1995 TOYOTA SUPRA Service Repair Manual

ECU fuel pump fuel filter location length battery replacement octane

Page 657 of 2543

TOYOTA SUPRA 1995 Service Repair Manual 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 t

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

Page 658 of 2543

TOYOTA SUPRA 1995 Service Repair Manual 3. INSPECT BUCKLE SWITCH CONTINUITY
(a) Check that there is continuity between terminals 1 and 2 on
the switch side connector with the switch ON (belt fastened).
(b) Check that there is no continui

Page 659 of 2543

TOYOTA SUPRA 1995 Service Repair Manual SEAT HEATER SYSTEM
PARTS LOCATION
± BODY ELECTRICAL SYSTEMSEAT HEATER SYSTEMBE±57

Page 660 of 2543

TOYOTA SUPRA 1995 Service Repair Manual 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

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 re-
place the part when it is found to be faulty.

Trouble

Parts name (See page)

Seat heaters do not operate
(Driver's and Passenger's)

1. SEAT HTR Fuse (BE±6)
2. Wire Harness

Driver's seat heater does not operate

1. Seat Heater Switch (Driver's) (BE±58)
2. Seat Heater (BE±59)
3. Wire Harness

Passenger 's seat heater does not operate

1. Seat Heater Switch (Passenger's) (BE±58)
2. Seat Heater (BE±59)
3. Wire Harness
Seat heater temperature is too hot 1. Seat Heater (BE±59)
SEAT HEATER SWITCH INSPECTION
1. INSPECT SWITCH CONTINUITY

Condition

Tester connection to
terminal number
Specified condition
Switch ON (LEFT) 2±4 Continuity
Switch ON (RIGHT)

4±6

Continuity
Switch OFF ± No continuity
Illumination circuit 3±5 Continuity
If continuity is not as specified, replace the switch or bulb.
2. INSPECT SWITCH INDICATOR
(a) Connect the positive (+) lead from the battery to terminal 2
and 6 and the negative (±) lead to terminal 1.
(b) Push the switches, check that the indicator lights up. If
operation is not as specified, replace the switch and inspect
the circuits connected to other parts. BE±58
± BODY ELECTRICAL SYSTEMSEAT HEATER SYSTEM

Page 661 of 2543

TOYOTA SUPRA 1995 Service Repair Manual SEAT HEATER INSPECTION
1. INSPECT SEAT CUSHION CONTINUITY
(a) Heat the thermostat with a light.
(b) Inspect the seat heater continuity between terminals.

SEAT HEATER INSPECTION
1. INSPECT SEAT CUSHION CONTINUITY
(a) Heat the thermostat with a light.
(b) Inspect the seat heater continuity between terminals.

Tester connection to
terminal number

Condition

Specified condition
A1±A2 Constant Continuity
A1±B2 Constant Continuity
A2±B2 Constant Continuity
A3±A4

Seat heater temperature
below 25°C(77°F)

Continuity

A4±B1

Seat heater temperature
below 25°C(77°F)

Continuity

A3±A4

Seat heater temperature
above 45°C(113°F)

No Continuity

A4±B1

Seat heater temperature
above 45°C(113°F)
No Continuity
If continuity is not as specified, replace the seat cushion pad.
2. INSPECT SEAT BACK CONTINUITY
Inspect the seat heater continuity between terminals, as
shown.

Tester connection to
terminal number

Condition

Specified condition

1±3

Constant

Continuity
2±4 Constant Continuity
If continuity is not as specified, replace the seat back pad.
± BODY ELECTRICAL SYSTEMSEAT HEATER SYSTEMBE±59

Page 662 of 2543

TOYOTA SUPRA 1995 Service Repair Manual SEAT HEATER RELAY INSPECTION
INSPECT RELAY CONTINUITY

Condition

Tester connection to
terminal number
Specified conditio

Page 663 of 2543

TOYOTA SUPRA 1995 Service Repair Manual ELECTRIC TENSION REDUCER
SYSTEM
PARTS LOCATION
± BODY ELECTRICAL SYSTEMELECTRIC TENSION REDUCER SYSTEMBE±61

Page 664 of 2543

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