open hood TOYOTA SUPRA 1997 Service Repair Manual
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Page 53 of 1807
IN0253
WRONG CORRECT
IN0252
WRONG CORRECT
IN0002
Example IN-6
- INTRODUCTIONREPAIR INSTRUCTIONS
6 Author: Date:
1997 SUPRA (RM502U)
(l) Observe the following precautions to avoid damage to the
following parts:
(1) Do not open the cover or case of the ECU, ECM,
PCM or TCM unless absolutely necessary. (If the IC
terminals are touched, the IC may be destroyed by
static electricity.)
(2) To disconnect vacuum hoses, pull on the end, not
the 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, such
as sensors or relays. If they are dropped on a hard
floor, they should be replaced and not reused.
(5) When steam cleaning an engine, protect the elec-
tronic components, air filter and emissions-related
components from water.
(6) Never use an impact wrench to remove or install
temperature switches or temperature sensors.
(7) When checking continuity at the wire connector, in-
sert the tester probe carefully to prevent terminals
from bending.
(8) When using a vacuum gauge, never force the hose
onto a connector that is too large. Use a step-down
adapter for adjustment. Once the hose has been
stretched, it may leak.
(m) Tag hoses before disconnecting them:
(1) When disconnecting vacuum hoses, use tags to
identify how they should be reconnected.
(2) After completing a job, double check that the vacu-
um hoses are properly connected. A label under the
hood shows the proper layout.
(n) Unless otherwise stated, all resistance is measured at an
ambient temperature of 20°C (68°F). Because the resis-
tance may be outside specifications if measured at high
temperatures immediately after the vehicle has been run-
ning, measurements should be made when the engine
has cooled down.
Page 900 of 1807
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
Page 901 of 1807
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.
Page 902 of 1807
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.
Page 904 of 1807
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
Page 906 of 1807
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.
Page 930 of 1807
I02556
Engine Hood Courtesy
SwitchTheft Deterrent and
Door Lock ECU
W-BGR
DSWH GR1412V
GR
EAIB6 IF3
2
14
9
T13
DI-642
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
870 Author: Date:
1997 SUPRA (RM502U)
Engine Hood Courtesy Switch Circuit
CIRCUIT DESCRIPTION
The engine hood courtesy switch is built into the engine hood lock assembly and goes on when the engine
hood is opened and goes off when the engine hood is closed.
WIRING DIAGRAM
DI4XC-01
Page 1123 of 1807
134
THEFT DETERRENT AND DOOR LOCK CONTROL
D10, D11 DOOR COURTESY SW LH, RH
3-2 : CLOSED WITH THE DOOR OPEN
D12, D13 DOOR KEY LOCK AND UNLOCK SW LH, RH
1-3 : CLOSED WITH THE DOOR LOCK CYLINDER UNLOCKED WITH KEY
2-3 : CLOSED WITH THE DOOR LOCK CYLINDER LOCKED WITH KEY
D15, D16 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW LH, RH
1-3 : CLOSED WITH UNLOCK POSITION.
E 6 ENGINE HOOD COURTESY SW
1-2 : CLOSED WITH THE ENGINE HOOD OPEN
U 1 UNLOCK WARNING SW
2-1 : CLOSED WITH THE IGNITION KEY IN CYLINDER
L 3 LUGGAGE COMPARTMENT KEY UNLOCK SW
2-1 : CLOSED WITH THE DOOR LOCK CYLINDER UNLOCKED WITH KEY
L 5 LUGGAGE COMPARTMENT LIGHT SW
1-GROUND : CLOSED WITH THE DOOR OPEN
T 7 (A), T13 (B) THEFT DETERRENT AND DOOR LOCK CONTROL ECU
(B)9-GROUND : CONTINUITY WITH THE LUGGAGE COMPARTMENT DOOR TO UNLOCK POSITION
(B) 14-GROUND : CONTINUITY WITH THE ENGINE HOOD OPEN
(B)4-GROUND : CONTINUITY WITH THE LUGGAGE COMPARTMENT DOOR OPEN
(B)8-GROUND : CONTINUITY WITH THE DOOR LOCK CONTROL SW TO UNLOCK POSITION
(B)5-GROUND : CONTINUITY WITH THE DOOR LOCK CONTROL SW TO LOCK POSITION
(B) 25-GROUND : APPROX. 12 VOLTS WITH THE SHIFT LEVER IN N OR P POSITION AND THE IGNITION SW AT ST POSITION (A/T)
: APPROX. 12 VOLTS WITH THE CLUTCH PEDAL FULLY DEPRESSED (M/T)
(A)7-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
(B) 20-GROUND : CONTINUITY WITH THE IGNITION KEY IN CYLINDER
(B) 15-GROUND : CONTINUITY WITH THE LH DOOR TO UNLOCK POSITION
(B) 21-GROUND : CONTINUITY WITH THE RH DOOR TO UNLOCK POSITION
(B)6-GROUND : CONTINUITY WITH THE DOOR KEY LOCK AND UNLOCK SW LH TO UNLOCK POSITION
(B) 16-GROUND : CONTINUITY WITH THE DOOR KEY LOCK AND UNLOCK SW RH TO UNLOCK POSITION
(B) 22-GROUND : CONTINUITY WITH THE DOOR KEY LOCK AND UNLOCK SW TO LOCK POSITION
(A)4-GROUND : ALWAYS CONTINUITY
(B)1-GROUND : ALWAYS APPROX. 12 VOLTS
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C 928D1630P 830
D1030E624 (2JZ-GTE)T125 (2JZ-GTE)
D1130E 626 (2JZ-GE)T 127 (2JZ-GE)
D1230L 330T 529
D1330L 530T 7A29
D1430P225 (2JZ-GTE)T13B29
D1530P 227 (2JZ-GE)U 129
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 (ENGINE COMPARTMENT LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1D20FRONT DOOR LH WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1H
1I20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
2A22BATTERY AND J/B NO.2 (ENGINE COMPARTMENT LEFT)
SERVICE HINTS
Page 1419 of 1807
MA01D-01
- MAINTENANCEOUTSIDE VEHICLE
MA-1
38 Author: Date:
1997 SUPRA (RM502U)
OUTSIDE VEHICLE
GENERAL MAINTENANCE
These are maintenance and inspection items which are considered to be the owner's responsibility.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
1. GENERAL NOTES
Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.
Every service item in the periodic maintenance schedule must be performed.
Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).
Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.
Failure to do even one item an cause the engine to run poorly and increase exhaust emissions.
2. TIRES
(a) Check the pressure with a gauge. If necessary, adjust.
(b) Check for cuts, damage, uneven or excessive wear.
3. WHEEL NUTS
When checking the tires, check the nuts for looseness or for missing nuts. If necessary, tighten them.
4. WINDSHIELD WIPER BLADES
Check for wear or cracks whenever they do not wipe clean. If necessary, replace.
5. FLUID LEAKS
(a) Check underneath for leaking fuel, oil, water or other fluid.
(b) If you smell gasoline fumes or notice any leak, have the cause found and corrected.
6. DOORS AND ENGINE HOOD
(a) Check that all doors and the tailgate operate smoothly, and that all latches lock securely.
(b) Check that the engine hood secondary latch secures the hood from opening when the primary latch
is released.