Service Information

Volt

DTC P0969-P0971

Diagnostic Instructions

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

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

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

DTC P0969: Pressure Control Solenoid 3 System Performance

DTC P0970: Pressure Control Solenoid 3 Control Circuit Low Voltage

DTC P0971: Pressure Control Solenoid 3 Control Circuit High Voltage

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Clutch Pressure Control Solenoid 3 Control	P0970	P0971	P0971	P0969

Circuit/System Description

The transmission control module (TCM) supplies 12 volts to the clutch pressure control solenoid 3 on the high side driver 1 circuit. The transmission control module controls the clutch 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 variable low and 1-2 reverse clutch when commanded ON and exhausts fluid when commanded OFF. The clutch pressure control solenoid 3 regulates the transmission fluid pressure to the variable low and 1-2 reverse clutch. The clutch pressure control solenoid 3 is part of the control solenoid valve assembly and is not serviced separately.

Conditions for Running the DTC

•	Propulsion system is active.

•	The system voltage is 11-16 V.

Conditions for Setting the DTC

P0969

The transmission control module detects an internal electrical performance malfunction of the clutch pressure control solenoid control circuit for 5 seconds.

P0970

The transmission control module detects an internal low voltage electrical malfunction of the clutch pressure control solenoid control circuit for 1 second.

P0971

The transmission control module detects an internal high voltage electrical malfunction of the clutch pressure control solenoid control circuit for 1 second.

Action Taken When the DTC Sets

•	DTC P0969 is a Type B DTC.

•	DTCs P0970 and P0971 are Type A DTCs.

Conditions for Clearing the DTC

•	DTC P0969 is a Type B DTC.

•	DTCs P0970 and P0971 are Type A DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

Vehicle ON, verify the transmission fluid temperature is between 50-80°C (122-176°F).
Drive the vehicle in order to obtain dual motor or dual motor and ICE mode, observe the scan tool Pressure Control Solenoid Valve 3 Performance Test Status parameters. The reading should display OK.

⇒	If the reading is not within the specified range, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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