j) When replacing fuses, be sure the new fuse has the cor-rect amperage rating. DO NOT exceed the rating or useone with a lower rating.

IN0253

WRONG CORRECT

IN0252

WRONG CORRECT


6Author: Date:

2000 MR2 (RM760U)

(k) Care must be taken when jacking up and supporting thevehicle. Be sure to lift and support the vehicle at the prop-er locations (See page IN–8). Cancel the parking brake on the level place and

shift the transmission in Neutral (or N position). When jacking up the front wheels of the vehicle at

first place stoppers behind the rear wheels. When jacking up the rear wheels of the vehicle at

first place stoppers before the front wheels. When either the front or rear wheels only should be

jacked up, set rigid racks and place stoppers in frontand behind the other wheels on the ground.

After the vehicle is jacked up, be sure to support iton rigid racks . It is extremely dangerous to do anywork on a vehicle raised on a jack alone, even fora small job that can be finished quickly.

(l) Observe the following precautions to avoid damage to thefollowing parts:(1) Do not open the cover or case of the ECU unless

absolutely necessary. (If the IC terminals aretouched, the IC may be destroyed by static electric-ity.)

(2) To disconnect vacuum hoses, pull off the end, notthe middle of the hose.

(3) To pull apart electrical connectors, pull on the con-nector itself, not the wires.

(4) Be careful not to drop electrical components, suchas sensors or relays. If they are dropped on a hardfloor, they should be replaced and not reused.

(5) When steam cleaning an engine, protect the elec-tronic components, air filter and emission–relatedcomponents from water.

(6) Never use an impact wrench to remove or installtemperature switches or temperature sensors.

IN0002

Example


7Author: Date:

2000 MR2 (RM760U)

(7) When checking continuity at the wire connector, in-sert the tester probe carefully to prevent terminalsfrom bending.

(8) When using a vacuum gauge, never force the hoseonto a connector that is too large. Use a step–downadapter for adjustment. Once the hose has beenstretched, it may leak air.

(m) Installation and removal of vacuum hose:(1) When disconnecting vacuum hoses, use tags to

identify how they should be reconnected to.(2) After completing a job, double check that the vacu-

um hoses are properly connected. A label under thehood shows the proper layout.

(n) Unless otherwise stated, all resistance is measured at anambient temperature of 20°C (68°F). Because the resis-tance may be outside specifications if measured at hightemperatures immediately after the vehicle has been run-ning, measurement should be made when the engine hascooled down.

IN0CP–11

B02925

B10678

B10677

B10680

Front

JACK POSITIONFrontRearCAUTION:

PANTOGRAPH JACK POSITION

SUPPORT POSITIONSafety stand and swing arm type lift

Front crossmemberRear axle beam

When jacking–up the front and rear, make sure the car is notcarrying any extra weight.


8Author: Date:

2000 MR2 (RM760U)

VEHICLE LIFT AND SUPPORT LOCATIONS

B11105

B10679

B10681

PLATE TYPE LIFT

L

B

A

AttachmentC

Left and right set position

Front and rear set position

Place the vehicle over the center of the lift.

Align the attachment upper end (B) with the rearjack supporting point (L).

Attachment dimensions

85 mm (3.35 in.)

100 mm (3.94 in.)

70 mm (2.76 in.)

200 mm (7.87 in.)

R

Align the cushion gum ends of the plate with theattachment lower ends (A, C).

NOTICE: Do not support position ”R” at the rearside with the attachment. Also, placingthe attachment at position ”R” maycause deformation of the fender.

HINT:


9Author: Date:

2000 MR2 (RM760U)

IN0GH–01

BO4111

Negative Cable

IN–10–INTRODUCTION FOR ALL OF VEHICLES

10Author: Date:

2000 MR2 (RM760U)

FOR ALL OF VEHICLESPRECAUTION1. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND

SEAT BELT PRETENSIONER(a) The MR2 is equipped with an SRS (Supplemental Re-

straint System), such as the driver airbag, front passen-ger airbag assembly and seat belt pretensioner.Failure to carry out service operations in the correct se-quence could cause the supplemental restraint system tounexpectedly deploy during servicing, possibly leading toa serious accident.Further, if a mistake is made in servicing the supplementalrestraint system, it is possible the SRS may fail to operatewhen required. Before servicing (including removal orinstallation of parts, inspection or replacement), be sureto read the following items carefully, then follow the cor-rect procedure described in this manual.

(b) GENERAL NOTICE(1) Malfunction symptoms of the supplemental re-

straint system are difficult to confirm, so the diag-nostic trouble codes become the most importantsource of information when troubleshooting. Whentroubleshooting the supplemental restraint system,always inspect the diagnostic trouble codes beforedisconnecting the battery (See page DI–237).

(2) Work must be started after 90 seconds from thetime the ignition switch is turned to the ”LOCK” posi-tion and the negative (–) terminal cable is discon-nected from the battery.(The supplemental restraint system is equippedwith a back–up power source so that if work isstarted within 90 seconds of disconnecting the neg-ative (–) terminal cable from the battery, the SRSmay deploy.)When the negative (–) terminal cable is discon-nected from the battery, memory of the clock andaudio systems will be cancelled. So before startingwork, make a record of the contents memorized bythe each memory system. Then when work is fin-ished, reset the clock and audio systems as before.To avoid erasing the memory of each memory sys-tem, never use a back–up power supply from anoth-er battery.

F08843

Marks

–INTRODUCTION FOR ALL OF VEHICLESIN–11

11Author: Date:

2000 MR2 (RM760U)

(3) Even in cases of a minor collision where the SRSdoes not deploy, the steering wheel pad (See pageRS–13), front passenger airbag assembly (Seepage RS–28) and seat belt pretensioner (See pageBO–61) should be inspected.

(4) Never use SRS parts from another vehicle. Whenreplacing parts, replace them with new parts.

(5) Before repairs, remove the airbag sensor if shocksare likely to be applied to the sensor during repairs.

(6) Never disassemble and repair the airbag sensor as-sembly, steering wheel pad, front passenger airbagassembly or seat belt pretensioner.

(7) If the airbag sensor assembly, steering wheel pad,front passenger airbag assembly or seat belt pre-tensioner has been dropped, or if there are cracks,dents or other defects in the case, bracket or con-nector, replace them with new ones.

(8) Do not directly expose the airbag sensor assembly,steering wheel pad, front passenger airbag assem-bly or seat belt pretensioner to hot air or flames.

(9) Use a volt/ohmmeter with high impedance (10 kΩ/Vminimum) for troubleshooting of the electrical cir-cuit.

