Circuit/System Verification
- Ignition ON.
- Verify the tachometer sweeps when performing the scan tool Instrument Cluster Gauge Sweep control function.
- If the tachometer does not sweep
Replace the P16 Instrument Cluster
- Go to next step: If the tachometer sweeps
- If the tachometer does not sweep
- Engine running, verify the tachometer display matches the scan tool Engine Speed parameter in the ECM Engine Data List.
- If tachometer display does not match the Engine Speed parameter
Perform Circuit/System Testing.
- Go to next step: If tachometer display matches the Engine Speed parameter
- If tachometer display does not match the Engine Speed parameter
- All OK.