P2770

DTC P2769 Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)

DTC P2770 Open Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)

DESCRIPTION
The shift solenoid valve SL is turned ON or OFF by signals from the TCM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.





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

MONITOR DESCRIPTION
Based on the signals from the throttle position sensor, the air flow meter and the crankshaft position sensor, the TCM sends a signal to the solenoid valve SL to regulate the hydraulic pressure and provide smoother torque converter clutch engagement. The shift solenoid valve SL responds to commands from the TCM. The valve controls the lock-up relay valve to perform the torque-converter lock-up function. If the TCM detects an open or short circuit for shift solenoid valve SL, it will illuminate the MIL.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE

WIRING DIAGRAM:

INSPECTION PROCEDURE

Step 1-2: