Heating and A/C

DTC Troubleshooting: B1245 (10)

DTC B1245 or DTC indicator 10:

A Short in the Rear Air Mix Control Motor Circuit

1. Clear the DTC by turning the ignition switch to LOCK (0), and then turn to ON (II).

2. Operate the A/C control system in several modes.

3. Check for DTCs using the HDS How to Troubleshoot the Heating and A/C Systems or self-diagnostic function How to Troubleshoot the Heating and A/C Systems.

Is DTC B1245 or 10 indicated?

YES -

Go to step 4.

NO -

Intermittent failure.�

4. Turn the ignition switch to LOCK (0).

5. Test the rear air mix control motor Rear Air Mix Control Motor Test.

Is the rear air mix control motor OK?

YES -

Go to step 6.

NO -

Replace the rear air mix control motor Rear Air Mix Control Motor Replacement.�

6. Disconnect the rear air mix control motor 7P connector.

7. Disconnect A/C control panel connectors A (22P) and B (14P).

8. Check for continuity between body ground and A/C control panel connector A (22P) terminals No. 3 and No. 13 individually, and between body ground and A/C control panel connector B (14P) terminal No. 3.









Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the A/C control panel and the rear air mix control motor.�

NO -

Go to step 9.

9. Check for continuity between A/C control panel connectors A (22P) and B (14P) terminals as follows.





Is there continuity between any of the terminals?

YES -

Repair a short in the wires.�

NO -

Go to step 10.

10. Turn the ignition switch to ON (II), and measure the same terminals for voltage to body ground.









Is there any voltage?

YES -

Repair a short to power in the wire(s) between the A/C control panel and the rear air mix control motor. This short may also damage the A/C control panel. Repair the short to power before replacing the A/C control panel.�

NO -

Check for loose wire or poor connections at A/C control panel connectors A (22P) and B (14P) and at the rear air mix control motor 7P connector. If the connections are good, substitute a known-good A/C control panel, and recheck. If the symptom/indication goes away, replace the original A/C control panel A/C Control Panel Removal/Installation.