(10) Information labels are attached to the periphery ofthe SRS components. Follow the instructions on thenotices.

(11) After work on the supplemental restraint system iscompleted, check the SRS warning light (See pageDI–237).

(c) SPIRAL CABLE (in Combination Switch)The steering wheel must be fitted correctly to the steeringcolumn with the spiral cable at the neutral position, other-wise cable disconnection and other troubles may result.Refer to SR–19 of this manual concerning correct steer-ing wheel installation.

B02920H13961 B11243

Example:

CORRECT WRONG

Z13950

Example:


12Author: Date:

2000 MR2 (RM760U)

(d) STEERING WHEEL PAD (with Airbag)(1) When removing the steering wheel pad or handling

a new steering wheel pad, it should be placed withthe pad top surface facing up.Storing the pad with its metallic surface facing up-ward may lead to a serious accident if the airbag de-ploys for some reason. In addition do not store asteering wheel pad on top of another one.

(2) Never measure the resistance of the airbag squib.(This may cause the airbag to deploy, which is verydangerous.)

(3) Grease should not be applied to the steering wheelpad and the pad should not be cleaned with deter-gents of any kind.

(4) Store the steering wheel pad where the ambienttemperature remains below 93°C (200°F), withouthigh humidity and away from electrical noise.

(5) When using electric welding, first disconnect the air-bag connector (yellow color and 2 pins) under thesteering column near the combination switch con-nector before starting work.

(6) When disposing of a vehicle or the steering wheelpad alone, the airbag should be deployed using anSST before disposal (See page RS–15).Carry out the operation in a safe place away fromelectrical noise.

H12067 B11012 B11013

Example:

CORRECT WRONG

Z13951

Example:


13Author: Date:

2000 MR2 (RM760U)

(e) FRONT PASSENGER AIRBAG ASSEMBLY(1) Always store a removed or new front passenger air-

bag assembly with the airbag deployment directionfacing up.Storing the airbag assembly with the airbag deploy-ment direction facing down could cause a seriousaccident if the airbag inflates.

(2) Never measure the resistance of the airbag squib.(This may cause the airbag to deploy, which is verydangerous.)

(3) Grease should not be applied to the front passen-ger airbag assembly and the airbag door should notbe cleaned with detergents of any kind.

(4) Store the airbag assembly where the ambient tem-perature remains below 93°C (200°F), without highhumidity and away from electrical noise.

(5) When using electric welding, first disconnect the air-bag connector (yellow color and 2 pins) installed onthe assembly before starting work.

(6) When disposing of a vehicle or the airbag assemblyalone, the airbag should be deployed using an SSTbefore disposal (See page RS–30).Perform the operation in a safe place away fromelectrical noise.

B02121

Example:


14Author: Date:

2000 MR2 (RM760U)

(f) SEAT BELT PRETENSIONER(1) Never measure the resistance of the seat belt pre-

tensioner. (This may cause the seat belt pretension-er to activate, which is very dangerous.)

(2) Never disassemble the seat belt pretensioner.(3) Never install the seat belt pretensioner in another

vehicle.(4) Store the seat belt pretensioner where the ambient

temperature remains below 80°C (176°F) andaway from electrical noise without high humidity.

(5) When using electric welding, first disconnect theconnector (yellow color and 2 pins) before startingwork.

(6) When disposing of a vehicle or the seat belt preten-sioner alone, the seat belt pretensioner should beactivated before disposal (See page BO–62). Per-form the operation in a safe place away from electri-cal noise.

(7) The seat belt pretensioner is hot after activation, solet it cool down sufficiently before the disposal.However never apply water to the seat belt preten-sioner.


15Author: Date:

2000 MR2 (RM760U)

(g) AIRBAG SENSOR ASSEMBLY(1) Never reuse the airbag sensor assembly involved

in a collision when the SRS has deployed.(2) The connectors to the airbag sensor assembly

should be connected or disconnected with the sen-sor mounted on the floor. If the connectors are con-nected or disconnected while the airbag sensor as-sembly is not mounted to the floor, it could causeundesired ignition of the supplemental restraint sys-tem.

(3) Work must be started after 90 seconds from thetime the ignition switch is turned to the ”LOCK” posi-tion and the negative (–) terminal cable is discon-nected from the battery, even if only loosing the setbolts of the airbag sensor assembly.

(h) WIRE HARNESS AND CONNECTORThe SRS wire harness is integrated with the instrumentpanel wire harness assembly. All the connectors in thesystem are a standard yellow color. If the SRS wire har-ness becomes disconnected or the connector becomesbroken due to an accident, etc., repair or replace it asshown on page RS–52.


16Author: Date:

2000 MR2 (RM760U)

2. FOR VEHICLES EQUIPPED WITH A CATALYTIC CONVERTERCAUTION:If large amount of unburned gasoline flows into the converter, it may overheat and create a fire haz-ard. To prevent this, observe the following precautions and explain them to your customer.(a) Use only unleaded gasoline.(b) Avoid prolonged idling.

Avoid running the engine at idle speed for more than 20 minutes.(c) Avoid spark jump test.

(1) Perform spark jump test only when absolutely necessary. Perform this test as rapidly as possible.(2) While testing, never race the engine.

(d) Avoid prolonged engine compression measurement.Engine compression tests must be done as rapidly as possible.

(e) Do not run engine when fuel tank is nearly empty.This may cause the engine to misfire and create an extra load on the converter.

(f) Avoid coasting with ignition turned off.(g) Do not dispose of used catalyst along with parts contaminated with gasoline or oil.

3. IF VEHICLE IS EQUIPPED WITH MOBILE COMMUNICATION SYSTEMFor vehicles with mobile communication systems such as two–way radios and cellular telephones, observethe following precautions.

(1) Install the antenna as far as possible away from the ECU and sensors of the vehicle’s electronicsystem.

(2) Install the antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the ve-hicle’s electronic systems. For details about ECU and sensors locations, refer to the section onthe applicable component.

(3) Avoid winding the antenna feeder together with other wiring as much as possible, and also avoidrunning the antenna feeder parallel with other wire harnesses.

(4) Check that the antenna and feeder are correctly adjusted.(5) Do not install powerful mobile communications system.

4. FOR USING OBD II SCAN TOOL OR TOYOTA HAND–HELD TESTERCAUTION:Observe the following items for safety reasons: Before using the OBD II scan tool or TOYOTA hand–held tester, the OBD II scan tool’s instruc-

tion book or TOYOTA hand–held tester’s operator manual should be read thoroughly. Be sure to route all cables securely when driving with the OBD II scan tool or TOYOTA hand–

held tester connected to the vehicle. (i.e. Keep cables away from feet, pedals, steering wheeland shift lever.)

