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Control Unit Input Test

WARNING: This page is about a different car, the 2003 Acura 3.2CL, 2002 Acura 3.2CL, and 2001 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Before testing the exterior light control functions, troubleshoot the multiplex control system (see TROUBLESHOOTING ).

    Driver's Multiplex Control Unit: 

  2. Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
  3. Inspect the connector and socket terminals to be sure they are all making good contact.
    • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
    • If the terminals look OK, go to step 4.
    Fig 1: Identifying Fuse/Relay Box Socket Terminals
    G01164987Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 2: Identifying Multiplex Control Unit, Driver's Connector B Terminals (Plugs Into Multiplex Control Unit, Driver)
    G01164988Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 3: Identifying Driver's Under-Dash Fuse/Relay Box Connector E Terminals
    G01164989Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 4: Identifying Driver's Under-Dash Fuse/Relay Box Connector L Terminals
    G01164990Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 5: Identifying Driver's Under-Dash Fuse/Relay Box Connector M Terminals
    G01164991Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. With the driver's multiplex control unit still disconnected, make these input tests at the connector or driver's under-dash fuse/relay box socket.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, go to step 5.
    Fig 6: Driver's Under-Dash Fuse/Relay Box Socket Input Tests (Driver's Multiplex Control Unit Disconnected)
    G01164992Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Reconnect the driver's multiplex control unit to the driver's under-dash fuse/relay box, and perform the following input tests at the appropriate connectors on the driver's under-dash fuse/relay box. For driver's under-dash fuse/relay box connector socket location (see FUSES & CIRCUIT BREAKERS ).
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, go to step 6.
    Fig 7: Driver's Under-Dash Fuse/Relay Box Socket Input Tests (Driver's Multiplex Control Unit Connected)
    G01164993Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Multiplex Control Unit, Door: 

  6. Remove the driver's door panel, and disconnect the 20P connector from the door multiplex control unit.
  7. Inspect the connector and socket terminals to be sure they are all making good contact.
    • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
    • If the terminals look OK, go to step 8.
    Fig 8: Identifying Multiplex Control Unit, Door Connector A Terminals
    G01164994Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Wire side of female terminals

  8. Reconnect the connector to the door multiplex control unit, and make these input tests.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the control unit must be faulty; replace it.
    Fig 9: Door Multiplex Control Unit Input Tests
    G01164995Courtesy of AMERICAN HONDA MOTOR CO., INC.
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