1997 TOYOTA SUPRA engine

W03534
21E 1G
1E1G II1
IF1
IF1
II1
1E 1B3
7
9
4
2
131211 21
2
Battery
1B
5 11 DLC1
Relay Block No.2
ALT
Power
Power
Airbag Sensor
Assembly
Junction Block No.1
Junction Block No.1
SRS Waring Light215
Junction Block No.1
*1: 2JZ-GE Engine
*2: 2JZ-GTE Engine ECU-BTc
ABB (*1)
(*2) B-Y
LA 12
W-RP-B R (*1)
(*2)
P-B
P-B
2
2A2P-B
7
Tc
W-L
ABTc DLC2
R
4
12B-Y
B B
B
B DI-598
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
826 Author
: Date
:
1997 SUPRA (RM502U)
SRS Warning Light System Malfunction (Always lit up, when igni-
tion switch is in LOCK position.)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and E
1 of the DLC1 are connected, the DTC is displayed by the blinking of the SRS warn-
ing light.
WIRING DIAGRAM
DI4WS-01

DI4WW-01
THEFT DETERRENT SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date of VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Weather Conditions
When Problem
Occurred Frequency Problem OccursWeather
Outdoor temperature
/ /

Constant
Sometimes ( Times per day, month)

Once only Brought in

Theft deterrent system cannot be set.

Indicator light does not flash when the theft deterrent system is set.
(It stays on or does not light at all.)

Theft deterrent system
does not operate.
When unlocked using the
door lock knob.

When the engine hood is
opened.

System cannot be
canceled once set.
When door is unlocked using key or wireless door lock control system.

When the key is inserted in the ignition key cylinder and turned to ACC or ON
position.
(However, only when the system has never operated)

When the luggage compartment door is opened with the key.

System cannot be
canceled during warning
operation.
When door is unlocked using key or wireless door lock control system.

When the key is inserted in the ignition key cylinder and turned to ACC or ON
position.

Warning operation starts when the system is set and the door or luggage compartment door is opened with
the key.

Others.
Date Problem First Occurred

Fine
Cloudy
Rainy
Snowy

Various/Others

Hot
Warm
Cool

Cold (Approx. 5F ( 5C))
Problem Symptom
Malfunction

Horns only

Theft deterrent horn only

Headlights only

Taillights only

Starter cut only

Door lock operation only
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-609
837 Author
: Date
:
1997 SUPRA (RM502U)
CUSTOMER PROBLEM ANALYSIS CHECK

DI4WX-01
DI-610
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
838 Author
: Date
:
1997 SUPRA (RM502U)
PRE-CHECK
1. Setting Conditions:
SETTING OF THE THEFT DETERRENT SYSTEM
(a) Close all the doors.
(b) Close the engine hood and luggage compartment door.
(c) Remove the ignition key from the ignition key cylinder.
2. Setting Operation:
SETTING OF THE THEFT DETERRENT SYSTEM
When any of the following operations (a) or (c) is done, the theft deterrent indicator light will light up as de-
scribed.
(1) Lock the left or right front door using the key. (All doors are locked by key-interlinked lock opera-
tion)
(2) With the rear doors locked and with one of the front doors locked, lock the other front door without
using the key (keyless door lock).
Elapsed time after operationIndicator light
Within about 30 secondsLight up
After about 30 secondsBlinks *1
*1: 1 sec. on, 1 sec. off
HINT:
When the theft deterrent system is set, doors cannot be locked or unlocked with the door lock control switch
and the luggage compartment door cannot be unlocked with the luggage compartment door opener switch.
3. Cancelling Operation:
CANCELING OF THE THEFT DETERRENT SYSTEM IN THE SET CONDITION
HINT:

Check if the theft deterrent indicator light is blinking.

When any of the following operation (a), (b), (c) or (d) is done, the theft deterrent system is canceled
and indicator light will go off.
(a) Unlock the left or right front door using the key.
(b) Insert the ignition key in the ignition key cylinder and turn it to the ACC or ON position. (This is operative
only when the theft deterrent system has never operated.)
(c) Unlock the luggage compartment door with the key. *
1
*1: The theft deterrent systems is temporarily canceled only while the luggage compartment door is open.
Approximately 2 seconds after the luggage compartment door is closed, the theft deterrent system is reset.

