HVAC

DTC Troubleshooting: B1244 (7)

DTC B1244 or DTC indicator 7:

An Open in the Rear Air Mix Control Motor Circuit

1. Clear the DTCs with the HDS.

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

3. Do the self-diagnostic function with the HDS or the HVAC control unit.

4. Check for DTCs.

Is DTC B1244 or 7 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, check for loose wires or poor connections in the rear air mix control motor circuit.�

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

6. Test the rear air mix control motor .

Is the rear air mix control motor OK?

YES -

Go to step 7.

NO -

Replace the rear air mix control motor.�

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

8. Disconnect HVAC control unit connector A (24P).

9. Check for continuity between the following terminals of HVAC control unit connector A (24P) and the rear air mix control motor 7P connector.









Is there continuity?

YES -

Check for loose wires or poor connections at HVAC control unit connector A (24P) and at the rear air mix control motor 7P connector. If the connections are good, substitute a known-good HVAC control unit and recheck. If the symptom/indication goes away, replace the original HVAC control unit HVAC Control Unit Removal/Installation.�

NO -

Repair an open in the wire(s) between the HVAC control unit and the rear air mix control motor.