P0757

DTC P0757

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0757

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Shift Solenoid (SS) 2 Valve Performance - Stuck On

Circuit/System Description

The shift solenoid valve 2 and transmission control module are part of the control solenoid valve assembly and are not serviced separately. The shift solenoid valve 2 is a normally closed solenoid valve and controls fluid to the hybrid low, 1-2 clutch boost valve assembly and related clutches. During this diagnostic test, intrusive actions are taken by the transmission control module to test the shift solenoid valve 2 to see if the valve is stuck ON when in dual motor or dual motor and ICE modes. If the correct gear ratio is not achieved in a predetermined period of time, the transmission control module commands second gear and if second gear ratio is attained this indicates a stuck ON shift solenoid valve 2 and the DTC will set.

Conditions for Running the DTC

* Shift from two motor to any other state.

* Line pressure is greater than 325 kpa.

Conditions for Setting the DTC

Transmission pressure switch 1 is high when shift solenoid valve 2 is commanded Off.

Action Taken When the DTC Sets

P0757 is a Type A DTC.

Conditions for Clearing the DTC

P0757 is a Type A DTC.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

1. Verify that P0966, P0967, P0969, P0970, P0971, P0973, P0974, P0976, P0977, P2720, P2721, P2728, P2729, or P2730 is not set.

• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

2. Perform the Transmission Fluid Level and Condition Check Testing and Inspection.

3. Perform the Line Pressure Check Line Pressure Check.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.

5. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test.

• If the shift solenoid 2 is found to be leaking or stuck ON, replace the Q8 control solenoid valve assembly.

• If the Q8 control solenoid valve assembly tests normal, inspect the valve body and hydraulic circuits for a leak or a stuck valve. Refer to Control Valve Body Diagnostic Inspection Control Valve Body Diagnostic Inspection

6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Control Valve Body Replacement Control Valve Body Replacement for control valve body replacement.

* Control Module References Programming and Relearning for Control Solenoid Valve Assembly and Transmission Control Module Assembly replacement, programming, and setup.

* Perform the Reset Transmission Adapts Programming and Relearning following all transmission related repairs.