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Recirculation Control Motor Circuit Troubleshooting

  1. Check the No. 16 (7.5 A) fuse in the under-dash fuse/relay box.

    Is the fuse OK? 

    1. YES  -Go to step 2.
    2. NO  -Replace the fuse, and recheck.
  2. Disconnect the recirculation control motor 4P connector.
  3. Turn the ignition switch ON (II).
  4. Measure the voltage between the No. 1 terminal of the recirculation control motor 4P connector and body ground.
    Fig 1: Measuring Voltage Between No. 1 Terminal Of Recirculation Control Motor 4P Connector And Body Ground
    G03682690Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES  -Go to step 5.
    2. NO  -Repair open in the wire between the recirculation control motor and the No. 16 (7.5 A) fuse in the under-dash fuse/relay box.
  5. Turn the ignition switch OFF.
  6. Test the recirculation control motor (see RECIRCULATION CONTROL MOTOR TEST ).

    Is the recirculation control motor OK ? 

    1. YES  -Go to step 7.
    2. NO  -Go to step  12.
  7. Disconnect heater control panel connector B (22P).
  8. Check for continuity between the No. 18 and No. 19 terminals of heater control panel connector B (22P) and body ground individually.
    Fig 2: Checking For Continuity Between No. 18 And No. 19 Terminals
    G03682691Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  -Repair any short to body ground in the wire(s) between the heater control panel and the recirculation control motor.
    2. NO  -Go to step 9.
  9. Turn the ignition switch ON (II), and check the same terminals for voltage.
    Fig 3: Checking Terminals For Voltage
    G03682692Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there any voltage? 

    1. YES  -Repair any short to power in the wire(s) between the heater control panel and the recirculation control motor. This short may also damage the heater control panel. Repair the short to power before replacing the heater control panel.
    2. NO  -Go to step 10.
  10. Turn the ignition switch OFF.
  11. Check for continuity between the following terminals of heater control panel connector B (22P) and the recirculation control motor 4P connector.
    TERMINALS FOR CONTINUITY CHECK

    22P: 4P:
    No. 18 No. 4
    No. 19 No. 2
    Fig 4: Checking For Continuity Between Terminals
    G03682693Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  -Check for loose wires or poor connections at heater control panel connector B (22P) and at recirculation control motor 4P connector. If the connections are good, substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.
    2. NO  -Repair any open in the wire(s) between the heater control panel and the recirculation control motor.
  12. Remove the recirculation contol motor (see RECIRCULATION CONTROL MOTOR TEST ).
  13. Check the recirculation control linkage and door for smooth movement.

    Do the recirculation control linkage and door move smoothly? 

    1. YES  -Replace the recirculation control motor.
    2. NO  -Repair the recirculation control linkage or door.
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