P1762

DTC P1762

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 P1762
- Transmission Mode Switch Signal Message Counter Incorrect

Circuit/System Description

The ECM monitors the state of the drive mode switch signal message from the body control module (BCM), over the serial data circuits. The ECM uses this message to determine the following driver selected mode of operation:

* Normal
* Sport
* Mountain

Conditions for Running the DTC

The propulsion system is active.

Conditions for Setting the DTC

The ECM has detected a drive mode signal rolling count error for 0.8 seconds.

Action Taken When the DTC Sets

DTC P1762 is a Type C DTC.

Conditions for Clearing the DTC

DTC P1762 is a Type C DTC.

Diagnostic Aids

When attempting to set ECM serial data DTCs, run the vehicle in propulsion system active mode for at least 1 minute, and then shut the vehicle off for 30 seconds. Following this procedure will allow for a complete ECM shutdown.

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

Run the vehicle in propulsion system active mode for 1 minute, then vehicle OFF for 30 seconds.

The DTC should not reset.

Circuit/System Testing

1. Verify DTC P1824, P182A-P182F, P1838, or P1839 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. If the DTC is set, program the K20 ECM. If the DTC resets, replace the K20 ECM.

Repair Instructions

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

* Control Module References Programming and Relearning for ECM replacement, programming and setup.
* Perform the Reset Transmission Adapts Programming and Relearning following all transmission related repairs.