FixVault
Home › Acura › 2003 › 3.2TL Base › Repair and Diagnosis › External Pages › Different car › Section 46 (Interior Lights) › Dash Lights Brightness Controller › Control Unit Input Test

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 dash lights brightness 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 (Driver's Multiplex Control Unit, Connector A) Terminals
    G01165036Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 2: Identifying Multiplex Control Unit, Driver's Connector B Terminals
    G01165037Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 3: Identifying Driver's Under-Dash Fuse/Relay Box Connector J Terminals
    G01165038Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 4: Identifying Driver's Under-Dash Fuse/Relay Box Connector M Terminals
    G01165039Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. With the driver's multiplex control unit still disconnected, make these input tests at the connector and 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 5: Driver's Under-Dash Fuse/Relay Box Socket Input Tests (Connector Disconnected)
    G01165040Courtesy 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.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the driver's multiplex control unit must be faulty; replace it.
    Fig 6: Driver's Under-Dash Fuse/Relay Box Socket Input Tests (Connector Connected)
    G01165041Courtesy of AMERICAN HONDA MOTOR CO., INC.
About FixVault