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Multiplex Control Unit

  1. Remove door panel and door multiplex control unit. See DOOR PANEL  under REMOVAL & INSTALLATION. Disconnect connectors. Inspect connectors and terminals. Check for bent, loose or corroded terminals. Repair connector terminals as necessary and retest system. Go to next step.
  2. Perform driver's door multiplex control unit input tests. See Fig 1 . Repair as necessary and recheck system operation. If door multiplex control unit input tests are okay, go to next step.
  3. Remove passenger's underdash fuse/relay box. See PASSENGER'S UNDERDASH FUSE/RELAY BOX  under REMOVAL & INSTALLATION. Remove passenger's door multiplex control unit from passenger's underdash fuse/relay box. Disconnect connectors. Inspect connectors and terminals. Check for bent, loose or corroded terminals. Repair connector terminals as necessary and retest system. Go to next step.
  4. Perform passenger's multiplex control unit input tests. See Fig 2 . If any test indicates a problem, locate and repair cause as necessary. If passenger multiplex control unit input tests are okay, go to next step.
  5. Turn ignition off. Remove driver's underdash fuse/relay box. See DRIVER'S UNDERDASH FUSE/RELAY BOX  under REMOVAL & INSTALLATION. Remove driver's multiplex control unit from driver's underdash fuse/relay box. Disconnect connectors. Inspect connectors and terminals. Check for bent, loose or corroded terminals. Repair connector terminals as necessary and retest system. Go to next step.
  6. Perform passenger's multiplex control unit input tests. See Fig 3 . If driver's multiplex control unit input tests are okay, go to TROUBLE SHOOTING  .
Fig 1: Driver's Door Multiplex Control Unit Input Test (3.2TL)
G98I00909Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 2: Passenger's Multiplex Control Unit Input Test (3.2TL)
G99G50084Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 3: Driver's Multiplex Control Unit Input Test (3.2TL)
G99H50085Courtesy of AMERICAN HONDA MOTOR CO., INC.