TOYOTA SUPRA 1995 Service Repair Manual

A/C noise.Whining noise occurs when A/C is operating.
Fuel gauge noise.
NoiseNOISE PRODUCED WHEN ENGINE STARTS
Whistling noise which becomes high±pitched
when accelerator strongly depressed, disap-
pears shortly after engine stops.
Clicking sound heard when horn button is
pressed, then released. Whirring/grating sound
when pushed continuously.
Scratching noise occurs during sudden accelera-
tion, driving on rough roads or when ignition
switch is turned on.
Alternator noise.
Horn noise.
Ignition noise.
Turn signal noise.
Washer noise.
Murmuring sound, stops when engine stops.
Tick±tock noise, occurs in co±ordination with
blinking of flasher.
Noise occurs during window washer operation.
Scraping noise in time with wiper beat.
Scratching noise occurs while engine is running,
continues a while even after engine stops.
Other type of noise.
Engine coolant temp. gauge noise.
Wiper noise.
± BODY ELECTRICAL SYSTEMAUDIO SYSTEMBE±109

Glass printed
antenna faulty.
Motor antenna
faulty
AntennaANTENNA ± RELATED
Does antenna extend when radio
switched ON?
Inspect antenna motor.
Temporarily install another antenna
Functions OK?
Inspect glass printed antenna.
Radio side faulty.
Antenna motor faulty.
Relay faulty.
Relay circuit faulty.
Inspect antenna motor control relay.
(Relay circuit)
Is power released to the antenna being
input to the antenna motor control relay?
Radio side faulty.
Check continuity between antenna motor
control relay and radio.Wire harness faulty.
BE±110± BODY ELECTRICAL SYSTEMAUDIO SYSTEM

Display E:
ANTI±THEFT SYSTEM
operation condition.
(ID number input error
10 times or more.)Display A:
ID Number is set.Display B
Anti±theft
SystemTROUBLESHOOTING FOR ANTI±THEFT SYSTEM
Turn Ignition key from Lock position to ACC position.
Cancel ID number, refer to each malfunction item.
Take to designated radio
service station.
[ISEC] Display Disappears
After 1 Second.
Normal operation
Refer to each
malfunction item.
(Liquid Crystal Display (LCD) for Audio System)
Cancel ID number, refer to each malfunction item.
ANTI±THEFT SYSTEM operation condition.
[ID number input error 9 times or less.]
Input ID number to cancel ANTI±THEFT SYSTEM, and check display.
Radio switch ON.
ANTI±THEFT SYSTEM not
cancelled.
(ID number input error 9
times or less.)
ANTI±THEFT SYSTEM cancelled.
Check audio system again.
Radio Display
Display BDisplay D
Radio switch ON.
Display EDisplay C"ADisplay BDisplay A " B
Display D
Radio switch ON.Take to designated radio
service station.Refer to each
malfunction item.
Normal
operation
Normal operation.
ID number
input error
time
Blank,
No Illumination
Display B
Display E
Display DDisplay ADisplay C
HINT:
a) Refer to O/M for operation details of ANTI±THEFT SYSTEM.
b) When the ID number has been cancelled, reset the same number after completing the operation,
or inform the customer that it has been cancelled.
± BODY ELECTRICAL SYSTEMAUDIO SYSTEMBE±111

ANTENNA ROD REMOVAL AND
INSTALLATION
1. REMOVE ANTENNA ROD
HINT: Do this operation with the negative (±) terminal cable
connected to the battery.
(a) Turn the ignition switch to ºLOCKº position.
(b) Remove the antenna nut.
(c) P r e s s t h e º A M º b u t t o n o n t h e r a d i o r e c e i v e r, a n d
simultaneously turn the ignition switch to ºACCº position.
HINT:
wThe rod will extend fully and be released from the motor
antenna.
wAfter removing the antenna rod, leave the ignition switch
at ºACCº.
NOTICE: To prevent body damage when the antenna rod
is released, hold the rod while it comes out.
2. INSTALL ANTENNA ROD
(a) Insert the cable of the rod until it reaches the bottom.
HINT:
wWhen inserting the cable, the teeth on the cable must
face toward the rear of the vehicle.
wInsert the cable approx. 400 mm.
(b) Wind the cable to retract the rod by turning the ignition switch
to ºLOCKº position.
HINT:
wIf the ignition switch is already in ºLOCKº position, do
step 1 (c) first, then turn the ignition switch to ºACCº
position.
wIn case the cable is not wound, twist it as shown in the
illustration.
wEven if the rod has not retracted fully, install the antenna
nut and inspect the antenna rod operation. It will finally
retract fully.
(c) Inspect the antenna rod operation by pushing the radio wave
band select buttons. BE±112
± BODY ELECTRICAL SYSTEMAUDIO SYSTEM

MOTOR ANTENNA CONTROL RELAY
INSPECTION
INSPECT RELAY CIRCUIT
Disconnect the connector from the relay and inspect connec-
tor on wire harness side, as shown in the chart.
 
