P0973

DTC P0973 or P0974

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 P0973

-
Shift Solenoid (SS) 1 Control Circuit Low Voltage

DTC P0974

-
Shift Solenoid (SS) 1 Control Circuit High Voltage

Diagnostic Fault Information






Circuit/System Description

The control solenoid valve assembly supplies 12 volts to shift solenoid 1 on the high side driver 1 circuit. The control solenoid valve assembly controls the normally closed shift solenoid 1 on the shift solenoid 1 control circuit. The shift solenoid 1 is part of the control solenoid valve assembly and is not serviced separately.

Conditions for Running the DTC

The system voltage is 11-16 V.

Conditions for Setting the DTC

P0973

The control solenoid valve assembly detects an internal low voltage electrical malfunction of the shift solenoid 1 control circuit for 1 second.

P0974

The control solenoid valve assembly detects an internal high voltage electrical malfunction of the shift solenoid 1 control circuit for 1 second.

Action Taken When the DTC Sets

DTCs P0973 and P0974 are Type A DTCs.

Conditions for Clearing the DTC

DTCs P0973 and P0974 are Type A DTCs.

Diagnostic Aids

This fault may set transmission overtemperature DTCs.

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.

Circuit/System Verification

1. Vehicle ON, verify the transmission fluid temperature is between 50-80°C (122-176°F).

2. Drive the vehicle, observe the scan tool Shift Solenoid Valve 1 Control Circuit 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 Verification Tests after completing the diagnostic procedure.

* 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.