Troubleshooting

DTC P0743 Torque Converter Clutch Circuit Electrical

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure. And the hydraulic pressure acts on the lock-up relay valve, which controls the operation of the lock-up clutch.

Fail-safe function: If the ECM detects a malfunction, it turns the shift solenoid valve SL OFF.

Wiring Diagram:

Step 1:

Step 2:

INSPECTION PROCEDURE