Diesel Data: Automotive Repair

DTC 64

CIRCUIT DESCRIPTION
The SL solenoid valve is turned ON and OFF by signals from the Engine Control Module (ECM) to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.
If a malfunction occurs in this circuit and diagnostic trouble code 64 is stored in memory, the O/D OFF indicator light dose not blink.

Fail Safe Function
If the ECM detects a malfunction, it turns the lock-up solenoid valve OFF.




DETECTING CONDITION




DIAGNOSTIC CHART




WIRING DIAGRAM










INSPECTION PROCEDURE