Driver Efficiency Gauge Inaccurate or Inoperative

Driver Efficiency Gauge Inaccurate or Inoperative

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 Instructionsprovides an overview of each diagnostic category.

Circuit/System Description

The driver efficiency gauge shows when the vehicle is operating at a fuel efficient point. There are several zones on the gauge indicating different levels of efficiency. The gauge shall indicate fuel efficiency when the engine is running and will be set at the minimum scale position when the ignition transitions to a mode other than when the engine is running. The gauge will set at its half scale position when there is a loss of communication. The engine control module (ECM) provides information to the instrument panel cluster (IPC) for the driver efficiency gauge via the serial data circuit.

Reference Information
Schematic Reference

Instrument Cluster Schematics Instrument Cluster Schematics
Connector End View Reference

Component Connector End Views Connector End Views By Name
Description and Operation

Instrument Cluster Description and Operation Instrument Cluster
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

Scan Tool Reference

Control Module References Programming and Relearningfor scan tool information

Circuit/System Verification

Ignition ON, perform the driver efficiency gauge sweep test with the scan tool. Verify that the driver efficiency gauge sweeps from its low to high position.

If the driver efficiency gauge does not sweep from its low to high position, replace the IPC.

Repair Instructions

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

Control Module References Programming and Relearningfor IPC replacement, setup, and programming