 
Tester connection to
terminal number 
 Condition 
 Specified condition
 6±Ground Constant Continuity
 2±3 Constant Continuity 
 1±Ground
 
 Constant
 
 Battery positive voltage
 4±Ground Ignition switch position ON Battery positive voltage
 5±Ground Ignition switch position ACC or ON Battery positive voltage
 
 7±Ground
 
 Ignition switch position ACC or ON
and radio switch ON 
 Battery positive voltage
 8±Ground Ignition switch position ACC or ON Battery positive voltage
If circuit is not as specified, replace the relay.
± BODY ELECTRICAL SYSTEMAUDIO SYSTEMBE±113

MOTOR ANTENNA INSPECTION
INSPECT MOTOR ANTENNA
(a) Install antenna nut.
(b) Connect the positive (+) lead from the battery to terminal 1
and the negative (±) lead to terminal 2.
(c) Check that the motor turns (moves upward).
NOTICE: These tests must be done quickly (within 3±5
seconds) to prevent the coil from burning out.
(d) Then, reverse the polarity, check that the motor turns the
opposite way (moves downward).
NOTICE: These tests must be done quickly (within 3±5
seconds) to prevent the coil from burning out.
HINT: When the motor is normal, lower the antenna to its low-
est position.
If operation is not as specified, replace the antenna motor as-
sembly.
GLASS PRINTED ANTENNA
INSPECTION
1. INSPECT GLASS PRINTED ANTENNA
(Use same procedure as for ºINSPECT DEFOGGER
WIRESº.)
2. REPAIR GLASS PRINTED ANTENNA
(Use same procedure as for ºREPAIR DEFOGGER
WIRESº.) BE±114
± BODY ELECTRICAL SYSTEMAUDIO SYSTEM

(a) Check that the battery positive voltage is 10 Ð 16 V.
If voltage is not as specified, replace the battery.
(b) Check that the DOME fuse is not blown.
If the fuse is blown, replace the fuse and check for
short.
(c) Troubleshoot the clock as follows.
HINT: Inspect the connector on the wire harness side.
Is there battery positive voltage between
terminal +B and body ground?Open or short circuit in wire harness be-
tween terminal +B and DOME fuse.
Is there continuity between terminal
GND and body ground?Open circuit in wire harness between ter-
minal GND and body ground.
Replace clock assembly.
CLOCK
TROUBLESHOOTING
HINT: Troubleshoot the clock according to the table below.
 Clock will not operate  1 
 Clock loses or gains time
 
 2
 
 1
 
 CLOCK WILL NOT OPERATE
± BODY ELECTRICAL SYSTEMCLOCKBE±115

Is there 10±16 V between terminal +B
and body ground?Locate cause, and repair or recharge bat-
tery.
Adjust or replace clock assembly.
Below 10 V
 
 2
 
 CLOCK LOSES OR GAINS TIME
(a) Check that the battery positive voltage is 10 Ð 16 V.
If voltage is not as specified, replace the battery.
(b) Inspect the error of the clock.
Allowable error (per day):
2.0 seconds.
If the error exceeds the allowable error, replace the
clock assembly.
(c) check if the clock adjusting button is sticking in position
and has failed to return.
If the button has not returned, repair or replace the
clock assembly.
(d) Troubleshoot the clock as follows:
HINT: Inspect the connector on the wire harness side. BE±116
± BODY ELECTRICAL SYSTEMCLOCK

THEFT DETERRENT AND DOOR LOCK CONTROL SYSTEM
PARTS LOCATION
± BODY ELECTRICAL SYSTEMTHEFT DETERRENT AND DOOR LOCK CONTROL SYSTEMBE±117

BE±118± BODY ELECTRICAL SYSTEMTHEFT DETERRENT AND DOOR LOCK CONTROL SYSTEM