Toyota Camry Manual page 157

AX1–84
Diag. Trouble Code 62 63 Shift Solenoid Valve No–1 and No.2 Circuit
CIRCUIT DESCRIPTION
Shifting from 1 st to O/D is performed in combination with ON and OFF of the shift solenoid valves
No.1 and No.2 controlled by the 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 this 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 sending current to the short circuited solenoid).
NORMAL
Position
Solenoid valve
No. 1 No. 2
OFF
OFF
OFF OFF
OFF
OFF
OFF
x : Malfunctions
Check the shift solenoid valve No.1 when diagnostic trouble code 62 is output and check the shift
solenoid valve No.2 when diagnostic trouble code 63 is output.
Code No. Diag. Trouble Code Detection Condition
(a) Solenoid resistance is 8W or lower (short
(b) Solenoid resistance is 100 kW or higher
The ECM checks for an open or short circuit in
the shift solenoid valve No–1 and No.2 circuit
when it changes gear position.
62,63
The ECM records diag. trouble code 62 or 63 if condi
tion (a) or (b) is detected once, but it does not blink the
O/D OFF indicator light.
After the ECM detects condition (a) or (b) con–
tinuously 8 times or more, it cancels the O/D OFF indi
cator light to blink until condition (a) or (b) disappears
After that, if the ECM detects condition (a) or
(b) once, it starts blinking the O/D OFF indi–
cator light again.
AUTOMATIC TRANSAXLE
SOLENOID VALVE NO.1
MALFUNCTIONING
Solenoid valve
Gear
No. 1
No. 2
2nd
3rd
O/D
OFF
2nd
3rd
OFF
2nd
circuit) when solenoid is energized.
(open circuit) when solenoid is not
energized.
– TROUBLESHOOTING
SOLENOID VALVE N0.2
MALFUNCTIONING
Solenoid valve
Gear
No. 1
No.2
3rd
3rd
OFF
3rd OFF
O/D
OFF
3rd
3rd
OFF
3rd
OFF
2nd
Shift solenoid valve No.1 or No.2
Harness or connector between shift solenoid
valve No.1 or No.2 and ECM connector
ECM
BOTH SOLENOID VALVES
MALFUNCTIONING
Gear when shift selector
Gear
is manually operated
O/D
O/D
O/D
O/D O/D
O/D
O/D
3rd
3rd
3rd
3rd
3 rd
Trouble area