1997 TOYOTA SUPRA door lock

N16142 N16142
N16142 N16142I04613
Driver's Side
Passenger's Side
2 (+)2 (-)
2 (-)
2 (+) Lock
Unlock
Passenger's Side Driver's Side
4 (-)4 (+)
4 (+)4 (-)
DI-652
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
880 Author
: Date
:
1997 SUPRA (RM502U)
2 Check door lock motor.
PREPARATION:
(a) Remove the door trim and service hole cover.
(b) Disconnect the door lock motor connector.
CHECK:
(a) Connect positive
lead to terminal 2 (4) and negative 
lead to terminal 4 (2) of door lock motor connector.
(b) Connect positive
lead to terminal 4 (2) and negative 
lead to terminal 2 (4) of door lock motor connector.
( ): Passenger's Side.
OK:
(1) Door lock motor locks door.
(2) Door lock motor unlocks door.
HINT:
This inspection must be carried out within 2 seconds.
OK Replace door lock motor.
NG
3 Check harness and connectors between ECU and door lock motor
(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).

I02563
Door Lock Control Switch LH
(Power Window Master Switch)Theft Deterrent and
Door Lock ECU
Door Lock Control Switch RHT13
12V
R-W
G-RL1
5
UL1
8 J/B No.1
W-B
W-BW-BR-W
G-R
R-W
G-R
G-R R-W
W-B
IL1
IL1IL1 ID1ID17
1 2
1 10 1
16
4
2 310
9 IJ
ID8
IHIE
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-653
881 Author
: Date
:
1997 SUPRA (RM502U)
Door Lock Control Switch Circuit
CIRCUIT DESCRIPTION
When the door lock control switch is pushed to the lock side, Lock terminal of the switch is grounded, and
when the switch is pushed to the unlock side, unlock terminal is grounded (See wiring diagram below).
WIRING DIAGRAM
DI4XG-01

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

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.

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

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).

