P0797

DTC P0796 or P0797

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 Descriptors
DTC P0796
- Pressure Control Solenoid 3 - Stuck Off

DTC P0797
- Pressure Control Solenoid 3 - Stuck On

Circuit/System Description

The clutch pressure control solenoid 3 is part of the control solenoid valve assembly and is not serviced separately. The transmission control module (TCM) supplies 12 volts to the clutch pressure control solenoid 3 on the high side driver 1 circuit. The TCM controls the pressure control solenoid 3 through the clutch pressure control solenoid 3 control circuit. The normally high clutch pressure control solenoid 3 controls fluid to the following components:

* Variable low 1-2 reverse clutch
* Drive motor 2 cooling

Conditions for Running the DTC

P0796 or P0797
* Shift solenoid valve 1 is not in a transition state.
* The transmission line pressure is greater than 325 kpa (47 psi).

P0796

The clutch pressure control solenoid 3 commanded pressure is greater than 1800 kpa (261 psi) for up to 5 seconds depending on transmission temperature.

P0797

The clutch pressure control solenoid 3 commanded pressure is less than 5 kpa (1 psi) for up to 5 seconds depending on transmission temperature.

Conditions for Setting the DTC

P0796 - Condition 1

The clutch pressure control solenoid 3 commanded pressure is 1800 kpa (261 psi) and the transmission fluid pressure switch state is Low for 30 seconds.

P0796 - Condition 2

The clutch pressure control solenoid 3 commanded pressure is 1800 kpa (261 psi) and the transmission fluid pressure switch 5 state is Low for 2 seconds greater than 5 times during a key cycle.

P0797 - Condition 1

The clutch pressure control solenoid 3 commanded pressure is 5 kpa (1 psi) and the transmission fluid pressure switch 5 state is High for 30 seconds.

P0797 - Condition 2

The clutch pressure control solenoid 3 commanded pressure is 5 kpa (1 psi) and the transmission fluid pressure switch 5 state is High for 2 seconds greater than 5 times during a key cycle.

Action Taken When the DTC Sets

* DTC P0796 is a Type B and DTC P0797 is a Type A DTC.
* The TCM commands 450 kPa (65 psi) line pressure.
* The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

DTC P0796 is a Type B and DTC P0797 is a Type A DTC.

Diagnostic Aids

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.

Reference Information
Schematic Reference

Automatic Transmission Controls Schematics Electrical Diagrams
Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
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 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 (DTC) List - Vehicle.

2. Perform the Line Pressure Check Line Pressure Check.
3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test.
5. Inspect the control valve body assembly for sticking valves, damage, scored bores, or debris. Refer to Control Valve Body Diagnostic Inspection Control Valve Body Diagnostic Inspection.

• If a concern if found in the valve body, repair or replace the valve body as necessary.

6. Verify no DTCs P079A or P07A3 after repair.

Component Testing

1. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test.

Repair Instructions

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

* Control Valve Body Diagnostic Inspection Control Valve Body Diagnostic Inspection.
* 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.