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Recirculation Control Motor Circuit Troubleshooting

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, 2006 Acura TSX, 2005 Acura TSX, and 2004 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check the No. 30 (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.

  2. Disconnect the recirculation control motor 7P connector.
  3. Turn the ignition switch ON (II).
  4. Measure the voltage between the No. 1 terminal of recirculation control motor 7P connector and body ground.
    Fig 1: Measuring Voltage Between No. 1 Terminal Of Recirculation Control Motor 7P Connector And Body Ground
    G05492638Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  - Go to step 5.

    NO  - Repair open in the wire between the No. 30 (7.5 A) 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  ).

    Are the recirculation control motor and linkage OK? 

    YES  - Go to step 7.

    NO  - Replace the recirculation control motor (see RECIRCULATION CONTROL MOTOR TEST  ), or repair the recirculation control linkage or doors.

  7. Disconnect audio-HVAC display panel connector B (16P).
  8. Check for continuity between the No. 10 and No. 11 terminals of audio-HVAC display panel connector B (16P) and body ground individually.
    Fig 2: Checking Continuity Between 10 And 11 Terminals Of Audio-HVAC Display Panel Connector B (16P) And Body Ground
    G05492639Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Repair short to body ground in the wire(s) between the audio-HVAC display panel and the recirculation control motor.

    NO  - Go to step 9.

  9. Turn the ignition switch ON (II), and measure the voltage at the same wires.
    Fig 3: Measuring Voltage Of Connector Terminals
    G05492640Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Are there any voltage? 

    YES  - Repair short to power in the wire(s) between the audio-HVAC display panel and the recirculation control motor. This short may also damage the audio-HVAC display panel. Repair the short to power before replacing the audio-HVAC display panel.

    NO  - Go to step 10.

  10. Turn the ignition switch OFF.
  11. Check for continuity between the following terminals of audio-HVAC display panel connector B (16P) and the recirculation control motor 7P connector.
    16P 7P
    No. 10 No. 5
    No. 11 No. 7
    Fig 4: Checking Continuity Between Terminals Of Audio-HVAC Display Panel Connector B (16P) And Recirculation Control Motor 7P Connector
    G05492641Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Check for loose wire or poor connections at audio-HVAC display panel connector B (16P) and at recirculation control motor 7P connector. If the connections are good, substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, replace the original audio-HVAC display panel.

    NO  - Repair open in the wire(s) between the audio-HVAC display panel and the recirculation control motor.

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