B1206

DTC Troubleshooting: B1205 (D and AUTO), B1206 (F and AUTO), B1207 (J and AUTO), B1209 (L and AUTO)

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 MICU (MICU/DOOR SW 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 Function with the HDS Initial Inspection and Diagnostic Overview or the climate control unit Initial Inspection and Diagnostic Overview.

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 B1209 indicated?

YES -

Go to step 5.

NO -

Intermittent failure. Check for loose wires or poor connections on the gauge control module (TACH) and the climate control unit.�

5. Select UNIT INFORMATION in the BODY ELECTRICAL menu.

6. Select CONNECTED UNIT in the UNIT INFORMATION menu.

Is the 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 (TACH) 36P connector.

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





Is there continuity?

YES -

Go to the MICU input test MICU Input Test.�

NO -

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