DTC B2983 or DTC indicator 8: A problem in the Recirculation Control Linkage, Door, or Motor Circuit
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0) and then back to ON (II).
- Do the self-diagnostic function with the HDS (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITH THE HDS ) or the HVAC control unit (see HOW TO USE THE HVAC CONTROL UNIT SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS ).
- Check the DTCs.
Is DTC B2983 or 8 indicated?
YES -Go to step 5.
NO -Intermittent failure, check for loose wires or poor connections in the recirculation control motor circuit.
- Turn the ignition switch to LOCK (0).
- Test the recirculation control motor (see RECIRCULATION CONTROL MOTOR TEST
).
Is the recirculation control motor OK?
YES -Go to step 7.
NO -Replace the recirculation control motor (see RECIRCULATION CONTROL MOTOR REPLACEMENT ), or repair the recirculation control linkage or door.
- Disconnect the recirculation control motor 7P connector.
- Disconnect HVAC control unit connector B (16P).
- Check for continuity between the following terminals of HVAC control unit connector B (16P) and the recirculation control motor 7P connector.
16P: 7P:
No. 5 No. 2
No. 6 No. 1
Fig 1: Checking Continuity Between Terminals Of HVAC Control Unit Connector B (16P) And Recirculation Control Motor 7P ConnectorCourtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Go to step 10.
NO -Repair an open in the wire(s) between the HVAC control unit and the recirculation control motor.
- Check for continuity between body ground and HVAC control unit connector B (16P) terminals No. 5 and No. 6 individually.Fig 2: Checking Continuity Between Body Ground And HVAC Control Unit Connector B (16P) Terminals No. 5 And 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair a short to body ground in the wire(s) between the HVAC control unit and the recirculation control motor.
NO -Substitute a known-good HVAC control unit, and recheck. If the symptom/indication goes away, replace the original HVAC control unit (see HVAC CONTROL UNIT REMOVAL/INSTALLATION ).