1995 TOYOTA SUPRA Service Repair Manual

service reset radio antenna change key battery low oil pressure fuel fill door release reset

Page 457 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Remove No. 2 vehicle speed sensor from trans-
mission (See page AT1±14).
Measure resistance between terminals 1 and 2 of
No. 2 vehicle speed sensor.
Resistance: 560 ± 680
Voltage is generated inte

Page 458 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 62 63 No.1 No. 2 Solenoid Valve Circuit
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is done in combination with ON and OFF of the No.1 and No.2 solenoid valves controlled
by ECM. If an open or s

DTC 62 63 No.1 No. 2 Solenoid Valve Circuit
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is done in combination with ON and OFF of the No.1 and No.2 solenoid valves controlled
by ECM. If an open or short circuit occurs in either of the solenoid valves, the ECM controls the remaining normal
solenoid to allow the vehicle to be operated smoothly (Fail safe function).
Fail Safe Function
If either of the solenoid valve circuits develops a short or an open, the ECM turns the other solenoid ON and
OFF to shift to the gear positions shown in the table below. The ECM also turns the lock±up solenoid valve OFF
at the same time. If both solenoids malfunction, hydraulic control cannot be performed electronically and must
be done manually.
Manual shifting as shown in the following table must be done (In the case of a short circuit, the ECM stops send-
ing current to the short circuited solenoid).

Position

NORMAL

NO.1 SOLENOID
MALFUNCTIONING
NO.2 SOLENOID
MALFUNCTIONING
BOTH SOLENOIDS
MALFUNCTIONING

Position
Solenoid valve
Gear

Solenoid valve
Gear

Solenoid valve
Gear

Gear when shift
selector is manually
No.1 No.2 Gear No.1 No.2 Gear No.1 No.2 Gear
selector is manually
operated
ON OFF 1st X ON 3rd ON X 1st O/D
D ON ON 2nd X ON 3rd OFF X O/D O/D
OFF ON 3rd X ON 3rd OFF X O/D O/D
OFF OFF O/D X OFF O/D OFF X O/D O/D
ON OFF 1st X ON 3rd ON X 1st 3rd
2 ON ON 2nd X ON 3rd OFF X 3rd 3rd
OFF ON 3rd X ON 3rd OFF X 3rd 3rd

L
ON OFF 1st X OFF 1st ON X 1st 1st
L ON ON 2nd X ON 2nd ON X 1st 1st
X: Malfunctions
Check the No.1 solenoid when diagnostic trouble code 62 is output and check and No.2 solenoid when
diagnostic trouble code 63 is output.
DTC No. Diagnostic Trouble Code Detection Condition Trouble Area

62, 63

(a) Solenoid resistance is 8 or lower (short cir±
cuit) when solenoid is energized.
(b) Solenoid resistance is 100 k or higher (open
circuit) when solenoid is not energized.
The ECM checks for an open or short circuit in the
No.1 and No.2 solenoid circuit when it changes
gear position.
The ECM records diag. trouble code 62 or 63 if
condition (a) or (b) is detected once, but it does
not blink the O/D OFF indicator light.
After the ECM detects the condition (a) or (b)
continuously 8 times or more in one±trip *, it
causes the O/D OFF indicator light to blink until
condition (a) or (b) disappears.
After that, if the ECM detects condition (a) or
(b) one, it starts blinking the O/D OFF indicator
light again.

Solenoid valve
Harness or connector between solenoid and
ECM
ECM
* one±trip (1st trip) See page AT1±54 AT1±72
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

Page 459 of 2543

TOYOTA SUPRA 1995 Service Repair Manual WIRING DIAGRAM
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT1±73

Page 460 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Jack up the vehicle.
Remove the oil pan.
Disconnect the solenoid connector.
Measure resistance between solenoid connector
and solenoid body.
Resistance: 10 ± 16
Connect positive (+) lead to termina

Page 461 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DTC 64 Lock±up Solenoid valve Circuit
CIRCUIT DESCRIPTION
The SL solenoid valve is turned ON and OFF by signals from the ECM to control the hydraulic pressure acting
on the lock±up relay valve, whic

Page 462 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Jack up the vehicle.
Remove the oil pan.
Disconnect the lock±up solenoid valve connector.
Measure resistance between lock-up solenoid
connector and solenoid body.
Resistance: 10 ± 16
Connect lock�

Page 463 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Throttle Position Sensor Circuit
CIRCUIT DESCRIPTION
The throttle position sensor detects the throttle valve opening angle and sends signals to ECM.
WIRING DIAGRAM
± AT340E (2JZ±GE) AUTOMATIC TRANSM

Page 464 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE
(See page EG±219).
Turn ignition switch ON.
Do not depress the brake pedal during this test.
The voltage will stay at 0 V if depressed.
Voltage changes from 0 V to 8 V by stages.

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