1995 TOYOTA SUPRA door lock

INTEGRATION RELAY INSPECTION
INSPECT RELAY CIRCUIT
Light Auto Turn Off System
Remove the relay from junction block and inspect the con-
nectors on the wire harness and junction block side, as
shown in the chart.
 
 
Tester connection to
terminal number 
 Condition 
 Specified condition
 A6±Ground  Driver's door courtesy switch OFF No continuity
 A6±Ground Driver's door courtesy switch ON Continuity
 A10±Ground Constant Continuity
 B1±Ground Light control switch position OFF or TAIL No continuity
 B1±Ground Light control switch position HEAD Continuity
 B4±Ground Light control switch position OFF No continuity B4±Ground Light control switch position TAIL or HEAD Continuity A1±Ground Constant Battery positive voltage 
 A7±Ground
 
 Ignition switch position LOCK or ACC
 
 No voltage
 A7±Ground Ignition switch position ON Battery positive voltage
 B2±Ground Constant Battery positive voltage
 B3±Ground Constant Battery positive voltage
If the circuit is as specified, try replacing the relay with a new
one.
If the circuit is not as specified, inspect the circuits connected
to other parts.
DOOR COURTESY SWITCH INSPECTION
See page BE±28
± BODY ELECTRICAL SYSTEMHEADLIGHT AND TAILLIGHT SYSTEMBE±17

TROUBLESHOOTING
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes
of the malfunction are shown in the order of their probability. Inspect each part in the order shown, and
replace the part when it is found to be faulty.
 Trouble Parts name (See page) 
 
 
Only one light does not light up.
 
 
 
1. Bulb
2. Wire Harness
 
 
 
Interior light does not light up (All).
 
 
 
1. DOME Fuse (BE±5)
2. Integration Relay (BE±29)
3. Wire Harness
 
 
 
 
ºIlluminated Entry Systemº does not operate.
 
 
 
 
1. Integration Relay (BE±29)
2. Door Courtesy Switch (BE±28)
3. Door Key Lock and Unlock Switch (BE±158)
4. Door Unlock Detection Switch (BE±145)
5. Wire Harness
 
 
 Front personal light does not light up.
 
 
 
1. Bulb
2. Front Personal Light (BE±27)
3. Wire Harness
 
 Luggage room light does not light up.
 
 1. Bulb
2. Luggage Room Light Switch (BE±28)
PERSONAL LIGHT SWITCH INSPECTION
1. INSPECT INTERIOR LIGHT CONTINUITY
 
 Switch position
 
 Tester connection to
terminal number 
 Specified condition
 
 DOOR 
 1±3 
 Continuity
 OFF ± No continuity
2. INSPECT PERSONAL LIGHT CONTINUITY
 
 Switch position
 
 Tester connection to
terminal number 
 Specified condition
 
OFF 
± 
No continuity 
 *ON
 
 1±2
 
 Continuity
* Set the interior light switch to OFF or DOOR.
If continuity is not as specified, replace the light assembly or
bulb.
± BODY ELECTRICAL SYSTEMINTERIOR LIGHT SYSTEMBE±27

INTEGRATION RELAY INSPECTION
INSPECT RELAY CIRCUIT
Remove the relay from junction block and inspect the con-
nector on the junction block side, as shown in the chart.
 
 Tester connection to
terminal number 
 Condition
 
 Specified condition
 4±Ground Courtesy Switch Position OFF (Door closed) No continuity 
 4±Ground
 
 Courtesy Switch Position ON (Door opened)
 
 Continuity
 10±Ground Constant Continuity
 1±Ground Constant Battery positive voltage
 7±Ground Ignition switch position / LOCK or ACC No voltage 
 7±Ground
 
 Ignition switch position / ON
 
 Battery positive voltage
If circuit is as specified, trying replacing the relay with a new
one.
If the circuit is not as specified, inspect the circuits connected
to other parts.
DOOR KEY LOCK AND UNLOCK
SWITCH INSPECTION
See page BE±158
DOOR UNLOCK DETECTION SWITCH
INSPECTION
See page BE±145
± BODY ELECTRICAL SYSTEMINTERIOR LIGHT SYSTEMBE±29

