HVAC

DTC Troubleshooting: B1248 (14)

DTC B1248 or DTC indicator 14:

A Problem in the Rear Mode Control Linkage, Doors, or Motor

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 B1248 or 14 indicated?

YES -

Go to step 4.

NO -

Intermittent failure.�

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

5. Test the rear mode control motor Rear Mode Control Motor Test.

Is the rear mode control motor OK?

YES -

Go to step 6.

NO -

Replace the rear mode control motor Rear Mode Control Motor Replacement, or repair the rear mode control linkage or doors.�

6. Disconnect the rear mode control motor 7P connector.

7. Disconnect A/C control panel connector B (14P).

8. Check for continuity between the following terminals of A/C control panel connector B (14P) and the rear mode control motor 7P connector.









Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire(s) between the A/C control panel and the rear mode control motor.�

9. Check for continuity between body ground and A/C control panel connector B (14P) terminals No. 13 and No. 14 individually.





Is there continuity?

YES -

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

NO -

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.