N09348
TOYOTA
hand-held tester
TOYOTA
break-out-boxECU
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-61 1
839 Author
: Date
:
1997 SUPRA (RM502U)
4. CHECK OF THE THEFT DETERRENT SYSTEM OPERATION.
HINT:
Check if the theft deterrent indicator light is blinking.
When any of the following operations (a) or (b) is done, the system sounds the horns as theft deterrent horn
and flashes the headlights and taillights for about one minute to alert. At the same time, the system discon-
nects the starter motor circuit and locks all doors (if all doors are not locked, the system repeats door locking
operation every 2 seconds during the one minute alert time).
(a) Open the engine hood using the engine hood opener lever.
(b) Unlock any of the front or rear doors without key operation.
5. CANCELING OF THE THEFT DETERRENT SYSTEM IN OPERATING CONDITION.
The theft deterrent operation can be cancelled when any of the following conditions is met:
No.ConditionCancelling Operation
1Unlock left or right door with the key.
2Unlock doors with wireless door lock control system.
3Insert key into ignition key cylinder and turn it to the ACC or ON position.*2
4About 1 minute passes after theft deterrent operation begins.Automatic stop*1
*1: In this case, the theft deterrent system resets in about 2 seconds if all doors are closed.
*
2: The alarm will be off, but the engine will not operate. To restart the engine, see No.1
6. ECU TERMINAL VALUES MEASUREMENT USING
TOYOTA BRAKE-OUT-BOX AND TOYOTA HAND-
HElD TESTER
(a) Hook up the TOYOTA brake- out- box and TOYOTA
hand-held tester to the vehicle.
(b) Read the ECU input/output values by following the
prompts on the hand-held tester screen.
HINT:
TOYOTA hand-held tester has a ºSnapshotº function. This re-
cords the measured values and is effective in the diagnosis of
intermittent problems.
Please refer to the TOYOTA hand-held tester/TOYOTA break-
out-box operator's manual for further details.

DI4WY-01
I02535
Theft Deterrent Horn
R/B No.2

Headlight Relay

Horn Relay

Starter Relay
Engine Hood Courtesy
Switch
HornTheft Deterrent Horn
(2JZ-GTE)
(2JZ-GE)
Theft Deterrent and Door
Lock ECU
Door Key Lock and Unlock
Switch
Door Lock Control Switch
Door Lock Motor and Door Unlock
Detection Switch
Door Courtesy SwitchLuggage Room Light Switch Door Key Lock and Unlock
Switch Door Lock Control Switch
Back Door Key Unlock Switch
(Power Window Master Switch)
DI-612
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
840 Author
: Date
:
1997 SUPRA (RM502U)
PARTS LOCATION

DI4WZ-01
I02536
3
25 21
976411
10
24 23 18 85
22 21 2019 17 16 15 14 13 12 98 7
65432 1 T13
T7
Theft Deterrent and Door Lock Control ECU
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-613
841 Author
: Date
:
1997 SUPRA (RM502U)
TERMINALS OF ECM
TerminalsSymbolsConditionStandard Value
+B2 e Ground
(T7-9 eGround)L-W e GroundAlways.10 - 14 V
ACT- e ACT+ (T7-2 eT7-3)L-Y e L-RIgnition switch is turned to ºOFFº position.Below 50W
RLY e Ground
(T7-6 eGround)Y e GroundIgnition switch is turned to ºONº position.10 - 14 V
IG e Ground
(T7-7 eGround)B-R e GroundIgnition switch is turned to ºONº position.10 - 14 V
ACC e E (T7-8 eT7-4)L-Re W-BIgnition switch is turned to ºACCº position.10 - 14 V
+B1 e Ground
(T13-1 eGround)R e GroundAlways.10 - 14 V
DSWLE (T13 4T7 4)LGWBLuggage compartment door courtesy switch ON (door opened).Below 1 WDSWL e E (T13-4 e T7-4)LG e W-BLuggage compartment door courtesy switch OFF (door closed).1 MW or higher
L1E (T13 5T7 4)RWWBDoor lock control switch ºlockº position.Below 1 WL1 e E (T13-5 e T7-4)R-W e W-BDoor lock control switch OFF or ºunlockº position.1 MW or higher
UL3E (T13 6T7 4)GWBDoor key lock and unlock switch ºunlockº position.Below 1WUL3 e E (T13-6 e T7-4)G e W-BDoor key lock and unlock switch OFF or ºlockº position.1MW or higher
DSWDE (T13 7T7 4)RBWBDoor open detection switch (driver's) ON (door opened).Below 1WDSWD e E (T13-7 e T7-4)R-B e W-BDoor open detection switch (driver's) OFF (door closed).1MW or higher
UL1E (T13 8T7 4)GRWBDoor lock control switch ºunlockº position.Below 1WUL1 e E (T13-8 e T7-4)G-R e W-BDoor lock control switch OFF or ºlockº position.1MW or higher
LUGE (T13 9T7 4)LWBLuggage compartment door key lock and unlock switch ON.Below 1WLUG e E (T13-9 e T7-4)L e W-BLuggage compartment door key lock and unlock switch OFF.1MW or higher
HEAD e E (T13-10eT7-4)R-Y e W-BLight control switch other than ºHEADº position.10 - 14 V
SH e E (T13-11 eT7-4)P-B e W-BAlways.10 - 14 V
IND e Ground
(T13-12 e Ground)W-L e GroundAlways.Below 270 W
DSWHE (T13 14T7 4)GRWBEngine hood courtesy switch ON (hood opened).Below 1WDSWH e E (T13-14 e T7-4)G-R e W-BEngine hood courtesy switch OFF (hood closed).1MW or higher
LSWDE (T13 15T7 4)LWWBDoor unlock detection switch ON (door opened).Below 1WLSWD e E (T13-15 e T7-4)L-W e W-BDoor unlock detection switch OFF (door closed).1MW or higher
UL2E (T13 16T7 4)WWBDoor key lock and unlock switch ºunlockº position.Below 1WUL2 e E (T13-16 e T7-4)W e W-BDoor key lock and unlock switch OFF or ºlockº position.1MW or higher
DSWPE (T13 19T7 4)RLWBDoor open detection switch (passenger's) ON (door opened).Below 1WDSWP e E (T13-19 e T7-4)R-L e W-BDoor open detection switch (passenger's) OFF (door closed).1MW or higher
KSWE (T13 20T7 4)YWBKey unlock warning switch ON.Below 1WKSW e E (T13-20 e T7-4)Y e W-BKey unlock warning switch OFF.1MW or higher

