DTC B and AUTO
DTC B2983 or DTC indicator B and AUTO: A problem in the Recirculation Control Linkage, Door, or Motor1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn to ON (II).
3. Do the self-diagnostic with the HDS or climate control unit.
4. Check the DTCs.
Is DTC B2983 or B and AUTO indicated?
YES - Go to step 5.
NO - Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the recirculation control motor 7P connector.
7. Disconnect climate control unit connector A (32P).
8. Check for continuity between the following terminals of climate control unit connector A (32P) and the recirculation control motor 7P connector.
Is there continuity?
YES - Go to step 9.
NO - Repair open in the wire(s) between the climate control unit and the recirculation control motor.
9. Check for continuity between body ground and climate control unit connector A (32P) No. 15 and No. 16 terminals individually.
Is there continuity?
YES - Repair short to body ground in the wire(s) between the climate control unit and the recirculation control motor
NO - Go to step 10.
10. Test the recirculation control motor.
Is the recirculation control motor OK?
YES - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.
NO - Replace the recirculation control motor, or repair the recirculation control linkage or door.