Two persons are required when test driving with the OBD II scan tool or TOYOTA hand–heldtester, one person to drive the vehicle and the other person to operate the OBD II scan tool orTOYOTA hand–held tester.

IN05Y–21

–INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS

IN–17

17Author: Date:

2000 MR2 (RM760U)

HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMSGENERAL INFORMATIONA large number of ECU controlled systems are used in the MR2. In general, the ECU controlled system isconsidered to be a very intricate system requiring a high level of technical knowledge and expert skill to trou-bleshoot. However, the fact is that if you proceed to inspect the circuits one by one, troubleshooting of thesesystems is not complex. If you have adequate understanding of the system and a basic knowledge of elec-tricity, accurate diagnosis and necessary repair can be performed to locate and fix the problem. This manualis designed through emphasis of the above standpoint to help service technicians perform accurate and ef-fective troubleshooting, and is compiled for the following major ECU controlled systems:The troubleshooting procedure and how to make use of it are described on the following pages.

System Page

1. Engine DI–1

2. Anti–Lock Brake System DI–152

3. Electro–Hiydraulic Power Steering DI–200

4. Supplemental Restraint System DI–235

5. Engine Immobiliser System DI–335

6. Body Control System DI–354

FOR USING OBD II SCAN TOOL OR TOYOTA HAND–HELD TESTER Before using the scan tool or tester, the scan tool’s instruction book or tester’s operator manual should

be read thoroughly. If the scan tool or tester cannot communicate with ECU controlled systems when you have connected

the cable of the scan tool or tester to DLC3, turned the ignition switch ON and operated the scan tool,there is a problem on the vehicle side or tool side.(1) If communication is normal when the tool is connected to another vehicle, inspect the diagnosis

data link line (Busline) or ECU power circuit of the vehicle.(2) If communication is still not possible when the tool is connected to another vehicle, the problem

is probably in the tool itself, so perform the Self Test procedures outline in the Tester Operator’sManual.

IN05W–23

Vehicle Brought to Workshop

Customer ProblemAnalysis

Symptom Confirmationand Diagnostic TroubleCode Check

Symptom Simulation

Diagnostic Trouble Code Chart

Problem Symptoms Table

Circuit Inspection or PartsInspection

Repair

Confirmation Test

End

1

2

4

3

5

6

7

8

Ask the customer about the conditions and theenvironment when the problem occurred.

1

Confirm the symptoms and the problem conditions,and check the diagnostic trouble codes.(When the problem symptoms do not appear during confirmation, use the symptom simulationmethod described later on.)

2, 3

Check the results obtained in Step 2, then confirm the inspection procedure for the system or the partwhich should be checked using the diagnostictrouble code chart or the problem symptoms table.

4, 5, 6

Check and repair the affected system or part in accordance with the instructions in Step 6.

7

After completing repairs, confirm that the problem has been eliminated.(If the problem is not reproduced, perform theconfirmation test under the same conditions andin the same environment as when it occurred forthe first time.)

8

IN–18 –INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS

18Author: Date:

2000 MR2 (RM760U)

HOW TO PROCEED WITH TROUBLESHOOTINGCarry out troubleshooting in accordance with the procedure on the following page. Here, only the basic pro-cedure is shown. Details are provided in Diagnostics section, showing the most effective methods for eachcircuit. Confirm the troubleshooting procedures first for the relevant circuit before beginning troubleshootingof that circuit.

Important Points in the Customer Problem Analysis

What ––––– Vehicle model, system name When ––––– Date, time, occurrence frequency Where ––––– Road conditions Under what conditions? ––––– Running conditions, driving conditions, weather conditions

How did it happen? ––––– Problem symptoms

(Sample) Engine control system check sheet.

ENGINE CONTROL SYSTEM Check Sheet

Customer’s Name

Driver’s Name

Data VehicleBrought in

License No.

Model and ModelYear

Frame No.

Engine Model

Odometer Readingkmmiles

Pro

blem

Sym

ptom

s

Engine doesnot Start

Difficult toStart

Poor Idling

PoorDrive ability

Engine Stall

Others

Engine does not crank No initial combustion No complete combustion

Engine cranks slowlyOther

Incorrect first idle Idling rpm is abnormal High ( rpm) Low ( rpm)Rough idling Other

Hesitation Back fire Muffler explosion (after–fire) SurgingKnocking Other

Soon after starting After accelerator pedal depressedAfter accelerator pedal released During A/C operationShifting from N to D Other

Data Problem

Constant Sometimes ( times per day/month)

Inspector’sName

CUSTOMER PROBLEM ANALYSIS CHECK


IN–19

19Author: Date:

2000 MR2 (RM760U)

1. CUSTOMER PROBLEM ANALYSISIn troubleshooting, the problem symptoms must be confirmed accurately and all preconceptions must becleared away in order to give an accurate judgment. To ascertain just what the problem symptoms are, it isextremely important to ask the customer about the problem and the conditions at the time it occurred.Important Point in the Problem Analysis:The following 5 items are important points in the problem analysis. Past problems which are thought to beunrelated and the repair history, etc. may also help in some cases, so as much information as possible shouldbe gathered and its relationship with the problem symptoms should be correctly ascertained for referencein troubleshooting. A customer problem analysis table is provided in Diagnostics section for each systemfor your use.

DIAGNOSTIC TROUBLE CODE CHECK PROCEDURE

Diagnostic Trouble Code Check (Make anote of and then clear)

Confirmationof Symptoms

Diagnostic TroubleCode Check

Problem Condition

Diagnostic Trouble Code Display

Problem symptomsexist

Same diagnostictrouble code isdisplayed

Problem is still occurring in the diagnosticcircuit

Normal code isdisplayed

The problem is still occurring in a placeother than in the diagnostic circuit(The diagnostic trouble code displayedfirst is either for a past problem or it is asecondary problem)

No problem symptoms exist

The problem occurred in the diagnosticcircuit in the past

Normal Code Display Problem symptomsexist

Normal code is displayed

The problem is still occurring in a placeother than in the diagnostic circuit

No problem symptoms exist

Normal code is displayed

The problem occurred in a place otherthan in the diagnostic circuit in the past


20Author: Date:

2000 MR2 (RM760U)

2. SYMPTOM CONFIRMATION AND DIAGNOSTIC TROUBLE CODE CHECKThe diagnostic system in the MR2 fulfills various functions. The first function is the Diagnostic Trouble CodeCheck in which a malfunction in the signal circuits to the ECU is stored in code in the ECU memory at thetime of occurrence, to be output by the technician during troubleshooting. Another function is the Input SignalCheck which checks if the signals from various switches are sent to the ECU correctly.By using these check functions, the problem areas can be narrowed down quickly and troubleshooting canbe performed effectively. Diagnostic functions are incorporated in the following systems in the MR2.