DI4X0-01
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-615
843 Author
: Date
:
1997 SUPRA (RM502U)
PROBLEM SYMPTOMS TABLE
Proceed to the reference page shown in the matrix chart below for each malfunction symptom and trouble-
shoot for each circuit.
HINT:
Troubleshooting of the theft deterrent system is based on the premise that the door lock control system is
operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that
the door lock control system is operating normally.
Theft Deterrent System:
Details of ProblemInspecting Circuit *1See page
1. Indicator light circuitDI-617
2. Luggage compartment door key lock and unlock switch
circuitDI-633
The theft deterrent system cannot be set3. Luggage compartment door courtesy switch circuitDI-636
4. Door courtesy switch circuitDI-640
5. Engine hood courtesy switch circuitDI-642
The indicator light does not blink when system is setIndicator light circuitDI-617

When the system is set

When the back door is opened by a method other than the key

The system does not operate
Luggage compartment door courtesy switch circuitDI-636

When the system is set

When the engine hood is opened

The system does not operate
Engine hood courtesy switch circuitDI-642

While the system is in warning operation

Horns do not soundHorn relay circuitDI-621

While the system is in warning operation

Theft deterrent horn does not soundTheft deterrent horn circuitDI-623

While the system is in warning operation

Headlights do not flashHeadlight control relay circuitDI-626

While the system is in warning operation

Taillights do not flashTaillight control relay circuitDI-628

While the system is in warning operation

The starter cut is not cut offStarter relay circuitDI-619

When the system is set

It is not canceled when the ignition key is turned to ACC or ON
position
Ignition switch circuitDI-630

When the system is set

It still operates when the back door is opened with the keyLuggage compartment door key lock and unlock switch
circuitDI-633
System is still set even when a rear door is openDoor courtesy switch circuitDI-640

Even when the system is not set

Horns soundHorn relay circuitDI-621

Even when the system is not set

Theft deterrent horn soundsTheft deterrent horn circuitDI-623

Even when the system is not set

Headlights stay onHeadlight control relay circuitDI-626

Even when the system is not set

Taillights stay onTaillight control relay circuitDI-628
*1:
If numbers are given to the circuit proceed with troubleshooting in the order indicated by those numbers.

I02540
START
Disconnect
SPLY (+)
DI-620
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
848 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
HINT:
This troubleshooting is based on the premise that engine cranking occurs.
If the engine does not crank, proceed to the engine troubleshooting on page DI-3 or DI-141 (Vol. 1).
1 Check voltage between terminal SRLY of theft deterrent and door lock ECU con-
nector and body ground.
PREPARATION:
(a) Remove the instrument panel. (See page BO-50)
(b) Disconnect the ECU connector.
CHECK:
Measure voltage between terminal SRLY of theft deterrent ECU
connector and body ground, when ignition switch is turned to
ST position.
OK:
Voltage: 10 - 14 V
OK Check and replace theft deterrent ECU.
NG
Check and repair harness and connector between starter and theft deterrent and door lock ECU
(See page IN-28).