P0752

DTC P0752

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (with HP2) (Initial Inspection and Diagnostic Overview)Diagnostic System Check - Vehicle (without HP2) (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC P0752
- Shift Solenoid (SS) 1 Valve Performance - Stuck On

Circuit/System Description

The shift solenoid (SS) 1 is part of the control solenoid (w/body and transmission control module (TCM)) valve assembly and is not serviced separately. The control solenoid (w/body and TCM) valve assembly supplies 12 volts to SS 1 on the high side driver 1 circuit. The control solenoid (w/body and TCM) valve assembly controls the normally closed SS 1 on the SS 1 control circuit. The SS 1 controls the transmission fluid to the 1-3 clutch regulator valve assembly.

In the OFF position, SS 1 controls the transmission fluid to the following components:

* EVT 1 mode, oil is supplied to drive motors with generator 1 and 2 for cooling and the hybrid low, 1-2 clutch.
* Gear 1, oil is supplied to the hybrid low, 1-2 clutch and the 1-3 clutch.
* Gear 2, oil is supplied to the hybrid low, 1-2 clutch and the hybrid direct, 2-3-4 clutch.

In the ON position, SS 1 controls the transmission fluid to the following components:

* EVT 2 mode, oil is supplied to drive motors with generator 1 and 2 for cooling and the hybrid direct, 2-3-4 clutch.
* Gear 3, oil is supplied to the hybrid direct, 2-3-4 clutch and the 1-3 clutch.
* Gear 4, oil is supplied to the hybrid direct, 2-3-4 clutch and the 4th clutch.

Conditions for Running the DTC

EVT 1, gear 1, or gear 2 is commanded.

Conditions for Setting the DTC

The TCM detects shift solenoid valve 1 is ON when commanded OFF.

Action Taken When the DTC Sets

P0752 is a Type B DTC.

Conditions for Clearing the DIC/DTC

P0752 is a Type B DTC.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks.

Reference Information
Schematic Reference

Automatic Transmission Controls Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information.
Special Tools

DT-47825 Control Solenoid Test Plate Kit

Circuit/System Verification

1. Verify that DTCs P0721, P0722, P0723, P0966, P0967, P0969, P0970, P0971, P0973, P0974, P0976, P0977, P2720, P2721, P2728, P2729, or P2730 are not set.

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

2. Perform the Transmission Fluid Check (Transmission Fluid Check).
3. Operate the vehicle in drive from a complete stop to obtain 72 km/h (45 mph), stop the vehicle, turn the ignition Off for at least 30 seconds. Perform this 2 times.

• If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

1. Perform the Line Pressure Check (Line Pressure Check).

• If the pressure is out of specification correct that concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (Control Solenoid Valve and TCM Assembly Solenoid Performance Test).

• If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test (Control Solenoid Valve and TCM Assembly Solenoid Performance Test).

• If the shift solenoid 1 is found to be leaking or stuck ON, replace the control solenoid (w/body and TCM) valve assembly.

• If the control solenoid (w/body and TCM) valve assembly tests normal, inspect the valve body and hydraulic circuits for a leak or a stuck valve.

Repair Instructions

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

Control Module References (Programming and Relearning) for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming