1997 TOYOTA SUPRA key
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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 903 of 1807
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
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 905 of 1807
DI-614
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
842 Author: Date:
1997 SUPRA (RM502U)
LSWPE (T13 21T7 4)GBWBDoor unlock detection switch ON (door opened).Below 1WLSWP e E (T13-21 e T7-4)G-B e W-BDoor unlock detection switch OFF (door closed).1MW or higher
L2E (T13 22T7 4)GYWBDoor key lock and unlock switch ºlockº position.Below 1WL2 e E (T13-22 e T7-4)G-Y e W-BDoor key lock and unlock switch OFF or ºunlockº position.1MW or higher
TA I L e E (T13-23 eT7-4)G-W e W-BLight control switch ºTAILº position.10 - 14 V
HORN e E (T13-24 eT7-4)L-R e W-BHorn switch OFF.10 - 14 V
SRLY e Ground
(T13-25 eGround)L-O e GroundIgnition switch is turned to ºSTº position.
(When park/neutral position switch ºPº position.)10 - 14 V
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 907 of 1807
DI-616
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
844 Author: Date:
1997 SUPRA (RM502U)
Door Lock System:
TroubleSuspect AreaSee page
Whole function of the door lock control system does not operate.
1. ECU Power Source Circuit
2. Actuator Power Source Circuit
3. Door Lock Motor Circuit
4. Theft Deterrent and Door Lock Control ECUDI-644
DI-647
DI-650
DI-623
All doors or some doors are not locked and unlocked with the
door lock control switch and key lock and unlock switch.
1. Door Lock Control Switch Circuit
2. Door key Lock and Unlock Switch Circuit
3. Door Lock Motor Circuit
4. Theft Deterrent and Door Lock Control ECUDI-653
DI-656
DI-650
DI-623
Doors cannot be locked with the door lock control switch. (Doors
lock and unlock normally with the key lock and unlock switch.)
1. Door Lock Control Switch Circuit
2. Key Unlock Warning Switch Circuit
3. Door Courtesy Switch Circuit
4. Theft Deterrent and Door Lock Control ECUDI-653
DI-658
DI-640
DI-623
Doors are not locked or unlocked with the door key lock and un-
lock switch. (Doors lock and unlock normally with the door lock
control switch.)1. Door Key Lock and Unlock Switch Circuit
2.Theft Deterrent and Door Lock Control ECUDI-656
DI-623
Key confinement prevention function does not operate. (Doors
lock and unlock normally with the door key lock and unlock
switch.)1. Key Unlock Warning Switch Circuit
2. Door Unlock Detection Switch CIrcuit
3. Theft Deterrent and Door Lock Control ECUDI-658
DI-638
DI-623
Page 910 of 1807
N19900
1K
1J
IJ2P2P2
C9C9IJ1
EA122
2IB2IF2
I19I19IB1
2
2A
S2S3 4
6
87 B1365
1223
1
2
3510Theft Deterrent and
Door Lock ECU
EA2
EA3
4Starter Relay MAINL-OSRLY
25
Clutch Start Switch(M/T)
21AM2 J/B No.1 STR/B No.2
2
1
2JZ-GTE
2JZ-GE
Battery1
2 B
BL-O
L-O B-WB-WW-R
W-R W-B
B
B B 1 Ignition
SwitchT13
Park/Neutral Start Switch
1
1 B
(A/T)
12
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-619
847 Author: Date:
1997 SUPRA (RM502U)
Starter Relay Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, contact ºaº in the ECU becomes open, creating an open circuit
in terminal ST circuit and making the starter inoperative (starter cut).
In this condition, if one of the following operations is done, the contact ºaº in the ECU is grounded, thus can-
celing the starter cut:
(1) The front LH and RH door is unlocked with a key.
WIRING DIAGRAM
DI4X2-01
Page 912 of 1807
I02710
I02710
Theft Deterrent and
Door Lock ECU R/B No.2
HORN Relay
R/B No2.Horn Switch
HornL-R
L-B HAZ-HORN
BatteryHORN
L-BL-R
L-R W
22
2 2
2
2A 11
1116
14
L-R
L-B 3IB2IF2
24
BT13
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-621
849 Author: Date:
1997 SUPRA (RM502U)
Horn Relay Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the Tr in the ECU to switch on and off in approximately
0.2 sec. cycles. This switches the horn relay on and off, thus the horn blow (See the wiring diagram below).
In this condition, if any of the following operations is done, the Tr in the ECU goes off and the horn relay
switches off, thus the horns stop blowing:
(1) The front LH or RH door is unlocked with a key.
(2) The ignition switch is turned to the ACC or ON position.
(3) Approximately 1 minute elapses.
WIRING DIAGRAM
DI4X3-01