B1207

DTC Troubleshooting: B1205 (B), B1206 (C), B1207 (D)

DTC B1205 or DTC indicator B:

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

DTC B1206 or DTC indicator C:

Climate Control Unit Lost Communication with Gauge Control Module (coolant temp message)

DTC B1207 or DTC indicator D:

Climate Control Unit Lost Communication with Gauge Control Module (illumination message)

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Do the self-diagnostic function with the HDS or the climate control unit.

4. Check for DTCs.

Is DTC B1205 or B, and/or B1206 or C, and/or B1207 or D indicated?

YES -

Go to step 5.

NO -

Intermittent failure, check for loose wires or poor connections in the gauge control module and in the climate control unit circuit.�

5. Select B-CAN CONTROL UNITS INFORMATION in the BODY ELECTRICAL menu.

6. Select CHECK CONNECTED CONTROL UNITS in the B-CAN CONTROL UNITS INFORMATION menu.

Is gauge control module detected?

YES -

Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit Climate Control Unit Removal/Installation.�

NO -

Go to step 7.

7. Disconnect under-dash fuse/relay box connector Q (16P).

8. Disconnect the gauge control module 32P connector.

9. Check for continuity between under-dash fuse/relay box connector Q (16P) terminal No. 3 and gauge control module 32P connector terminal No. 17.





Is there continuity?

YES -

Go to step 10.

NO -

Repair an open in the wire between the MICU and the gauge control module.�

10. Disconnect the climate control unit 36P connector.

11. Check for continuity between gauge control module 32P connector terminal No. 17 and climate control unit 36P connector terminal No. 6.





Is there continuity?

YES -

Go to the gauge control module input test Gauge Control Module Input Test.

NO -

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