P0753

CIRCUIT DESCRIPTION

DTC Detecting Condition:

Shifting from 1st to O/D is performed in combination with ON and OFF operation of the shift solenoid valves No.1 and No.2 which is controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining the normal shift solenoid valve to allow the vehicle to be operated smoothly (Fail safe function).

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 in order to shift into 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 malfunction, hydraulic control cannot be performed electronically, and so it must be done manually.

Manual shifting as shown in the following table must be done (In case of a short circuit, the ECM stops sending the current to the short circuited solenoid).

HINT:
- Check the shift solenoid valve No.1 when DTC P0753 is output.
- Check the shift solenoid valve No.2 when DTC P0758 is output.

Wiring Diagram:

Step 1:

Step 2:

Step 3:

INSPECTION PROCEDURE