Toyota Camry Manual page 1440

DTC P0753, P0758
CIRCUIT DESCRIPTION
Shifting from 1st to O/D is performed in combination with ON and OFF of the shift solenoid valves No.1 and
No.2 controlled by ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM con-
trols the remaining normal shift solenoid valve to allow the vehicle to be operated smoothly (Fail safe func-
tion).
Fail Safe Function:
If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid
ON and OFF to shift to the gear positions shown in the table below. The ECM also turns the shift solenoid
valve SL OFF at the same time. If both solenoids are 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
ON OFF
ON ON
D
OFF
ON
OFF OFF
ON OFF
2
ON
ON
OFF ON
ON OFF
L
ON ON
X: Malfunctions
Check the shift solenoid valve No.1 when DTC P0753 is output and check the shift solenoid valve No.2 when
DTC P0758 is output.
DTC No.
The ECM checks for an open or short circuit in the shift sole-
noid valves No.1 and No.2 circuit when it changes gear posi-
tion.
The ECM records DTC P0753 or P0758 if condition (a) or (b) is
detected once, but it does not light up MIL.
P0753
After 1 sec. ECM detects condition (a) or (b) in a trip again, it
P0758 causes the MIL to light up.
(a) When the solenoid is energized, the solenoid resistance is
8 Ω or less and is counted.
(b) When the solenoid is not energized, the solenoid resistance
is 100 kΩ or more and is counted.
DIAGNOSTICS
Shift Solenoid A/B Electrical Malfunc-
tion (Shift Solenoid Valve No.1/No.2)
SHIFT SOLENOID NO.1
MALFUNCTIONING
Solenoid valve
Gear
No.1 No.2
ON
X
1st
ON
2nd
X
3rd
X ON
OFF
O/D
X
ON
1st X
ON
2nd
X
ON
3rd X
1st X OFF
ON
2nd X
DTC Detecting Condition
– AUTOMATIC TRANSAXLE (A140E)
SHIFT SOLENOID NO.2
MALFUNCTIONING
Solenoid valve
Gear
No.1 No.2
ON X
3rd
3rd
OFF
X
3rd OFF
X
OFF
O/D
X
ON
X
3rd
OFF
3rd X
OFF
3rd X
1st ON X
2nd ON X
D Open or short in shift solenoid valve No.1/No.2 circuit
D Shift solenoid valve No.1/No.2
D ECM
Author :
BOTH SOLENOIDS MAL-
FUNCTIONING
Gear when shift selector is
Gear
manually operated
O/D
1st
O/D
O/D
O/D O/D
O/D
O/D
1st 3rd
3rd
3rd
3rd
3rd
1st 1st
1st 1st
Trouble Area
Date :
DI–413
DI033–02
648