INDICATOR LIGHTS
TroubleParts name (See page) 
 
 SRS Indicator Light does not light up
 
 
 
1. Bulb
2. Wire Harness
3. Center Air Bag Sensor (RS Section)
 
 
 
ABS Indicator Light does not light up
 
 
 
1. Bulb
2. Wire Harness
3. Traction ECU (BR Section)
 
 
 
Malfunction Indicator Light does not light up
 
 
 
1. Bulb
2. ECM (EG Section)
3. Wire Harness
 
 
 
TRAC OFF Indicator Light does not light up
 
 
 
1. Bulb
2. Traction Solenoid Relay (BR Section)
3. Traction ECU (BR Section)
4. Wire Harness
 
 
 
Security Indicator Light does not light up
 
 
 
1. Light Emitting Diode
2. Theft Deterrent and Door Lock ECU (BE±123)
3. Wire Harness
 
 
 
 
A/T Shift Position Indicator Light does not light up
 
 
 
 
1. Bulb
2. Park/Neutral Position Switch (AT1 Section)
3. Light Control Rheostat (BE±54)
4. Meter Circuit Plate (BE±44)
5. Wire Harness
 
 
 
 
MANU Indicator Light does not light up
 
 
 
 
1. Bulb
2. ECM (EG Section)
3. Meter Circuit Plate (BE±44)
4. Wire Harness
 
 
 
 
O/D OFF Indicator Light does not light up
 
 
 
 
1. Bulb
2. O/D Main Switch
3. ECM (EG Section)
4. Meter Circuit Plate (BE±44)
5. Wire Harness
 
 
 
 
TRAC Indicator Light does not light up
 
 
 
 
1. Bulb
2. ABS and Traction ECU
3. Meter Circuit Plate (BE±44)
4. Wire Harness
 
 
 
Turn Indicator Light does not light up
 
 
 
1. Bulb
2. Turn Signal and Hazard Warning System (BE±20)
3. Meter Circuit Plate (BE±44)
4. Wire Harness
 
 
 
 
High Beam Indicator Light does not light up
 
 
 
 
1. Bulb
2. Headlight System (BE±10)
3. Meter Circuit Plate (BE±44)
4. Wire Harness
 
 
 
CRUISE Indicator Light does not light up
 
 
 
1. Bulb
2. Cruise Control ECU (BE±170)
3. Meter Circuit Plate (BE±44)
4. Wire Harness
± BODY ELECTRICAL SYSTEMCOMBINATION METERBE±43

SEAT BELT WARNING INSPECTION
1. INSPECT INTEGRATION RELAY OPERATION
(a) Connect the positive (+) lead from the battery to terminals 1
and 7.
(b) Connect the positive (+) lead from the battery to terminal 9
through a 3.4W test bulb.
(c) Check that the test bulb lights up and buzzer sounds for 4±8
seconds when the negative (±) lead from the battery is
connected to terminal 10.
(d) Check that the buzzer sounding in (c) stops when the
negative (±) lead from the battery is connected to terminal 8.
If operation is not as specified, replace the integration relay.
2. INSPECT RELAY CIRCUIT
Remove the relay from the junction block No.1 and inspect
the connectors on the junction block side.
 
 Tester connection to
terminal number 
 Condition
 
 Specified condition
 4±Ground Driver's door open Continuity 
 4±Ground
 
 Driver's door close
 
 No continuity
 5±Ground Ignition key Set Continuity
 5±Ground Ignition key remove No continuity
 8±Ground Driver's seat belt fasten Continuity 
 8±Ground
 
 Driver's seat belt unfasten
 
 No continuity
 10±Ground Constant Continuity
 1±Ground Constant Battery positive voltage
 9±Ground Ignition switch position ON Battery positive voltage 
 9±Ground
 
 Ignition switch position LOCK or ACC
 
 No voltage
If circuit is not as specified, try replacing the relay with a new
one.
± BODY ELECTRICAL SYSTEMCOMBINATION METERBE±55

TROUBLESHOOTING
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes
of the malfunction are shown in the order of their probability. Inspect each part in the order shown, and
replace the part when it is found to be faulty.
 Trouble Parts name (See page)
 
 
 
 
 
 
*1 Power window does not operate.
 
