1995 TOYOTA SUPRA Service Repair Manual

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Page 561 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check No.4 solenoid valve.
Replace No.4 solenoid valve.
1. Jack up the vehicle.
2. Remove oil pan.
3. Disconnect the connector
Measure resistance between terminal 1 and 2 of
solenoid connector.
Resist

Page 562 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check harness and connector between battery and No.4 solenoid valve,
No.4 solenoid valve and ECM (See page IN±30).
Repair or replace harness or connector.
Proceed to next circuit inspection shown on

Page 563 of 2543

TOYOTA SUPRA 1995 Service Repair Manual CIRCUIT DESCRIPTION
The No. 2 vehicle speed sensor detects the rotation speed of the transmission output shaft and sends
signals to the ECM. The ECM determines the vehicle speed based on these signals

Page 564 of 2543

TOYOTA SUPRA 1995 Service Repair Manual WIRING DIAGRAM
INSPECTION PROCEDURE
Check resistance between terminals SP2+ and SP2± of ECM connector.
Proceed to next circuit inspection shown on matrix
chart (See page AT2±64).
Connect the Check H

Page 565 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Check No.2 vehicle speed sensor.
Replace No.2 vehicle speed sensor.
Remove No.2 vehicle speed sensor from trans-
mission (See page AT2±16).
Measure resistance between terminals 1 and 2 of
No.2 vehicl

Page 566 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 sh

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 the gear positions shown in the table below. If both solenoids malfunction, the hydraulic
control is not made electronically and can only be operated manually.
Manual shifting, as shown in the following table must be done (In the case of a short circuit, the ECM stops
sending current to the short circuited solenoid).

Pi

NORMAL

NO 1 SOLENOID
MALFUNCTIONING
NO 2 SOLENOID
MALFUNCTIONING
BOTH SOLENOIDS
MALFUNCTIONING

Posi-
tion
Solenoid
valve
Gear

Solenoid
valve
Gear

Solenoid valve

Gear

Gear when shift selector
is manually operated No.1 No.2 Gear No.1 No.2 Gear No.1 No.2 Gear 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

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 (S) 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 the 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 circuit) 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 DTC 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, 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 sole±
noid and ECM
ECM
AT2±82± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

Page 567 of 2543

TOYOTA SUPRA 1995 Service Repair Manual WIRING DIAGRAM
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±83

Page 568 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURE
Check No.1 No.2 solenoid valves.
1. Jack up the vehicle.
2. Remove the oil pan.
3. Disconnect the solenoid connector.
Measure resistance between the solenoid con-
nector and solen

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