TOYOTA SUPRA 1997 Service Repair Manual

N08405
AC0RF-02
Z13470
Magnetic Clutch Control
Low Pressure Side High Pressure Side
ON (Continuity)
196 kPa
(2.0 kgf´cm
2, 28 psi)
OFF (No Continuity)3, 140 kPa
(32.0 kgf´cm2, 455 psi)
OFF (No Continuity)
Z13471
Cooling Fan Control
1, 520 kPa
(15.5 kgf´cm2, 220psi)
ON
(Continuity)
OFF
(No Continity)
1, 226 kPa
(12.5 kgf´cm
2, 178psi)
- AIR CONDITIONINGPRESSURE SWITCH
AC-73
2221 Author
: Date
:
1997 SUPRA (RM502U)
PRESSURE SWITCH
ON-VEHICLE INSPECTION
1. SET ON MANIFOLD GAUGE SET
(See page AC-18)
2. DISCONNECT CONNECTOR FROM PRESSURE
SWITCH
3. RUN ENGINE AT APPROX. 2,000 RPM
4. Magnetic Clutch Control:
INSPECT PRESSURE SWITCH OPERATION
( ): 2JZ-GTE
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 4 (1) and the negative (-) lead to terminal 1 (2).
(b) Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.
If operation is not as specified, replace the pressure switch.
5. 2JZ-GTE Engine Models:
Condenser Fan Control:
INSPECT PRESSURE SWITCN OPERATION
(a) Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative (-) lead to terminal 3.
(b) Check continuity between terminals when refrigerant
pressure is changed, as shwn in the illustration.
If operation is not as specified, replace the pressure switch.
6. STOP ENGINE AND SET OFF MANIFOLD GAUGE SET
7. CONNECT CONNECTOR TO PRESSURE SWITCH

AC0RG-01
N08405
AC-74
- AIR CONDITIONINGPRESSURE SWITCH
2222 Author
: Date
:
1997 SUPRA (RM502U)
REMOVAL
1. DISCONNECT REFRIGERANT FROM REFRIGERA-
TION SYSTEM
HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount: 700 ± 50 g (24.69 ± 1.76 oz.)
2. REMOVE PRESSURE SWITCH FROM LIQUID TUBE
Disconnect the connector and remove the pressure switch.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
HINT:

Lock the switch mounted on the tube with an open end
wrench, being careful not to deform the tube and remove
the switch.

At the time of installation, please refer to the following
item.
Lubricate a new O-ring with the compressor oil and install
the switch.

AC0RK-01
N08406
- AIR CONDITIONINGAIR CONDITIONING CONTROL ASSEMBLY
AC-79
2227 Author
: Date
:
1997 SUPRA (RM502U)
AIR CONDITIONING CONTROL
ASSEMBLY
REMOVAL
1. REMOVE CENTER CLUSTER PANEL
(See page BO-50)
2. REMOVE AIR CONDITIONING CONTROL ASSEMBLY
(a) Disconnect the connector.
(b) Remove the 3 screws and air conditioning control assem-
bly.

N08691
AC0RN-01
N08692
AC-82
- AIR CONDITIONINGAIR CONDITIONING AMPLIFIER
2230 Author
: Date
:
1997 SUPRA (RM502U)
AIR CONDITIONING AMPLIFIER
REMOVAL
1. REMOVE CENTER CLUSTER PANEL
(See page BO-50)
2. REMOVE RADIO WITH AIR CONDITIONING AMPLIFI-
ER
(a) Remove the 4 screws and radio with the air conditioning
amplifier.
(b) Disconnect the connectors.
3. REMOVE AIR CONDITIONING AMPLIFIER FROM RA-
DIO
(a) Remove the 4 screws and the 4 bolts.
(b) Remove the air conditioning amplifier from radio.

I03527
AC0RQ-01
- AIR CONDITIONINGENGINE COOLANT TEMPERATURE (ECT) SWITCH
AC-85
2233 Author
: Date
:
1997 SUPRA (RM502U)
ENGINE COOLANT
TEMPERATURE (ECT) SWITCH
REMOVAL
1. REMOVE ENGINE UNDER COVER
2. DRAIN ENGINE COOLANT
HINT:
It is not necessary to drain out all coolant.
3. REMOVE SWITCH
(a) Disconnect the connector.
(b) Remove the switch.
Torque: 7.4 N´m (75 kgf´cm, 65 in.´lbf)
HINT:
At the time of installation, please refer to the following item.
Lubricate a new O-ring with soapy water and install the switch.

