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Door Multiplex Control Unit Input Test

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 Connector A (22P) & B (14P)
    G03662049Courtesy 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. Reconnect the connector and, make these input tests at the connector.
    • 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.
    DOOR MULTIPLEX CONTROL UNIT INPUT TEST - REFERENCE DATA

    Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
    B3 WHT/RED Under all conditions Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    B11 GRN/WHT Under all conditions Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 27 (30 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    B14 BLK Under all conditions Check for voltage to ground:
    There should be less than 1 V.
    • Poor ground (G501)
    • An open in the wire
  5. Disconnect the connector from the door multiplex control unit, and make these input tests at the connector.
DOOR MULTIPLEX CONTROL UNIT INPUT TEST - REFERENCE DATA

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
A5 BRN/BLK Under all conditions Check for continuity between A5 terminal and the under-dash fuse/relay box connector J (21P) No. 4 terminal:
There should be continuity.		 An open in the wire
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