DTC P2756-14: Torque Converter Clutch Pressure Control Solenoid Control Circuit Short to Ground or Open [10/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SOLENOID (SLU) VALVE) - ECM)
- Disconnect the C89 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C89-35 (SLU+) - C89-36 (SLU-) 20°C (68°F) 5.0 to 5.6 Ω C89-35 (SLU+) or C89-36 (SLU-) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
See step 3
Result:
OK
See step 2
- REPLACE ECM
Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Result
Proceed to NEXT Result:
NEXT
PERFORM REGISTRATION. Refer to REGISTRATION [10/2022 - ]
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
- Disconnect the C51 transmission wire connector.
- Disconnect the C89 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C51-5 (SLU+) - C89-35 (SLU+) Always Below 1 Ω C51-4 (SLU-) - C89-36 (SLU-) Always Below 1 Ω C51-5 (SLU+) or C89-35 (SLU+) - Body ground and other terminals Always 10 kΩ or higher C51-4 (SLU-) or C89-36 (SLU-) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)
Result:
OK
See step 4
- INSPECT SOLENOID (SLU) VALVE
- Remove the solenoid (SLU) valve.
*a Component without harness connected
(Solenoid (SLU) Valve)Refer to DISASSEMBLY [10/2022 - ]
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Solenoid (SLU) valve connector terminal 1 - terminal 2 20°C (68°F) 5.0 to 5.6 Ω - Connect a positive (+) lead from the battery with a 21 W bulb to terminal 1 and a negative (-) lead to terminal 2 of the solenoid valve connector. Check that the valve moves and makes an operating sound.
OK
Valve moves and makes operating sound.
Result
Proceed to OK NG
Result:
OK
REPAIR OR REPLACE TRANSMISSION WIRE. Refer to REMOVAL [10/2022 - ]
Result:
NG
REPLACE SOLENOID (SLU) VALVE. Refer to REMOVAL [10/2022 - ]
- Remove the solenoid (SLU) valve.