P2769

AA80E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P2769: Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)

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

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

DESCRIPTION

Based on the ON/OFF condition of the solenoid valve SL, the TCM controls the fluid pressure to the lock-up relay valve, and performs lock-up control.






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 smooth torque converter clutch engagement. The shift solenoid valve SL responds to commands from the TCM and controls the lock-up relay valve to perform the torque-converter lock-up function. If the TCM detects an open or short circuit in the shift solenoid valve SL circuit, it will illuminate the MIL.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

P2769: Range check (low resistance)





P2770: Range check (high resistance)





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND TRANSMISSION WIRE (TRANSMISSION WIRE - TCM, TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL))





(a) Disconnect the TCM connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
OK -- Continue to next step.
2. REPLACE TCM
(a) Replace the TCM Removal.
NEXT -- PERFORM A/T CODE REGISTRATION
3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)





(a) Disconnect the transmission wire connector.
(b) Disconnect the TCM connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT SHIFT SOLENOID VALVE SL





(a) Remove the shift solenoid valve SL Disassembly.
(b) Measure the resistance of the shift solenoid valve.
Standard resistance:





(c) Connect the battery's positive (+) lead to the terminal of the solenoid valve connector, and the negative (-) lead to the solenoid body. Then check that the valve moves and makes an operating sound.
OK:
Valve moves and makes operating sound.
NG -- REPLACE SHIFT SOLENOID VALVE SL
OK -- REPAIR OR REPLACE TRANSMISSION WIRE