SystemDiagnostic Trouble

Code Check

Input Signal Check

(Sensor Check)

Diagnostic Test

Mode (Active Test)

1. Engine

(with Check Mode)

2. Anti–Lock Brake System

3. Electro–Hydraulic Power Steering

4. Supplemental Restraint System

5. Engine Immobiliser System

6. Body Control System

In diagnostic trouble code check, it is very important to determine whether the problem indicated by the diag-nostic trouble code is still occurring or occurred in the past but returned to normal at present. In addition,it must be checked in the problem symptom check whether the malfunction indicated by the diagnostictrouble code is directly related to the problem symptom or not. For this reason, the diagnostic trouble codesshould be checked before and after the symptom confirmation to determine the current conditions, as shownin the table below. If this is not done, it may, depending on the case, result in unnecessary troubleshootingfor normally operating systems, thus making it more difficult to locate the problem, or in repairs not pertinentto the problem. Therefore, always follow the procedure in correct order and perform the diagnostic troublecode check.

Diagnostic trouble code check

Making a note of and clearing of the diagnostic trouble codes displayed

Symptom confirmation

No problem symptomsexist

Problem symptoms exist

Simulation test using the symptom simulation methods

Normal code displayed Problem symptoms exist

Normal code displayed No problem symptoms exist

Diagnostic trouble code check

Troubleshooting of problem indicatedby diagnostic trouble code

Diagnostic trouble code displayed Problem symptoms exist

System NormalTroubleshooting of each problem symptom

If a diagnostic trouble code was displayed in the initial diagnostictrouble code check, it indicatesthat the trouble may have occurredin a wire harness or connector inthat circuit in the past. Therefore,check the wire harness and con-nectors (See page IN–28).


IN–21

21Author: Date:

2000 MR2 (RM760U)

Taking into account the points on the previous page, a flow chart showing how to proceed with troubleshoot-ing using the diagnostic trouble code check is shown below. This flow chart shows how to utilize the diagnos-tic trouble code check effectively, then by carefully checking the results, indicates how to proceed either todiagnostic trouble code troubleshooting or to troubleshooting of problem symptoms table.

V07268

VIBRATION METHOD: When vibration seems to be the major cause.

CONNECTORS

WIRE HARNESS

PARTS AND SENSOR

1

Slightly shake the connector vertically and horizontally.

Slightly shake the wire harness vertically and horizontally.The connector joint, fulcrum of the vibration, and bodythrough portion are the major areas to be checked thorough-ly.

Apply slight vibration with a finger to the part of the sensorconsidered to be the problem cause and check that the mal-function occurs.

Shake Slightly

Swing Slightly

Vibrate Slightly

HINT:Applying strong vibration to relays may result in open relays.


22Author: Date:

2000 MR2 (RM760U)

3. SYMPTOM SIMULATIONThe most difficult case in troubleshooting is when there are no problem symptoms occurring. In such cases,a thorough customer problem analysis must be carried out, then simulate the same or similar conditions andenvironment in which the problem occurred in the customer’s vehicle. No matter how much experience atechnician has, or how skilled he may be, if he proceeds to troubleshoot without confirming the problemsymptoms he will tend to overlook something important in the repair operation and make a wrong guesssomewhere, which will only lead to a standstill. For example, for a problem which only occurs when the en-gine is cold, or for a problem which occurs due to vibration caused by the road during driving, etc., the prob-lem can never be determined so long as the symptoms are confirmed with the engine hot condition or thevehicle at a standstill. Since vibration, heat or water penetration (moisture) is likely cause for problem whichis difficult to reproduce, the symptom simulation tests introduced here are effective measures in that the ex-ternal causes are applied to the vehicle in a stopped condition.Important Points in the Symptom Simulation Test:In the symptom simulation test, the problem symptoms should of course be confirmed, but the problem areaor parts must also be found out. To do this, narrow down the possible problem circuits according to the symp-toms before starting this test and connect a tester beforehand. After that, carry out the symptom simulationtest, judging whether the circuit being tested is defective or normal and also confirming the problem symp-toms at the same time. Refer to the problem symptoms table for each system to narrow down the possiblecauses of the symptom.

B02389

B02390

HEAT METHOD: When the problem seems to occur when the suspect area is heated.2

NOTICE:

3 WATER SPRINKLING METHOD:

(1)

(2)

4 OTHER: When a malfunction seems to occur when electrical load is excessive.

When the malfunction seems to occur on a rainy day or in ahigh–humidity condition.

Heat the component that is the likely cause of the malfunctionwith a hair dryer or similar object. Check to see if the malfunctionoccurs.

Sprinkle water onto the vehicle and check to see if the malfunc-tion occurs.

Turn on all electrical loads including the heater blower, headlights, rear window defogger, etc. and check to see if the mal-function occurs.

ON

HINT:If a vehicle is subject to water leakage, the leaked water maycontaminate the ECU. When testing a vehicle with a water leak-age problem, special caution must be taken.

M a l f u n c-tion

Do not heat to more than 60 °C (140°F). (Temperatureis limited not to damage the components.)Do not apply heat directly to parts in the ECU.

(1)

(2)

Never sprinkle water directly into the engine compart-ment, but indirectly change the temperature and hu-midity by applying water spray onto the radiator frontsurface.Never apply water directly onto the electronic compo-nents.

NOTICE:


IN–23

23Author: Date:

2000 MR2 (RM760U)

DTC No. Indicates the diagnostic trouble code. Page or Instructions Indicates the page where the inspection procedure for each circuit is to be found, or gives instructions for checking and repairs.

Detection Item Indicates the system of the problem or contents of the problem.

Trouble Area Indicates the suspect area of the problem.

Mass Air Flow Circuit Malfunction

Detection Item

Open or short in mass air flow meter circuit Mass air flow meter ECM

DTC No.(See page) Trouble Area MIL* Memory

P0100(DI–24)

P0101(DI–28)

P0115(DI–33)

Open or short in intake air temp. sensor circuit Intake air temp. sensor ECM

Intake Air Temp. Circuit Malfunction

P0110(DI–29)

Open or short in engine coolant temp. sensor circuit Engine coolant temp. sensor ECM

Throttle/ Pedal Position Sensor/Switch”A” Circuit Malfunction

Engine Coolant Temp. Circuit Malfunction

Open or short in throttle position sensor circuit Throttle position sensor ECM

HINT:Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument or otherfactors.

If a malfunction code is displayed during the DTC check mode, check the circuit for the code listed in the tablebelow. For details of each code, turn to the page referred to under the ”See page” for the respective ”DTC No.”in the DTC chart.

Mass Air Flow CircuitRange/ Performance Problem

Mass air flow meter

Throttle position sensorThrottle/ Pedal Position Sensor/ Switch”A” Circuit Range / Performance Prob-lem

P0116(DI–37)

Engine Coolant Temp. Circuit Range/ Performance Problem

Engine coolant temp. sensor Cooling system

SAE CONTROLLED

DIAGNOSTIC TROUBLE CODE CHART


24Author: Date:

2000 MR2 (RM760U)

4. DIAGNOSTIC TROUBLE CODE CHARTThe inspection procedure is shown in the table below. This table permits efficient and accurate troubleshoot-ing using the diagnostic trouble codes displayed in the diagnostic trouble code check. Proceed with trouble-shooting in accordance with the inspection procedure given in the diagnostic chart corresponding to thediagnostic trouble codes displayed. The engine diagnostic trouble code chart is shown below as an example.


IN–25

25Author: Date:

2000 MR2 (RM760U)

5. PROBLEM SYMPTOMS TABLEThe suspected circuits or parts for each problem symptom are shown in the table below. Use this table totroubleshoot the problem when a ”Normal” code is displayed in the diagnostic trouble code check but theproblem is still occurring. Numbers in the table indicate the inspection order in which the circuits or partsshould be checked.HINT:When the problem is not detected by the diagnostic system even though the problem symptom is present,it is considered that the problem is occurring outside the detection range of the diagnostic system, or thatthe problem is occurring in a system other than the diagnostic system.

Symptom Suspected Area See page

Engine does not crank (Does not start)

No initial combustion (Does not start)

No complete combustion (Does not start)

1. Starter and starter relay

1. ECM power source circuit2. Fuel pump control circuit3. ECM

1. Starter signal circuit2. Fuel pump control circuit

1. Fuel pump control circuit

DI–147DI–151IN–29

PROBLEM SYMPTOMS TABLE

1. Compression2. Fuel pump control circuit

1. A/C signal circuit2. Fuel pump control circuit

1. A/C signal circuit (Compressor circuit)2. ECM power source circuit

1. Starter signal circuit2. Fuel pump control circuit

1. Starter signal circuit2. Fuel pump control circuit3. Compression

idling)

High engine idle speed (Poor idling)

Hot engine

Cold engine (Difficult to start)

Engine cranks normally (Difficult to start)

AC–88

DI–144DI–151EM–3

DI–151

Problem Symptom

Page Indicates the page where the flow chart for each circuit is located.

Circuit Inspection, Inspection Order Indicates the circuit which needs to be checked for each problem symptom. Check in the order indicated by the numbers.

Circuit or Part Name Indicates the circuit or part which needs to be checked.

ST–2ST–17

DI–144DI–151

DI–144DI–151

V08423

Knock Sensor 1

GR

ECM

KNK

E1

12E6

WIRING DIAGRAM Wiring DiagramThis shows a wiring diagram of the circuit.Use this diagram together with ELECTRICALWIRING DIAGRAM to thoroughly understand thecircuit.Wire colors are indicated by an alphabetical code.B = Black, L = Blue, R = Red, BR = Brown,LG = Light Green, V = Violet, G = Green,O = Orange, W = White, GR = Gray, P = Pink,Y = Yellow, SB = Sky BlueThe first letter indicates the basic wire color andthe second letter indicates the color of the stripe.

DTC P0325 Knock Sensor 1 Circuit Malfunction

CIRCUIT DESCRIPTIONKnock sensor is fitted to the cylinder block to detect engine knocking. This sensor contains a piezoelectric element which

generates a voltage when it becomes deformed, which occurs when the cylinder block vibrates due to knocking. If engine

knocking occurs, ignition timing is retarded to suppress it.

DTC No. DTC Detection Condition Trouble Area

P0325No knock sensor 1 signal to ECM with engine speed,

1,200 rpm or more.

Open or short in knock sensor1 circuit

Knock sensor 1 (looseness)

ECM

If the ECM detects the above diagnosis conditions, it operates the fall safe function in which the corrective retard angle

value is set to the maximum value.

Diagnostic Trouble Code No. and Detection Item

Circuit Description The major role and operation, etc. of the circuit and its component parts are explained.

Indicates the diagnostic trouble code, diagnostic trouble code set parameter and suspect area of the problem.


26Author: Date:

2000 MR2 (RM760U)

6. CIRCUIT INSPECTIONHow to read and use each page is shown below.

V08425

LOCK

KNK

E6 Connector

(a) Remove the glove compartment (See page SF–68).(b) Disconnect the E6 connector from the ECM.

INSPECTION PROCEDURE

Replace knock sensor.

1 Check continuity between terminal KNK of ECM connector and body ground.

OK:

Check knock sensor (See page SF–61).

Measure the resistance between terminal KNK of the ECM connec-tor and body ground.

Resistance: 1 M Ω or higher

Connector being checked is connected.

Indicates the condition of the connector of ECU during the check.

PREPARATION:

CHECK:

2

Go to step 3.

OK

OK

NG

Indicates the position of the ignition switch during the check.

Check from the connector back side.(with harness)

Ignition Switch LOCK (OFF)

Ignition Switch START

LOCKIgnition Switch ON

Ignition Switch ACCSTART

ON

ACC

Indicates the place to check the voltage or resistance. Indicates the connector position to checked, from the front or back side.

Connector being checked is disconnected.

Check from the connector front side. (without harness)In this case, care must be taken not to bend the terminals.

E6 Connector

KNK

Wire Harness

E6 Connector

KNK

A00255AB0117A00265

Inspection ProcedureUse the inspection procedure to determine ifthe circuit is normal or abnormal, and, if it isabnormal, use it to determine whether theproblem is located in the sensors, actuators,wire harness or ECU.


IN–27

27Author: Date:

2000 MR2 (RM760U)

FI0048

FI0047

FI0046

IN05X–13


28Author: Date:

2000 MR2 (RM760U)

HOW TO USE THE DIAGNOSTICCHART AND INSPECTIONPROCEDURE1. CONNECTOR CONNECTION AND TERMINAL IN-

SPECTION For troubleshooting, diagnostic trouble code charts or

problem symptom table are provided for each circuit withdetailed inspection procedures on the following pages.

When all the component parts, wire harnesses and con-nectors of each circuit except the ECU are found to benormal in troubleshooting, then it is determined that theproblem is in the ECU. Accordingly, if diagnosis is per-formed without the problem symptoms occurring, refer toStep 8 to replace the ECU. So always confirm that theproblem symptoms are occurring, or proceed with inspec-tion while using the symptom simulation method.

The instructions ”Check wire harness and connector” and”Check and replace ECU” which appear in the inspectionprocedure, are common and applicable to all diagnostictrouble codes. Follow the procedure outlined belowwhenever these instructions appear.

OPEN CIRCUIT:This could be due to a disconnected wire harness, faulty con-tact in the connector, a connector terminal pulled out, etc.HINT: It is rarely the case that a wire is broken in the middle of

it. Most cases occur at the connector. In particular, care-fully check the connectors of sensors and actuators

Faulty contact could be due to rusting of the connectorterminals, to foreign materials entering terminals or a de-formation of connector terminals. Simply disconnectingand reconnecting the connectors once changes thecondition of the connection and may result in a return tonormal operation. Therefore, in troubleshooting, if no ab-normality is found in the wire harness and connectorcheck, but the problem disappears after the check, thenthe cause is considered to be in the wire harness or con-nectors.

SHORT CIRCUIT:This could be due to a contact between wire harness and thebody ground or to a short circuit occurred inside the switch, etc.HINT:When there is a short circuit between the wire harness and bodyground, check thoroughly whether the wire harness is caughtin the body or is clamped properly.

FI7187

IN0379

Sensor SideECU Side

IN0378

Sensor Side

ECU Side

IN0380

Sensor Side

ECU Side

IN0381

Pull Lightly

Looseness of Crimping


IN–29

29Author: Date:

2000 MR2 (RM760U)

2. CONNECTOR HANDLINGWhen inserting tester probes into a connector, insert them fromthe rear of the connector. When necessary, use mini test leads.For water resistant connectors which cannot be accessed frombehind, take good care not to deform the connector terminals.

3. CONTINUITY CHECK (OPEN CIRCUIT CHECK)(a) Disconnect the connectors at both ECU and sensor

sides.

(b) Measure the resistance between the applicable terminalsof the connectors.Resistance: 1 Ω or less

HINT:Measure the resistance while lightly shaking the wire harnessvertically and horizontally.

4. RESISTANCE CHECK (SHORT CIRCUIT CHECK)(a) Disconnect the connectors on both ends.(b) Measure the resistance between the applicable terminals

of the connectors and body ground. Be sure to carry outthis check on the connectors on both ends.Resistance: 1 M Ω or higher

HINT:Measure the resistance while lightly shaking the wire harnessvertically and horizontally.

5. VISUAL CHECK AND CONTACT PRESSURE CHECK(a) Disconnect the connectors at both ends.(b) Check for rust or foreign material, etc. in the terminals of

the connectors.(c) Check crimped portions for looseness or damage and

check that the terminals are secured in lock portion.HINT:The terminals should not come out when pulled lightly from theback.

Z17004

Fig. 1

OPEN

ECU

2

Sensor

2 2 211 1 1ABC

Z17005

Fig. 2

ECU

Sensor

21

ABC1 12 2

B04722

Fig. 3

ECU

Sensor

21

AC1

122

12

1B1B2


30Author: Date:

2000 MR2 (RM760U)

(d) Prepare a test male terminal and insert it in the female ter-minal, then pull it out.

NOTICE:When testing a gold–plated female terminal, always use agold–plated male terminal.HINT:When the test terminal is pulled out more easily than others,there may be poor contact in that section.

6. CHECK OPEN CIRCUITFor the open circuit in the wire harness in Fig. 1, perform ”(a)Continuity Check” or ”(b) Voltage Check” to locate the section.

(a) Check the continuity.(1) Disconnect connectors ”A” and ”C” and measure

the resistance between them.In the case of Fig. 2:Between terminal 1 of connector ”A” and terminal 1of connector ”C” → No continuity (open)Between terminal 2 of connector ”A” and terminal 2of connector ”C” → ContinuityTherefore, it is found out that there is an open circuitbetween terminal 1 of connector ”A” and terminal 1of connector ”C”.

(2) Disconnect connector ”B” and measure the resis-tance between the connectors.In the case of Fig. 3:Between terminal 1 of connector ”A” and terminal 1of connector ”B1” → ContinuityBetween terminal 1 of connector ”B2” and terminal1 of connector ”C” → No continuity (open)Therefore, it is found out that there is an open circuitbetween terminal 1 of connector ”B2” and terminal1 of connector ”C”.

Z17007

Fig. 4

Sensor

21

AC1 1

2 2

B 5V

5V

5V

0V

Z17008

Fig. 5

21

AC1 12 2

BSHORT

Z17009

Fig. 6

21

AC1 12 2

BSensor

ECU


IN–31

31Author: Date:

2000 MR2 (RM760U)

(b) Check the voltage.In a circuit in which voltage is applied (to the ECU connec-tor terminal), an open circuit can be checked for by con-ducting a voltage check.

As shown in Fig. 4, with each connector still con-nected, measure the voltage between body groundand terminal 1 of connector ”A” at the ECU 5V out-put terminal, terminal 1 of connector ”B”, and termi-nal 1 of connector ”C”, in that order.

If the results are:5V: Between Terminal 1 of connector ”A” and Body Ground5V: Between Terminal 1 of connector ”B” and Body Ground0V: Between Terminal 1 of connector ”C” and Body GroundThen it is found out that there is an open circuit in the wire har-ness between terminal 1 of ”B” and terminal 1 of ”C”.

7. CHECK SHORT CIRCUITIf the wire harness is ground shorted as in Fig. 5, locate the sec-tion by conducting a ”continuity check with ground”.

Check the continuity with ground.(1) Disconnect connectors ”A” and ”C” and measure

the resistance between terminal 1 and 2 of connec-tor ”A” and body ground.In the case of Fig. 6:Between terminal 1 of connector ”A” and bodyground → Continuity (short)Between terminal 2 of connector ”A” and bodyground → No continuityTherefore, it is found out that there is a short circuitbetween terminal 1 of connector ”A” and terminal 1of connector ”C”.

Z17808

Fig. 7

Sensor

21

AB1C1 12 2

12

B2ECU

IN0383

Example

Ground

IN0384

Ground

Ground

ECU Side

W/H Side


32Author: Date:

2000 MR2 (RM760U)

(2) Disconnect connector ”B” and measure the resis-tance between terminal 1 of connector ”A” and bodyground, and terminal 1 of connector ”B2” and bodyground.In the case of Fig. 7:Between terminal 1 of connector ”A” and bodyground → No continuityBetween terminal 1 of connector ”B2” and bodyground → Continuity (short)Therefore, it is found out that there is a short circuitbetween terminal 1 of connector ”B2” and terminal1 of connector ”C”.

