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Recirculation Control Motor Circuit Troubleshooting

  1. Check the No. 30 (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. If the fuse blows again, check for a short in the No. 30 (7.5 A) fuse circuit.
  2. Disconnect the recirculation control motor 7P connector.
  3. Turn the ignition switch ON (II).
  4. Measure the voltage between the recirculation control motor 7P connector terminal No. 1 and body ground.
    Fig 1: Measuring The Voltage Between The Recirculation Control Motor 7P Connector Terminal No. 1 And Body Ground
    G03690813Courtesy 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 No. 30 fuse in the under-dash fuse/relay box and the recirculation control motor.
  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  - Replace the recirculation control motor (see RECIRCULATION CONTROL MOTOR TEST  ), or repair the recirculation control linkage or doors.
  7. Disconnect the HVAC control unit 30P connector.
  8. Check for continuity between body ground and the HVAC control unit 30P connector terminals No. 13 and No. 14 individually.
    Fig 2: Checking Continuity Between Body Ground And The HVAC Control Unit 30P Connector Terminals No. 13 And No. 14
    G03690814Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair any short to body ground in the wire(s) between the HVAC control unit 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 to body ground.
    Fig 3: Checking HVAC Control Unit Connector Terminals 13 And 14 For Voltage To Body Ground
    G03690815Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there any voltage? 

    1. YES  - Repair any short to power in the wire(s) between the HVAC control unit and the recirculation control motor. This short may also damage the HVAC control unit. Repair the short to power before replacing the HVAC control unit.
    2. NO  - Go to step 10.
  10. Turn the ignition switch OFF.
  11. Check for continuity between the following terminals of the HVAC control unit 30P connector and the recirculation control motor 7P connector.
    CHECKING CONTINUITY REFERENCE DATA (7 OF 7)

    30P: 7P:
    No. 13 No. 7
    No. 14 No. 5
    Fig 4: Checking Continuity Between The Terminals Of The HVAC Control Unit 30P Connector And The Recirculation Control Motor 7P Connector
    G03690816Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Check for loose wires or poor connections at the HVAC control unit 30P connector and at the recirculation control motor 7P connector. If the connections are good, substitute a known-good HVAC control unit, and recheck. If the symptom /indication goes away, replace the original HVAC control unit.
    2. NO  - Repair any open in the wire(s) between the HVAC control unit and the recirculation control motor.
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