Climate Control

DTC Troubleshooting: B1205, B1206, B1207

DTC B1205:

Front Climate Control Unit Lost Communication with Gauge Control Module (VSP/NE message)

DTC B1206:

Front Climate Control Unit Lost Communication with Gauge Control Module (ENGTEMP message)

DTC B1207:

Front Climate Control Unit Lost Communication with Gauge Control Module (ILLUMI message)

1. Push the AUTO button.

Does the climate control turn on?

YES -

Go to step 2.

NO -

Go to front climate control unit power and ground circuits troubleshooting Front Climate Control Unit Power and Ground Circuit Troubleshooting.�

2. Turn the ignition switch to LOCK (0), then turn to ON (II).

3. Turn the climate control system on and operate several functions (A/C ON/OFF, air mix and blend door operations, temperature settings etc.).

4. Check for DTCs using the HDS How to Troubleshoot the Climate Control System.

Is DTC indicated?

YES -

- DTC B1205 indicated: Go to step 5.
- DTC B1206 or B1207 indicated: Go to step 6.

NO -

Intermittent failure, the gauge control module and front climate control unit are OK at this time.�

5. Check for DTCs using the HDS.

Is DTC B1060 indicated?

YES -

Do the gauge control module self-diagnostic mode Initial Inspection and Diagnostic Overview.�

NO -

The front climate control unit is faulty, replace the front climate control unit Front Climate Control Unit Removal/Installation.�

6. Disconnect the front climate control unit 30P connector.

7. Disconnect gauge control module connector A (30P) Service and Repair.

8. Check for continuity between front climate control unit 30P connector terminal No. 7 and gauge control module connector A (30P) terminal No. 25.





Is there continuity?

YES -

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

NO -

Repair an open in the wire between the front climate control unit and the gauge control module.