8. CHECK AND REPLACE ECUFirst check the ECU ground circuit. If it is faulty, repair it. If it isnormal, the ECU could be faulty, so replace the ECU with a nor-mal functioning one and check that the symptoms appear.

(1) Measure the resistance between the ECU groundterminal and the body ground.

Resistance: 1 Ω or less

(2) Disconnect the ECU connector, check the groundterminals on the ECU side and the wire harnessside for bend and check the contact pressure.

IN04Q–07

–INTRODUCTION TERMSIN–33

33Author: Date:

2000 MR2 (RM760U)

TERMSABBREVIATIONS USED IN THIS MANUAL

Abbreviations Meaning

ABS Anti–Lock Brake System

AC Alternating Current

ACC Accessory

ACIS Acoustic Control Induction System

ACSD Automatic Cold Start Device

A.D.D. Automatic Disconnecting Differential

A/F Air–Fuel Ratio

AHC Active Height Control Suspension

ALR Automatic Locking Retractor

ALT Alternator

AMP Amplifier

ANT Antenna

APPROX. Approximately

A/T Automatic Transmission (Transaxle)

ATF Automatic Transmission Fluid

AUTO Automatic

AUX Auxiliary

AVG Average

AVS Adaptive Variable Suspension

BA Brake Assist

BACS Boost Altitude Compensation System

BAT Battery

BDC Bottom Dead Center

B/L Bi–Level

B/S Bore–Stroke Ratio

BTDC Before Top Dead Center

BVSV Bimetallic Vacuum Switching Valve

Calif. California

CB Circuit Breaker

CCo Catalytic Converter For Oxidation

CD Compact Disc

CF Cornering Force

CG Center Of Gravity

CH Channel

COMB. Combination

CPE Coupe

CPS Combustion Pressure Sensor

CPU Central Processing Unit

CRS Child Restraint System

CTR Center

C/V Check Valve

CV Control Valve

IN–34–INTRODUCTION TERMS

34Author: Date:

2000 MR2 (RM760U)

CW Curb Weight

DC Direct Current

DEF Defogger

DFL Deflector

DIFF. Differential

DIFF. LOCK Differential Lock

D/INJ Direct Injection

DLI Distributorless Ignition

DOHC Double Over Head Cam

DP Dash Pot

DS Dead Soak

DSP Digital Signal Processor

EBD Electronic Brake Force Distribution

ECAM Engine Control And Measurement System

ECD Electronic Controlled Diesel

ECDY Eddy Current Dynamometer

ECU Electronic Control Unit

ED Electro–Deposited Coating

EDIC Electric Diesel Injection Control

EDU Electronic Driving Unit

EFI Electronic Fuel Injection

E/G Engine

EGR–VM Egr–Vacuum Modulator

ELR Emergency Locking Retractor

ENG Engine

ESA Electronic Spark Advance

ETCS Electronic Throttle Control System

EVP Evaporator

E–VRV Electric Vacuum Regulating Valve

EXH Exhaust

FE Fuel Economy

FF Front–Engine Front–Wheel–Drive

F/G Fuel Gage

FIPG Formed In Place Gasket

FL Fusible Link

F/P Fuel Pump

FPU Fuel Pressure Up

Fr Front

FR Front–Engine Rear–Wheel–Drive

F/W Flywheel

FW/D Flywheel Damper

FWD Front–Wheel–Drive

GAS Gasoline

GND Ground

HAC High Altitude Compensator

H/B Hatchback


35Author: Date:

2000 MR2 (RM760U)

H–FUSE High Current Fuse

HI High

HID High Intensity Discharge (Head Lamp)

HSG Housing

HT Hard Top

HWS Heated Windshield System

IAC Idle Air Control

IC Integrated circuit

IDI Indirect Diesel Injection

IFS Independent Front Suspension

IG Ignition

IIA Integrated Ignition Assembly

IN Intake (Manifold, Valve)

INT Intermittent

I/P Instrument Panel

IRS Independent Rear Suspension

J/B Junction Block

J/C Junction Connector

KD Kick–Down

LAN Local Area Network

LB Liftback

LCD Liquid Crystal Display

LED Light Emitting Diode

LH Left–Hand

LHD Left–Hand Drive

L/H/W Length, Height, Width

LLC Long–Life Coolant

LNG Liquified Natural Gas

LO Low

LPG Liquified Petroleum Gas

LSD Limited Slip Differential

LSP & PV Load Sensing Proportioning And Bypass Valve

LSPV Load Sensing Proportioning Valve

MAX. Maximum

MIC Microphone

MIL Malfunction Indicator Lamp

MIN. Minimum

MP Multipurpose

MPX Multiplex Communication System

M/T Manual Transmission

MT Mount

MTG Mounting

N Neutral

NA Natural Aspiration

No. Number

O/D Overdrive


36Author: Date:

2000 MR2 (RM760U)

OEM Original Equipment Manufacturing

OHC Overhead Camshaft

OHV Overhead Valve

OPT Option

O/S Oversize

P & BV Proportioning And Bypass Valve

PCS Power Control System

PCV Positive Crankcase Ventilation

PKB Parking Brake

PPS Progressive Power Steering

PS Power Steering

PTO Power Take–Off

R & P Rack And Pinion

R/B Relay Block

RBS Recirculating Ball Type Steering

R/F Reinforcement

RFS Rigid Front Suspension

RH Right–Hand

RHD Right–Hand Drive

RLY Relay

ROM Read Only Memory

Rr Rear

RR Rear–Engine Rear–Wheel Drive

RRS Rigid Rear Suspension

RWD Rear–Wheel Drive

SDN Sedan

SEN Sensor

SICS Starting Injection Control System

SOC State Of Charge

SOHC Single Overhead Camshaft

SPEC Specification

SPI Single Point Injection

SRS Supplemental Restraint System

SSM Special Service Materials

SST Special Service Tools

STD Standard

STJ Cold–Start Fuel Injection

SW Switch

SYS System

T/A Transaxle

TACH Tachometer

TBI Throttle Body Electronic Fuel Injection

TC Turbocharger

TCCS TOYOTA Computer–Controlled System

TCV Timing Control Valve

TDC Top Dead Center


37Author: Date:

2000 MR2 (RM760U)

TEMP. Temperature

TEMS TOYOTA Electronic Modulated Suspension

TIS Total Information System For Vehicle Development

T/M Transmission

TMC TOYOTA Motor Corporation

TMMK TOYOTA Motor Manufacturing Kentucky, Inc.

