B2983

DTC Troubleshooting: B2983 (M and A/C)

DTC B2983 or DTC indicator M and A/C ON:

A Problem in the Recirculation Control Motor Circuit, Linkage, Door, or Motor

1. Clear the DTC with the HDS.

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

3. Do the Self-Diagnostic Function with the HDS or the climate control unit.

4. Check the DTCs.

Is DTC B2983 or M and A/C ON indicated?

YES -

Go to step 5.

NO -

Intermittent failure. Check for loose wires or poor connections on the recirculation control motor circuit.�

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

6. Test the recirculation control motor Recirculation Control Motor Test.

Is the recirculation control motor OK?

YES -

Go to step 7.

NO -

Replace the recirculation control motor Recirculation Control Motor Replacement, or repair the recirculation control linkage or door.�

7. Disconnect the recirculation control motor 7P connector.

8. Disconnect climate control unit connector A (28P).

9. Check for continuity between the following terminals of climate control unit connector A (28P) and the recirculation control motor 7P connector.









Is there continuity?

YES -

Go to step 10.

NO -

Repair an open in the wire(s) between the climate control unit and the recirculation control motor.�

10. Check for continuity between body ground and climate control unit connector A (28P) terminals No. 3 and No. 5 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the climate control unit and the recirculation control motor.�

NO -

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.