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

6
B HOW TO USE THIS MANUAL
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TO TERMINAL 3 OF THE POWER WINDOW MASTER SW, TERMINAL 2 OF THE POWER WINDOW CONTROL
RELAY AND TERMINAL 8 OF THE POWER WINDOW SW THROUGH THE DOOR FUSE.
1. DRIVER'S WINDOW MANUAL UPº OPERATION BY MASTER SW
HOLDING MANUAL SW (DRIVER'S) ON UPº POSITION LOCATED IN POWER WINDOW MASTER SW, THE CURRENT FLOWS TO TERMINAL 5 OF THE POWER WINDOW CON-
TROL RELAY THROUGH TERMINAL 3 OF THE MASTER SW TERMINAL 2 TO OPERATE A POWER WINDOW CONTROL RELAY. THUS THE CURRENT INSIDE THE RELAY
FLOWS FROM TERMINAL 2 OF THE RELAY TERMINAL 1 TERMINAL 2 OF THE POWER WINDOW MOTOR TERMINAL 1 TERMINAL 4 OF THE RELAY TERMI-
NAL 3 TO GROUND. THE MOTOR TURNS TO ASCENT THE WINDOW. RELEASING THIS SW, THE ROTATION OF MOTOR IS STOPPED AND THE WINDOWS CAN STOP AT
WILL POINT.
(FOR THE MANUAL DOWNº OPERATION, CURRENT FLOWS IN THE REVERSE DIRECTION BECAUSE THE TERMINALS WHERE IT FLOW ARE CHANGED).
2. DRIVER'S WINDOW AUTO DOWNº OPERATION BY MASTER SW
ONCE THE AUTO DOWNº BUTTON OF THE MASTER SW IS PUSHED, THE CURRENT FLOW TERMINAL 9 OF THE POWER WINDOW CONTROL RELAY THROUGH TERMINAL 3
OF THE MASTER SW TERMINALS 8 AND 9 TO OPERATE THE RELAY. THUS THE CURRENT INSIDE THE POWER WINDOW CONTROL RELAY FLOWS FROM TERMINAL 2 OF
THE RELAY TERMINAL 4 TERMINAL 1 OF THE POWER WINDOW MOTOR TERMINAL 2 TERMINAL 1 OF THE RELAY TERMINAL 3 TO GROUND. THE
MOTOR CONTINUES THE ROTATION ENABLING TO DESCENT THE WINDOW.
THE WINDOW DESCENDS TO THE END POSITION. THE CURRENT WILL BE CUT OFF TO RELEASE THE AUTO DOWN FUNCTION BASED ON THE INCREASING CURRENT
BETWEEN TERMINAL 2 OF THE RELAY AND TERMINAL 1 IN RELAY.
3. DRIVER'S WINDOW AUTO DOWN RELEASE OPERATION BY MASTER SW
HOLDING THE MANUAL SW (DRIVER'S) ON UPº POSITION IN OPERATING AUTO DOWN. THE CURRENT FROM TERMINAL 3 OF THE MASTER SW PASSING TERMINAL 2
FLOWS TERMINAL 5 OF THE RELAY AND RELEASES THE AUTO DOWN FUNCTION IN THE POWER WINDOW CONTROL RELAY. RELEASING THE HAND FROM SW, WINDOW
STOPS AND CONTINUING ON TOUCHING SW. THE FUNCTION SWITCHES TO MANUAL UP OPERATION.
4. PASSENGER'S WINDOW UP OPERATION (MASTER SW) AND WINDOW LOCK SW OPERATION
HOLDING PASSENGER'S WINDOW SW (MASTER SW) ON UPº, THE CURRENT FLOWS FROM TERMINAL 3 OF THE MASTER SW PASSING TERMINAL 6 TO TERMINAL 3 OF THE
POWER WINDOW SW (PASSENGER'S) TERMINAL 4 TERMINAL 2 OF THE MOTOR TERMINAL 1 TERMINAL 9 OF THE POWER WINDOW SW TERMINAL 7 
TERMINAL 1 OF THE MASTER SW TERMINAL 4 TO GROUND. THE MOTOR RUNS TO ASCENT THE WINDOW. RELEASING THIS SW, THE ROTATION OF MOTOR IS
STOPPED AND WINDOW CAN STOP AT WILL PLACE. SWITCHING THE WINDOW LOCK SW IN LOCKº POSITION, THE CIRCUIT IS OPENED AND STOPPED THE MOTOR ROTA-
TION.
(FOR THE DOWN OPERATION, CURRENT FLOWS IN THE REVERSE DIRECTION BECAUSE THE TERMINALS WHERE IT FLOWS ARE CHANGED).
P 2 POWER WINDOW CONTROL RELAY
3-GROUND: ALWAYS CONTINUITY
2-GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
5-GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION AND THE MASTER SW AT UP POSITION
8-GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION AND THE MASTER SW AT AUTO DOWN POSITION
9-GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION AND THE MASTER SW AT DOWN OR AUTO DOWN POSITION
P 4 POWER WINDOW MASTER SW
4-GROUND: ALWAYS CONTINUITY
3-GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
WINDOW LOCK SW
OPEN WITH THE WINDOW LOCK SW AT LOCK POSITION
: PARTS LOCATION
CODE SEE PAGE CODE SEE PAGE CODE SEE PAGE
P221P421P621
P321P521
: RELAY BLOCKS
CODE SEE PAGE RELAY BLOCK (RELAY BLOCK LOCATION)
116 R/B NO. 1 (INSTRUMENT PANEL LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE SEE PAGE JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
3814 J/B NO. 3 AND COWL WIRE (INSTRUMENT PANEL LEFT SIDE)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE SEE PAGE JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
ID126 FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL)
IH126 FRONT DOOR LH WIRE AND COWL WIRE (LEFT KICK PANEL)
: GROUND POINTS
CODE SEE PAGE GROUND POINT LOCATION
IC24 COWL LEFT
: SPLICE POINTS
CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS
I 524 COWL WIREQ
R
S
T
U
V
W
X
SERVICE HINTS
SYSTEM OUTLINE