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HOMESERVICE MANUALSACURA2008RLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 45 (MULTIPLEX INTEGRATED CONTROL SYSTEM)DOOR MULTIPLEX CONTROL UNIT INPUT TEST
2008 Acura RL

Door Multiplex Control Unit Input Test

2008 Acura RLSECTION Door Multiplex Control Unit Input Test
WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Make sure the ignition switch is OFF before disconnecting the driver's door switch panel.
  1. Remove the driver's door switch panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
  2. Disconnect the connectors from the power window master switch.
    Fig 1: Identifying Door Multiplex Control Unit Connectors Terminals
    G05462622Courtesy of AMERICAN HONDA MOTOR CO., INC.
  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.
  4. With the connectors still disconnected, make these input tests at the connectors.
    • 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.
      WIRE TEST CONDITION CHART

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      A5 BRN/BLK Under-dash fuse/relay box connector J (21P) disconnected Check for continuity between A5 terminal and the under-dash fuse/relay box connector J (21P) Non terminal: There should be continuity. An open in the wire
  5. Reconnect the connectors and, make these input test at the connectors.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the door multiplex control unit must be faulty. Replace the power window master switch.
      WIRE TEST CONDITION CHART

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      B3 WHT/RED Under all conditions Measure the voltage to ground: There should be battery voltage.
      • Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box
      • A short to ground in the wire
      • An open in the wire
      B11 GRN/WHT Under all conditions Measure the voltage to ground: There should be battery voltage.
      • Blown No. 27 (30 A) fuse in the under-dash fuse/relay box
      • A short to ground in the wire
      • An open in the wire
      B14 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V.
      • Poor ground (G501)
      • An open in the wire
RENDER: 1.0x

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