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Home >> Acura >> 2009 >> RL >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Interior/Illumination Lights >> Entry Lights Control System >> Control Unit Input Test >> Front Passenger's MPCS Unit
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Front Passenger's MPCS Unit

  1. Turn the ignition switch to LOCK (0).
  2. Remove the front passenger's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).
  3. Disconnect front passenger's MPCS unit connector A (28P).
    Fig 1: Identifying Front Passenger's MPCS Unit Connector A (28P)
    G06162853Courtesy 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. With the connector still disconnected, do 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  6.
    WIRE TEST CONDITION REFERENCE TABLE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    A4 GRY Driver's under-dash fuse/ relay box connector X (39P) and right rear power window switch 14P connector disconnected Check for continuity between terminal A4 and driver's under-dash fuse/relay box connector X (39P) terminal No. 15:
    There should be continuity.
    • Faulty passenger's under-dash fuse/relay box
    • An open in the wire
    Check for continuity to ground:
    There should be no continuity.
    • Faulty passenger's under-dash fuse/relay box
    • A short to ground in the wire
  6. Reconnect the connector to the front passenger's MPCS unit, and do these input tests at the connector.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    WIRE TEST CONDITION REFERENCE TABLE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    A2 WHT Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 15 (40 A) fuse in the under-hood fuse/relay box
    • Blown No. 7 (10 A) fuse in the driver's under-dash fuse/relay box
    • Faulty driver's under-dash fuse/relay box
    • Faulty passenger's under-dash fuse/relay box
    • An open in the wire
    A28 LT GRN Front passenger's door open Measure the voltage to ground:
    There should be less than 0.1 V.
    • Faulty front passenger's door switch
    • An open in the wire
    Front passenger's door closed Measure the voltage to ground:
    There should be 5 V or more.
    • Faulty front passenger's door switch
    • A short to around in the wire
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