TRAC Traction Control System

TURBO Turbocharge

U/D Underdrive

U/S Undersize

VCV Vacuum Control Valve

VENT Ventilator

VIN Vehicle Identification Number

VPS Variable Power Steering

VSC Vehicle Skid Control

VSV Vacuum Switching Valve

VTV Vacuum Transmitting Valve

w/ With

WGN Wagon

W/H Wire Harness

w/o Without

1st First

2nd Second

2WD Two Wheel Drive Vehicle (4x2)

4WD Four Wheel Drive Vehicle (4x4)

IN0CI–02


38Author: Date:

2000 MR2 (RM760U)

GLOSSARY OF SAE AND TOYOTA TERMSThis glossary lists all SAE–J1930 terms and abbreviations used in this manual in compliance with SAE rec-ommendations, as well as their TOYOTA equivalents.

SAE

ABBREVIATIONSSAE TERMS

TOYOTA TERMS

( )––ABBREVIATIONS

A/C Air Conditioning Air Conditioner

ACL Air Cleaner Air Cleaner, A/CL

AIR Secondary Air Injection Air Injection (AI)

AP Accelerator Pedal –

B+ Battery Positive Voltage +B, Battery Voltage

BARO Barometric Pressure HAC

CAC Charge Air Cooler Intercooler

CARB Carburetor Carburetor

CFI Continuous Fuel Injection –

CKP Crankshaft Position Crank Angle

CL Closed Loop Closed Loop

CMP Camshaft Position Cam Angle

CPP Clutch Pedal Position –

CTOX Continuous Trap Oxidizer –

CTP Closed Throttle Position LL ON, Idle ON

DFI Direct Fuel Injection (Diesel) Direct Injection (DI)

DI Distributor Ignition –

DLC1

DLC2

DLC3

Data Link Connector 1



1: Check Connector

2: Total Diagnosis Comunication Link (TDCL)

3: OBD II Diagnostic Connector

DTC Diagnostic Trouble Code Diagnostic Code

DTM Diagnostic Test Mode –

ECL Engine Control Level –

ECM Engine Control Module Engine ECU (Electronic Control Unit)

ECT Engine Coolant Temperature Coolant Temperature, Water Temperature (THW)

EEPROM Electrically Erasable Programmable Read Only Memory

Electrically Erasable Programmable Read Only Memory

(EEPROM),

Erasable Programmable Read Only Memory (EPROM)

EFE Early Fuel Evaporation Cold Mixture Heater (CMH), Heat Control Valve (HCV)

EGR Exhaust Gas Recirculation Exhaust Gas Recirculation (EGR)

EI Electronic Ignition TOYOTA Distributorless Ignition (TDI)

EM Engine Modification Engine Modification (EM)

EPROM Erasable Programmable Read Only Memory Programmable Read Only Memory (PROM)

EVAP Evaporative Emission Evaporative Emission Control (EVAP)

FC Fan Control –

FEEPROMFlash Electrically Erasable Programmable

Read Only Memory–

FEPROM Flash Erasable Programmable Read Only Memory –

FF Flexible Fuel –

FP Fuel Pump Fuel Pump

GEN Generator Alternator

GND Ground Ground (GND)


39Author: Date:

2000 MR2 (RM760U)

HO2S Heated Oxygen Sensor Heated Oxygen Sensor (HO2S)

IAC Idle Air Control Idle Speed Control (ISC)

IAT Intake Air Temperature Intake or Inlet Air Temperature

ICM Ignition Control Module –

IFI Indirect Fuel Injection Indirect Injection (IDL)

IFS Inertia Fuel–Shutoff –

ISC Idle Speed Control –

KS Knock Sensor Knock Sensor

MAF Mass Air Flow Air Flow Meter

MAP Manifold Absolute PressureManifold Pressure

Intake Vacuum

MC Mixture Control

Electric Bleed Air Control Valve (EBCV)

Mixture Control Valve (MCV)

Electric Air Control Valve (EACV)

MDP Manifold Differential Pressure –

MFI Multiport Fuel Injection Electronic Fuel Injection (EFI)

MIL Malfunction Indicator Lamp Check Engine Lamp

MST Manifold Surface Temperature –

MVZ Manifold Vacuum Zone –

NVRAM Non–Volatile Random Access Memory –

O2S Oxygen Sensor Oxygen Sensor, O2 Sensor (O2S)

OBD On–Board Diagnostic On–Board Diagnostic System (OBD)

OC Oxidation Catalytic Converter Oxidation Catalyst Convert (OC), CCo

OP Open Loop Open Loop

PAIR Pulsed Secondary Air Injection Air Suction (AS)

PCM Powertrain Control Module –

PNP Park/Neutral Position –

PROM Programmable Read Only Memory –

PSP Power Steering Pressure –

PTOX Periodic Trap OxidizerDiesel Particulate Filter (DPF)

Diesel Particulate Trap (DPT)

RAM Random Access Memory Random Access Memory (RAM)

RM Relay Module –

ROM Read Only Memory Read Only Memory (ROM)

RPM Engine Speed Engine Speed

SC Supercharger Supercharger

SCB Supercharger Bypass E–ABV

SFI Sequential Multiport Fuel Injection Electronic Fuel Injection (EFI), Sequential Injection

SPL Smoke Puff Limiter –

SRI Service Reminder Indicator –

SRT System Readiness Test –

ST Scan Tool –

TB Throttle Body Throttle Body

TBI Throttle Body Fuel InjectionSingle Point Injection

Central Fuel Injection (Ci)

TC Turbocharger Turbocharger

TCC Torque Converter Clutch Torque Converter


40Author: Date:

2000 MR2 (RM760U)

TCM Transmission Control Module Transmission ECU, ECT ECU

TP Throttle Position Throttle Position

TR Transmission Range –

TVV Thermal Vacuum ValveBimetallic Vacuum Switching Valve (BVSV)

Thermostatic Vacuum Switching Valve (TVSV)

TWC Three–Way Catalytic Converter

Three–Way Catalytic (TWC)

Manifold Converter

CCRO

TWC+OC Three–Way + Oxidation Catalytic Converter CCR + CCo

VAF Volume Air Flow Air Flow Meter

VR Voltage Regulator Voltage Regulator

VSS Vehicle Speed Sensor Vehicle Speed Sensor

WOT Wide Open Throttle Full Throttle

WU–OC Warm Up Oxidation Catalytic Converter –

WU–TWC Warm Up Three–Way Catalytic Converter –

3GR Third Gear –

4GR Fourth Gear –

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