Volt

Instrument Cluster Gauges Malfunction

The instrument cluster displays the engine coolant temperature, fuel level, vehicle speed and the engine speed based on the information from the engine control module (ECM). The ECM sends information via a High Speed CAN-Bus signal to the body control module (BCM). The BCM then sends the information via a Low Speed CAN-Bus signal to the instrument cluster to display the engine coolant temperature, fuel level, the engine speed, the vehicle speed and the distance travelled, either in kilometers or miles, based on the vehicle requirements.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Instrument Cluster Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle in Service Mode, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that the instrument cluster performs a screen test sequence.

Note: Since there are no gauges, the instrument cluster will go through a screen test sequence instead of sweeping the gauges.

⇒	If the instrument cluster does not perform the screen test sequence, replace the P16 instrument cluster.

2. Drive the vehicle, verify the gauge values match the values on the scan tool.

⇒	If the values do not match, reprogram the P16 instrument cluster. If the values still do not match, replace the P16 instrument cluster.

3. If all gauges display the correct value, and the odometer display counts up, replace the K20 engine control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for instrument cluster or ECM replacement, programming and setup