1000 - 1999: 1422

1422-00 NO COMMUNICATION FROM INSTRUMENT CLUSTER





When Monitored and Set Condition

- When Monitored: With the ignition on.
- Set Condition: Serial Communication K1 failure between the A/C Heater Control Module and the Instrument Cluster.





For a complete HVAC Circuit Diagram, HVAC Schematics and Diagrams.

Diagnostic Test

1. MEASURE THE RESISTANCE OF THE SERIAL COMMUNICATION K1 CIRCUIT




Turn the ignition off.
Disconnect the Instrument Cluster harness connector.

NOTE: Check connector - Clean/repair as necessary.

Disconnect the A/C Heater Control Module harness connector.

NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the Serial Communication K1 circuit from the Instrument Cluster harness connector to the A/C Heater Control Module harness connector.
Is the resistance below 5.0 ohms?

Yes

- Replace the A/C Heater Control Module. Removal.
- Perform BODY VERIFICATION TEST. Body Verification Test

No

- Repair the Serial Communication K1 circuit for an open.
- Perform BODY VERIFICATION TEST. Body Verification Test