Dtc P2769 Short In Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve Sl)
DESCRIPTION
MONITOR DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
INSPECT 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
Shift solenoid valve SL is turned on and off by signals from the ECM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.DTC No.
| DTC Detection Condition
| Trouble Area
|
P2769
| ECM detects a short in the shift solenoid valve SL circuit when the shift solenoid valve SL is operated (2 trip detection logic).
| - Short in shift solenoid valve SL circuit
- Shift solenoid valve SL
- ECM
|
P2770
| ECM detects an open in the shift solenoid valve SL circuit when the shift solenoid valve SL is not operated (2 trip detection logic).
| - Open in shift solenoid valve SL circuit
- Shift solenoid valve SL
- ECM
|
Fail-safe function:If the ECM detects a malfunction, it turns 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 ECM sends a signal to shift solenoid valve SL to regulate the hydraulic pressure and provide smoother torque converter engagement. Shift solenoid valve SL responds to commands 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 in the shift solenoid valve SL circuit, it will illuminate the MIL and store the DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Perform registration and/or initialization when parts related to the automatic transmission are replaced (LandCruiser RM000000O7H0HSX.html).
- HINT:
- After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
- Perform the Lock-up Function in Road Test (LandCruiser RM000000W790SGX.html).*1
- Turn the engine switch off.
- Perform step (*1) again.
- Check for DTCs again (LandCruiser RM000000W7711KX.html).
| 1.INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL) |
Disconnect the transmission wire connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
1 (SL) - Body ground
| 20°C (68°F)
| 11 to 15 Ω
|
Text in Illustration*a
| Component without harness connected
(Transmission Wire)
|
| 2.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
C152-13 (SL) - Body ground
| 20°C (68°F)
| 11 to 15 Ω
|
Text in Illustration*a
| Rear view of wire harness connector
(to ECM)
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.INSPECT SHIFT SOLENOID VALVE SL |
Remove shift solenoid valve SL (LandCruiser RM000000O9L07IX.html).
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
Shift solenoid valve SL connector terminal - Shift solenoid valve SL body
| 20°C (68°F)
| 11 to 15 Ω
|
Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.
- OK:
Measurement Condition
| Specified Condition
|
- Battery positive (+) → Shift solenoid valve SL connector
- Battery negative (-) → Shift solenoid valve SL body
| Valve moves and makes an operating noise
|
Text in Illustration*1
| Shift Solenoid Valve SL
|
