B1207

DTC B1205, DTC indicator J and AUTO or L and AUTO: Climate Control Unit Lost Communication with Gauge Control Module (TACH) (VSP/NE message)

DTC B1206 or DTC indicator F and AUTO: Climate Control Unit Lost Communication with Gauge Control Module (TACH) (ECT message)

DTC B1207 or DTC indicator D and AUTO: Climate Control Unit Lost Communication with Gauge Control Module (TACH) (ILLUMI message)

DTC B1209: Climate Control Unit Lost Communication with Gauge Control Module (TACH) (ILLUMI message)

1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn to ON (II).
3. Do the self-diagnostic with the HDS or climate control unit.
4. Check the DTCs.

Is DTC B1205, J and AUTO or L and AUTO, and/or DTC B1206 or F and AUTO, and/or DTC B1207 or D and AUTO, and/or DTC B1205 indicated?

YES - Go to step 5.

NO - Intermittent failure, check for loose wires or poor connections on the gauge control module (TACH) and climate control unit circuit.

5. Select UNIT INFORMATION in the BODY ELECTRICAL menu.
6. Select CONNECTED UNIT in the UNIT 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.

NO - Go to step 7.

7. Disconnect under-dash fuse/relay box connector Q (16P).
8. Disconnect the gauge control module (TACH) 36P connector.
9. Check for continuity between under-dash fuse/relay box connector Q (16P) No. 6 terminal and the gauge control module (TACH) 36P connector No. 21 terminal.






Is there continuity?

YES - Go to the MICU input test. MICU Input Test

NO - Repair open in the wire between the MICU and the gauge control module (TACH).