P01924
AC0RR-01
AC-86
- AIR CONDITIONINGENGINE COOLANT TEMPERATURE (ECT) SWITCH
2234 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
INSPECT ECT SWITCH CONTINUITY
(a) Using an ohmmeter, check the no continuity exists be-
tween the terminals when the coolant temperature is a
above 100°C (212°F).
If there is continuity, replace the switch.
(b) Using an ohmmeter, check the continuity existsbetween
the terminals when the coolant temperature is below
91°C (196°F).
If there is no continuity, replace the switch.

BE0DL-01
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
BE-1
1979 Author
: Date
:
1997 SUPRA (RM502U)
BODY ELECTRICAL SYSTEM
PRECAUTION
Take care to observe the doing precautions when performing inspections or removal and replacement of
body electrical related parts.
1. HEADLIGHT SYSTEM
Halogen bulbs have pressurized gas inside and require special handling. They can burst if scratched or
dropped. Hold a bulb only by its plastic or metal case.
Don't touch the glass part of a bulb with bare hands.
2. SRS (SUPPLEMENTAL RESTRAINT SYSTEM)
The SUPRA is equipped with an SRS (Supplemental Restraint System) such as the driver airbag and front
passenger airbag. Failure to carry out service operation in the correct sequence could cause the SRS to
unexpectedly deploy during servicing, possibly leading to a serious accident. Before servicing (including re-
moval or installation of parts, inspection or replacement), be sure to read the precautionary notices in the
RS section.
3. AUDIO SYSTEM

If the negative (-) terminal cable is disconnected from the battery, the preset AM, FM 1 and FM 2 sta-
tions stored in memory are erased, so be sure to note the stations and reset them after the battery
terminal is reconnected.

If the negative (-) terminal cable is disconnected from the battery, the ºANTI-THEFT SYSTEMº will
operate when the cable is reconnected, but the radio, tape player and CD player will not operate. Be
sure to input the correct ID number so that the radio, tape player and CD player can be operated again.
4. MOBILE COMMUNICATION SYSTEM
If the vehicle is equipped with a mobile communication system, refer to precautions in the IN section.

BE0DM-02
BE-2
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
1980 Author
: Date
:
1997 SUPRA (RM502U)
PROBLEM SYMPTOMS TABLE
IGNITION SWITCH AND KEY UNLOCK WARNING SWITCH
SymptomSuspect AreaSee page
Ignition switch is not set to each position.1. Ignition SwitchBE-13
ºKey unlock warning systemº does not operate.
1. GAUGE Fuse (J/B No.1)
2. Key Unlock Warning Switch
3. Door Courtesy Switch
4. Wire Harness
BE-13
BE-28
USA:
HEADLIGHT AND TAILLIGHT SYSTEM
SymptomSuspect AreaSee page
Headlight does not light. (Taillight is normal)
1. Headlight Bulb
2. HEAD (LH, RH) Fuse (R/B No.2)
3. Headlight Control Relay (R/B No.2)
4. Integration Relay
5. Headlight Dimmer Switch
6. Light Control Switch
7. Wire Harness
BE-17
BE-13
BE-17
BE-17
Headlight does not light. (Taillight does not light up)
1. Headlight Bulb
2. Integration Relay
3. Light Control Switch
4. Wire Harness
BE-13
BE-17
Only one side light does not light.
1. Headlight Bulb
2. HEAD (LH, RH) Fuse (R/B No.2)
3. Wire Harness
ºLo-Beamº does not light.1. Headlight Dimmer Switch
2. Wire HarnessBE-17
ºHi-Beamº does not light.1. Headlight Dimmer Switch
2. Wire HarnessBE-17
ºFlashº does not light.1. Headlight Dimmer Switch
2. Wire HarnessBE-17

