P2770

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

CIRCUIT DESCRIPTION

DTC Detection Conditions:

The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure in the lock-up relay valve, which then 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.
- The system cannot control the lock-up relay valve. (No relation to 3-4 shift control)

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

Based on the signals from the throttle position sensor, the mass airflow meter and the crankshaft position sensor, the ECM sends a signal to the shift solenoid valve SL to regulate the hydraulic pressure and provide smoother gearshifts. The shift solenoid valve SL responds to the signals from the ECM. The valve controls the lock-up relay valve to perform the torque converter lock-up function. If the ECM detects an open or short circuit of the shift solenoid valve SL, it illuminates the MIL.

Wiring Diagram:

Step 1 - 2:

Step 3:

INSPECTION PROCEDURE