B1205

DTC Troubleshooting: B1205 (H)

DTC B1205 or DTC indicator H:

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

NOTE: If DTC B1205 is detected with HDS, it is not necessary to do step 1.

1. Check the sensor input display mode, and select "evaporator temperature" according to the table.

NOTE: This indication by segment lit on digital segments is assigned for 2 failure causes that it is necessary to decide which one is a true cause. If there is a failure in the sensor or motor, a value corresponded to the sensor or motor in the Sensor Input Display Mode is displayed as "Er", which serves to specify which is a true cause.

Is sensor value indicated "Er"?

YES -

Go to troubleshooting DTC B1232 or DTC indicator H B1232

NO -

Go to step 2

2. Clear the DTC with the HDS.

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

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

5. Check for DTCs.

Is DTC B1205 or H indicated?

YES -

Go to step 6

NO -

The system is OK at this time, check for loose wires or poor connections on the gauge control module and climate control unit circuit.�

6. Check for DTCs with the HDS.

Are DTC B1008, B1011, B1032, B1205, and B1906 also indicated?

YES -

Go to step 7.

NO -

The system is OK at this time, check for loose wires or poor connections on the gauge control module and climate control unit circuit.�

7. Select UNIT INFORMATION in the BODY ELECTRICAL menu.

8. Select CONNECTED UNIT in the UNIT INFORMATION menu.

Is gauge control module detected?

YES -

Substitute a known-good gauge control module, and recheck. If the symptom/indication goes away, replace the gauge control module Service and Repair.�

NO -

Go to step 9.

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

10. Disconnect the gauge control module 36P connector.

11. Check for continuity between under-dash fuse/relay box connector Q (16P) terminal No. 6 and gauge control module 36P connector terminal No. 30 .





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 the MICU and the gauge control module.