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Door Multiplex Control Unit Input Test

  1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
  2. Remove the driver's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
  3. Disconnect the 37P connector (A) from the power window master switch (B).
    Fig 1: Identifying 37P Connector And Power Window Master Switch
    G08067611Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. 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 5.
  5. Reconnect the connector to the power window master switch, and do the following input tests:
    • 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.
    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    13 WHT Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 15 (10 A) fuse in the under-hood fuse/relay box
    • An open or high resistance in the wire
    14 LT GRN Ignition switch ON (II), or ignition mode ON Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 16 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • An open or high resistance in the wire
    25 WHT Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box
    • Blown No. 24 (20 A) fuse in the driver's under-dash fuse/relay box
    • An open or high resistance in the wire
    32 BLK In all ignition switch positions or all power modes Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground(G401)
    • An open or high resistance in the ground wire
    37 BLK In all ignition switch positions or all power modes Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground(G402)
    • An open or high resistance in the ground wire
    16 RED Ignition switch ON (II), or ignition mode ON, position 2 switch pressed Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty driving position memory switch
    • Poor ground (G401) or an open in the ground wire
    • An open or high resistance in the wire
    Ignition switch ON (II), or ignition mode ON, position 2 switch released Measure the voltage to ground:
    There should be about 5 V.
    • Faulty driving position memory switch
    • A short to ground in the wire
    17 LT GRN Ignition switch ON (II), or ignition mode ON, position 1 switch pressed Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty driving position memory switch
    • Poor ground (G401) or an open in the ground wire
    • An open or high resistance in the wire
    Ignition switch ON (II), or ignition mode ON, position 1 switch released Measure the voltage to ground:
    There should be about 5 V.
    • Faulty driving position memory switch
    • A short to ground in the wire
    19 ORN Ignition switch ON (II), or ignition mode ON, SET switch pressed Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty driving position memory switch
    • Poor ground (G401) or an open in the ground wire
    • An open or high resistance in the wire
    Ignition switch ON (II), or ignition mode ON, SET switch released Measure the voltage to ground:
    There should be about 5 V.
    • Faulty driving position memory switch
    • A short to ground in the wire
  6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, then disconnect the connector from the power window master switch, and do the following 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 door multiplex control unit must be faulty; replace the power window master switch (see REAR POWER WINDOW SWITCH TEST ).
    NOTE: After replacing the power window master switch, reset the power window control unit (see RESETTING THE POWER WINDOW CONTROL UNIT ).
    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    4 BLU Under all conditions Connect terminals No. 13 and No. 4:
    The driving position memory switch indicator 2 should come on.
    • Faulty driving position memory switch
    • Faulty LED
    • Poor ground(G401) or an open in the ground wire
    • An open or high resistance in the wire
    6 GRN Under all conditions Connect terminals No. 13 and No. 6:
    The driving position memory switch indicator 1 should come on.
    • Faulty driving position memory switch
    • Faulty LED
    • Poor ground (G401) or an open in the ground wire
    • An open or high resistance in the wire
    26 YEL Under all conditions Connect terminals No. 13 and No. 26:
    The driving position memory switch lights should come on.
    • Faulty driving position memory switch
    • Faulty LED
    • Poor ground (G401) or an open in the ground wire
    • An open or high resistance in the wire
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