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Recirculation Control Motor Circuit Troubleshooting

  1. Check the No. B10(7.5 A) fuse in the under-dash fuse/relay box.

    Is the fuse OK? 

    YES  -Go to step  2.

    NO  -Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. B10 (7.5 A) fuse circuit.

  2. Disconnect the recirculation control motor 7P connector.
  3. Turn the ignition switch to ON (II).
  4. Measure the voltage between recirculation control motor 7P connector terminal No. 7 and body ground.
    Fig 1: Measuring Voltage Between Recirculation Control Motor 7P Connector Terminal No. 7 And Body Ground
    G06953660Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  5.

    NO  -Repair an open in the wire between the No. B10 (7.5 A) fuse in the under-dash fuse/relay box and the recirculation control motor.

  5. Turn the ignition switch to LOCK (0).
  6. 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 MODE CONTROL MOTOR REPLACEMENT  ), or repair the recirculation control linkage or door.

  7. Disconnect the climate control unit 36P connector.
  8. Check for continuity between body ground and climate control unit 36P connector terminals No. 27 and No. 28 individually.
    Fig 2: Checking Continuity Between Body Ground And Climate Control Unit 36P Connector Terminals No. 27 And No. 28
    G06953661Courtesy of AMERICAN HONDA MOTOR CO., INC.

    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  -Go to step  9.

  9. Turn the ignition switch to ON (II), and check the same terminals for voltage to body ground.
    Fig 3: Checking Voltage Between Climate Control Unit 36P Connector Terminals And Body Ground
    G06953662Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there any voltage? 

    YES  -Repair a short to power in the wire(s) between the climate control unit and the recirculation control motor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit.

    NO  -Go to step  10.

  10. Turn the ignition switch to LOCK (0).
  11. Check for continuity between the following terminals of the climate control unit 36P connector and the recirculation control motor 7P connector.

    36P: 7P:

    No. 27 No. 1

    No. 28 No. 3

    Fig 4: Checking Continuity Between Climate Control Unit 36P Connector Terminals And Recirculation Control Motor 7P Connector Terminals
    G06953663Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Check for loose wires or poor connections at the climate control unit 36P connector and at the recirculation control motor 7P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit (see CLIMATE CONTROL UNIT REMOVAL/INSTALLATION  ).

    NO  -Repair an open in the wire(s) between the climate control unit and the recirculation control motor.

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