P1762

DTC P1762
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 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

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

Scan Tool Reference
Control Module References 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
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.
If the DTC is set, program the K20 ECM. If the DTC resets, replace the K20 ECM.

Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM replacement, programming and setup.
Perform the Reset Transmission Adapts following all transmission related repairs.