- BODY ELECTRICALBODY ELECTRICAL SYSTEM
BE-3
1981 Author
: Date
:
1997 SUPRA (RM502U)
CANADA:
HEADLIGHT AND TAILLIGHT SYSTEM
SymptomSuspect AreaSee page
Headlight does not light. (Taillight is normal)
1. Headlight Bulb
2. Headlight Control Relay (R/B No.2)
3. D.R.L. Relay
4. D.R.L. No.2 Relay (R/B No.2)
5. D.R.L. No.3 Relay
6. Integration Relay
7. Headlight Dimmer Switch
8. Light Control Switch
9. Wire Harness
BE-17
BE-17
BE-17
BE-17
BE-13
BE-17
BE-17
Headlight does not light.
(Taillight does not light up)
1. D.R.L. Relay
2. D.R.L. No.2 Relay (R/B No.2)
3. D.R.L. No.3 Relay
4. Integration Relay
5. Light Control Switch
6. Wire HarnessBE-17
BE-17
BE-17
BE-13
BE-17
Only one side light does not light.1. Headlight Bulb
2. Wire Harness
ºLo-Beamº does not light (ALL).1. Headlight Control Relay (R/B No.2)
2. Wire HarnessBE-17
ºLo-Beamº does not light (ONE SIDE).
1. Headlight Bulb
2. HEAD LH-LWR Fuse (R/B No.2)
3. HEAD RH-LWR Fuse (R/B No.2)
4. Wire Harness
ºHi-Beamº does not light (ALL).
1. D.R.L. Relay
2. D.R.L. No.2 Relay (R/B No.2)
3. D.R.L. No.3 Relay
4. Headlight Dimmer Switch
5. Wire HarnessBE-17
BE-17
BE-17
BE-17
ºHi-Beamº does not light (ONE SIDE).
1. Headlight Bulb
2. HEAD LH-UPR Fuse (R/B No.2)
3. HEAD RH-UPR Fuse (R/B No.2)
4. Wire Harness
ºFlashº does not light.
1. D.R.L. Relay
2. D.R.L. No.2 Relay (R/B No.2)
3. D.R.L. No.3 Relay
4. Headlight Dimmer Switch
5. Wire HarnessBE-17
BE-17
BE-17
BE-17
ºAuto Turn-of f Systemº dose not operate.
1. GAUGE Fuse (J/B No.1)
2. Integration Relay
3. Door Courtesy Switch (Driver's)
4. Wire Harness
BE-13
BE-28
Headlight does not light with light control SW in HEAD.
1. Integration Relay
2. D.R.L. Relay
3. D.R.L. No.2 Relay (R/B No.2)
4. D.R.L. No.3 Relay
5. Light Control Switch
6. Wire HarnessBE-13
BE-17
BE-17
BE-17
BE-17
Headlight does not go out with light control SW in OFF.1. Headlight Control Relay (R/B No.2)
2. Wire HarnessBE-17

BE-4
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
1982 Author
: Date
:
1997 SUPRA (RM502U) Taillight does not light with light control SW in TAIL.
1. Taillight Relay (J/B No.1)
2. Integration Relay
3. Light Control Switch
4. Wire HarnessBE-17
BE-13
BE-17
Taillight does not go out with light control SW in OFF.
1. Taillight Relay (J/B No.1)
2. Integration Relay
3. Light Control switch
4. Wire HarnessBE-17
BE-13
BE-17
Headlight and Taillight do not light with engine running and light
control SW in OFF.
1. GAUGE Fuse (J/B No.1)
2. Generator L Terminal
3. D.R.L. Relay
4. D.R.L. No.2 Relay (R/B No.2)
5. D.R.L. No.3 Relay
6. Parking Brake Switch
7. Wire Harness
BE-17
BE-17
BE-17
BE-43
FOG LIGHT SYSTEM
SymptomSuspect AreaSee page
Fog light does not light with light control SW HEAD.
(Headlight is normal.)
1. FOG Fuse (R/B No.2)
2. HEAD Fuse (R/B No.2)
3. Fog Light Relay (R/B No.2)
4. Fog Light Switch
5. Wire Harness
BE-23
BE-23
Fog light does not light with light control SW HEAD.
(Headlight does not light)1. Headlight and Taillight system
2. Wire HarnessBE-15
Only one light does not light.1. Bulb
2. Wire Harness
TURN SIGNAL HAZARD WARNING SYSTEM
SymptomSuspect AreaSee page
ºHazardº and ºTurnº do not light up.
1. Hazard Warning Switch
2. Turn Signal Flasher
3. Wire HarnessBE-26
BE-26
The flashing frequency is abnormal.
1. Bulb
2. Turn Signal Flasher
3. Wire Harness
BE-26
Hazard warning light does not light up.
(Turn is normal.)1. HAZ-HORN Fuse (R/B No.2)
2. Wire Harness
Hazard warning light does not light up in one direction.1. Hazard Warning Switch
2. Wire HarnessBE-26
Turn signal does not light up.
(Combination meter, wiper and washer do not operate.)
1. TURN Fuse (J/B No.1)
2. Ignition Switch
3. Turn Signal Switch
4. Wire Harness
BE-13
BE-26
Turn signal does not light up.
1. TURN Fuse (J/B No.1)
2. Turn Signal Switch
3. Wire Harness
BE-26
Turn signal does not light up in one direction.1. Turn Signal Switch
2. Wire HarnessBE-26
Only one bulb does not light up.1. Bulb
2. Wire Harness