1995 TOYOTA SUPRA Service Repair Manual

Page 737 of 2543

TOYOTA SUPRA 1995  Service Repair Manual (See page IN±30).
Check voltage between terminal SH of theft deterrent horn connector
and body ground.
Remove the theft deterrent horn and disconnect the
connector.
Measure voltage between terminal 1

Page 738 of 2543

TOYOTA SUPRA 1995  Service Repair Manual Headlight Control Relay Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the Tr in the ECU to switch on and off at approximately
0.2 sec. intervals. This switches th

Page 739 of 2543

TOYOTA SUPRA 1995  Service Repair Manual INSPECTION PROCEDURE
HINT: The flow chart below is based on the premise that the headlights light up normally whenever the light con±
trol switch is operated. If headlight operation is not normal whe

Page 740 of 2543

TOYOTA SUPRA 1995  Service Repair Manual Taillight Control Relay Circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the Tr in the ECU to switch on and off at approximately
0.2 sec. intervals. This switches th

Page 741 of 2543

TOYOTA SUPRA 1995  Service Repair Manual INSPECTION PROCEDURE
(See page IN±30).
(1) Remove instrument panel.
(See BO section)
(2) Disconnect the ECU connector.
Check and replace theft deterrent ECU.
Measure voltage between terminal TAIL of

Page 742 of 2543

TOYOTA SUPRA 1995  Service Repair Manual Ignition Switch Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ACC position, battery positive voltage is applied to the terminal ACC
of the ECU. Also, if the ignition switch is

Page 743 of 2543

TOYOTA SUPRA 1995  Service Repair Manual (See page IN±30).
Check for short in all the harness and 
components connected to the CIG and ECU±IG
fuses (See attached wiring diagram).
(1) Remove instrument panel.
(See BO section)
(2) Disconnect

Page 744 of 2543

TOYOTA SUPRA 1995  Service Repair Manual Luggage Compartment Door Key Lock and Unlock Switch Circuit
CIRCUIT DESCRIPTION
The luggage compartment door key lock and unlock switch goes on when the back door key cylinder is turned
to the unlock