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Home >> Acura >> 2004 >> TL Standard >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System >> Recirculation Control Motor Circuit Troubleshooting
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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.
  2. Disconnect the recirculation control motor 5P connector.
  3. Turn the ignition switch ON (II).
  4. Measure the voltage between the No. 5 terminal of the recirculation control motor 5P connector and body ground.
    Fig 1: Measure Voltage Between No. 5 Terminal Of Recirculation Control Motor 5P Connector & Body Ground
    G03661866Courtesy 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 (7.5 A) fuse in the under-dash fuse/relay box and the recirculation control motor.
  5. Turn the ignition switch OFF.
  6. (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 climate control unit connector A (20P).
  8. Check for continuity between the No. 9 and No. 19 terminals of climate control unit connector A (20P) and body ground individually.
    Fig 2: Checking Continuity Between No. 9 & No. 19 Terminals Of Climate Control Unit Connector A (20P)
    G03661867Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair any short to body ground in the wire(s) between the climate control unit and the recirculation control motor.
    2. NO  - Go to step  9.
  9. Turn the ignition switch ON (II), and check the same wires for voltage.
    Fig 3: Turning Ignition Switch ON (II) & Checking Same Wires For Voltage
    G03661868Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there any voltage? 

    1. YES  - Repair any 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.
    2. NO  - Go to step  10.
  10. Turn the ignition switch OFF.
  11. Check for continuity between the following terminals of climate control unit connector A (20P) and the recirculation control motor 5P connector.
    CONNECTOR SPECIFICATION

    20P: 5P:
    No. 9 No. 1
    No. 19 No. 2
    Fig 4: Check Continuity Between Following Terminals Of Climate Control Unit Connector A (20P) & Recirculation Control Motor 5P Connector
    G03661869Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Check for loose wires or poor connections at climate control unit connector A (20P) and at the recirculation control motor 5P 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.
    2. NO  - Repair any open in the wire(s) between the climate control unit and the recirculation control motor.
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