Heating and Air Conditioning

DTC B1205: A/C Control Panel Lost Communication with Gauge Control Module (VSP/NE message)

DTC B1206: A/C Control Panel Lost Communication with Gauge Control Module (ENGTEMP message)

DTC B1207: A/C Control Panel Lost Communication with Gauge Control Module (ILLUMI message)

1. Turn the ignition switch OFF then ON.
2. Turn the A/C control system on and operate several functions (A/C ON/OFF, air mix and blend door operations, temperature settings etc.).
3. Check for DTCs using the HDS.

Is DTC indicated?

YES -
- DTC B1205 indicated: Go to step 4.
- DTC B1206 or B1207 indicated: Go to step 5.

NO - Intermittent failure, the gauge control module and A/C control panel are OK at this time.

4. Check for DTCs using the HDS.

Is DTC B1060 indicated?

YES - Perform the gauge control module self test procedure. Initial Inspection and Diagnostic Overview

NO - The A/C control panel is faulty, replace the A/C control panel.

5. Disconnect the A/C control panel connector A (22P).
6. Remove the gauge control module.




7. Check for continuity between the No. 10 terminal of A/C control panel connector A (22P) and the No. 25 terminal of the gauge control module 30P connector.

Is there continuity?

YES - Check for loose wire or poor connections at A/C control panel connector A (22P) and at the gauge control module 30P connector. If the connections are good, substitute a known-good A/C control panel and/or gauge control module, and recheck. If the symptom/indication goes away, replace the original A/C control panel and/or gauge control module.

NO - Repair open in the wire between the A/C control panel and the gauge control module.