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. |
Circuit/System Description
The instrument cluster displays the engine coolant temperature, vehicle speed and the engine speed based on the information from the engine control module (ECM). The ECM sends appropriate 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, the engine speed, the vehicle speed and the distance travelled, either in kilometers or miles, based on the vehicle requirements.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Instrument Cluster Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that all gages sweep from their low to high position.
- Drive the vehicle, verify the odometer display, the displayed distance counts up while driving.
- If all gages do sweep and the odometer display counts up, replace the K20 Engine Control Module (ECM).
| ⇒ | If any gage does not sweep, replace the P16 Instrument Cluster. |
| ⇒ | If the odometer display does not count up, replace the P16 Instrument Cluster. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for the Instrument Cluster or ECM replacement, setup, and programming
