Page 945 of 1807
I02564
ON
2 (+)
1 (+)
3 (+)
1 (+) LH
RH
(+) (-)
DI-654
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
882 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check voltage between terminals 2(3), 1(1) of door lock control switch connector
and body ground.
PREPARATION:
Remove the door trim.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals 2(3), 1(1) of door lock
control switch connector and body ground, when door
lock control switch is pressed to the lock side, unlock side
and OFF position.
OK:
Switch positionTerminal 2(3)Terminal 1(1)
Lock sideBelow 1 V8 - 10 V
Unlock side8 - 10 VBelow 1 V
OFF8 - 10 V8 - 10 V
HINT:
The terminal number without brackets is for the LH, the number
with brackets is for the RH.
OK Proceed to next circuit inspection shown on
matrix chart (See page DI-615).
NG
Page 946 of 1807

I02565
2
1
8
2 LH
RH
3
4
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-655
883 Author: Date:
1997 SUPRA (RM502U)
2 Check door lock control switch.
PREPARATION:
Disconnect the door lock control switch connector.
CHECK:
Check continuity between terminals 2(3), 1(2), 8(4) of door lock
control switch connector, when door lock control switch is
pressed to the lock side, and unlock side and OFF position.
OK:
Switch positionTerminal No. to continuity
Lock side2(3) - 8(4)
Unlock side1(2) - 8(4)
OFF
HINT:
The terminal number without brackets is for the LH, the number
with brackets is for the RH.
NG Replace door lock control switch.
OK
3 Check harness and connectors between ECU and door lock control switch,
switch and body ground (See page IN-28).
NG Repair or replace harness or connector.
OK
Check and replace ECU. *1
*1: Malfunction of the ECU can be considered possible only when the problem symptom as follows:
Lock and/or unlock using the Door Lock Control Switch cannot be done, neither on the driver's side nor
on the passenger's side.
Page 947 of 1807
I02566
Door Key Lock and
Unlock Switch LHTheft Deterrent and
Door Lock ECU
Door Key Lock and
Unlock Switch RH J/B No.1
W-B
W-BT13
W-BW-BG-Y
WW
G-Y
G-YG-Y G
UL3
L2
UL2 W12V
12V
1J1
1D 10
IL1 161
2
2
1 33ID1
ID1
IL1
IL1273 13
6
22
16
IE
IH
DI-656
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
884 Author: Date:
1997 SUPRA (RM502U)
Door Key Lock and Unlock Switch Circuit
CIRCUIT DESCRIPTION
The door key lock and unlock switch is built in the door key cylinder.
When the key is turned to the lock side, terminal 3 of the switch is grounded and when the key is turned to
the unlock side, terminal 1 of the switch is grounded.
WIRING DIAGRAM
DI4XH-01
Page 948 of 1807
N16147
2
31
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-657
885 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check door key lock and unlock switch.
PREPARATION:
(a) Remove the door trim and service hole cover.
(b) Disconnect the door key lock and unlock switch connec-
tor.
CHECK:
Check continuity between terminals 1, 2 and 3 of door key lock
and unlock switch connector, when door key lock and unlock
switch is turned to the lock side, unlock side and when it is not
turned.
OK:
Switch positionTerminal No. to continuity
Lock side2 - 3
Unlock side1 - 3
OFF-
NG Replace door key lock and unlock switch.
OK
2 Check harness and connectors between ECU and switch, switch and body
ground (See page IN-28).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown on
matrix chart (See page DI-615).
Page 949 of 1807
I02567I02567
Theft Deterrent and
Door Lock ECU
Key Unlock Warning
SwitchT13
12V
Y
20 KSW
IF1 Y11
2 1 W-B J/B No.1
W-B
1K
1J12
1
IE
DI-658
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
886 Author: Date:
1997 SUPRA (RM502U)
Key Unlock Warning Switch Circuit
CIRCUIT DESCRIPTION
The key unlock warning switch goes on when the ignition key is inserted in the key cylinder and goes off when
the ignition key is removed.
The ECU operates the key confinement prevention function while the key unlock warning switch is on.
WIRING DIAGRAM
DI4XI-01
Page 950 of 1807
I02712
Disconnect
1
2
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-659
887 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check key unlock warning switch.
PREPARATION:
Disconnect key unlock warning switch connector.
CHECK:
Check continuity between terminal 1 and 2 of key unlock warn-
ing switch connector, when the key is inserted to the key cylin-
der or removed.
OK:
Switch positionTerminal No. to continuity
ON (Key inserted)1 - 2
OFF (Key removed)-
NG Replace key unlock warning switch.
OK
2 Check harness and connectors between ECU and key unlock warning switch,
key unlock warning switch and body ground (See page IN-28).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown on
matrix chart (See page DI-615).
Page 951 of 1807
DI4XJ-01
Customer Problem Analysis Check
Check and Clear DTC (Precheck)
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not occur
DTC CheckNormal code
DTC Chart
Problem Symptoms Table
Circuit InspectionInput Signal Check
Parts Inspection
Identification of Problem
Repair
Confirmation Test or Road Test *
EndItems inside
are titles of pages in this
manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations. 1
2
34
5
6
7
89
10
Step 2, 5, 8, 10: Diagnostic steps permitting the use
of the TOYOTA hand-held tester or
TOYOTA break-out-box. P. DI-661
P. DI-662
P. DI-662
P. DI-667
P. IN-18
P. DI-671 - DI-671
P. DI-673 - DI-710
OKNG
Malfunction code
Clear DTC
P. DI-662*: See next page DI-660
- DIAGNOSTICSCRUISE CONTROL SYSTEM
888 Author: Date:
1997 SUPRA (RM502U)
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.
Page 952 of 1807

DI4XK-01
CRUISE CONTROL SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date of VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Condition of
Problem Occurrence
Date of Problem
How Often does
Occurrence
Problem Occur?
Vehicle Speed when
Problem Occurred / /
Continuous Intermittent ( Times a day)
km
Mile Brought in
Auto cancel
occurs Driving condition
City driving Freeway Up hill Down hill
After cancel occurred, did the driver activate cruise control
again?
Yes No
Cancel does not
occur With brake ON
Except D position shift
When control SW turns to CANCEL position
Cruise control
malfunction Slip to acceleration side
Slip to deceleration side
Hunting occurs
O/D cut off does not occur
O/D does not return
Switch
malfunction SET ACCEL COAST RESUME CANCEL
Remains ON Does not light up Blinking Symptoms
DTC Check1st Time2nd Time
Normal Code Malfunction Code (Code )
Normal Code Malfunction Code (Code )
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-661
889 Author: Date:
1997 SUPRA (RM502U)
CUSTOMER PROBLEM ANALYSIS CHECK