 
 
 
 
 
1. ALT Fuse (BE±5)
2. POWER Fuse (BE±5)
3. AM 1 Fuse (BE±5)
4. DOOR Fuse (BE±6)
5. Ignition Switch (BE±8)
6. Power Window Master Switch (BE±69)
7. Wire Harness
 
 
 
 
 
*2 Power Window does not operate.
 
 
 
 
 
1. GAUGE Fuse (BE±6)
2. Power Main Relay (BE±73)
3. Ignition Switch (BE±8)
4. Power Window Master Switch (BE±69)
5. Wire Harness
 ºOne Touch Power Window Systemº does not operate. 1. Power Window Master Switch (BE±69) 
 
 
 
Only one window glass does not move.
 
 
 
 
1. Power Window Master Switch (BE±69)
2. Power Window Switch (BE±71)
3. Power Window Motor (BE±71)
4. Wire Harness
 ºWindow Lock Systemº does not operate. 1. Power Window Master Switch (BE±69) 
 Illumination does not light up.
 
 1. Power Window Master Switch (BE±69)
*1 Power door lock does not operate.
*
2 Power door lock is normal. BE±68
± BODY ELECTRICAL SYSTEMPOWER WINDOW CONTROL SYSTEM

POWER WINDOW SWITCH INSPECTION
INSPECT SWITCH CONTINUITY
 
 Switch position
 
 
Tester connection to
terminal number 
 Specified condition
 
 UP
 
 
1±4
3±5 
 Continuity
 
 OFF
 
 1±2
3±5 
 Continuity
 
 DOWN
 
 1±2
3±4 
 Continuity
If continuity is not as specified, replace the switch.
POWER WINDOW MOTOR INSPECTION
1. INSPECT MOTOR OPERATION
Driver 's Door
(a) Connect the positive (+) lead from the battery to terminal 1
and the negative (±) lead to terminal 2, check that the motor
turns clockwise.
(b) R e v e r s e t h e p o l a r i t y, c h e c k t h a t t h e m o t o r t u r n s
counterclockwise.
If operation is not as specified, replace the motor.
Passenger 's Door
(a) Connect the positive (+) lead from the battery to terminal 1
and the negative (±) lead to terminal 2, check that the motor
turns clockwise.
± BODY ELECTRICAL SYSTEMPOWER WINDOW CONTROL SYSTEMBE±71

(b) R e v e r s e t h e p o l a r i t y, c h e c k t h a t t h e m o t o r t u r n s
counterclockwise.
If operation is not as specified, replace the motor.
2. INSPECT PTC OPERATION
Driver 's Door
(a) Disconnect the connector from the master switch.
(b) Connect the positive (+) lead from the battery to terminal 9
and the negative (±) lead to terminal 10 on the wire harness
side connector and raise the window to the fully closed
position.
(c) Continue to apply voltage, check that there is a PTC
operation noise within approximately 4 to 90 seconds.
(d) Reverse the polarity, check that the window begins to
descend within approximately 60 seconds.
If operation is not as specified, replace the motor.
Passenger 's Door
(a) Disconnect the connector from the power window switch.
(b) Connect the positive (+) lead from the battery to terminal 2
and the negative (±) lead to terminal 5 on the wire harness
side connector, and raise the window to the fully closed
position.
(c) Continue to apply voltage, check that there is a PTC
operation noise within approximately 4 to 90 seconds.
(d) Reverse the polarity, check that the window begins to
descend within approximately 60 seconds.
If operation is not as specified, replace the motor. BE±72
± BODY ELECTRICAL SYSTEMPOWER WINDOW CONTROL SYSTEM