LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2003 >> MDX Base >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Windows >> Control Unit Input Test >> Passenger's Unit
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Passenger's Unit

  1. Before testing the power window control functions, troubleshoot the multiplex control system (see TROUBLESHOOTING ).
  2. Remove the passenger's multiplex control unit from the passenger's under-dash fuse/relay box, and disconnect its connector.
  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.
      Fig 1: Identifying Passenger's Under-Dash Fuse/Relay Socket
      G03642335Courtesy of AMERICAN HONDA MOTOR CO., INC.
      Fig 2: Identifying Passenger's Under-Dash Fuse/Relay Box Connector C
      G03642336Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. With the passenger's multiplex control unit still disconnected, make these input tests at the passenger's under-dash fuse/relay box socket.
    • 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 1 in DRIVER'S UNIT  .
      CONTROL UNIT INPUT TEST (PASSENGER'S UNIT)

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      A24 Fuse/relay box socket Under all conditions Check for voltage to ground: There should be battery voltage.
      • Blown No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box
      • Faulty passenger's under-dash fuse/relay box
      A12 Fuse/relay box socket Jump A12 to battery voltage The power window relay should make a click sound and there should be 12 V to ground at fuses 7, 8 and 16.
      • Faulty power window relay
      • Poor ground (G651)
      • Blown No. 51 (40 A) fuse in the under-hood fuse/relay box
      • An open in the wire
      A8 Fuse/relay box socket Under all conditions Check for continuity to ground: There should be continuity.
      • Poor ground (G651)
      • An open in the wire
      A19 Fuse/relay box socket With power window main switch ON, jump A12 to battery voltage Check the front passenger's window motor operation: The window should go down.
      • Poor ground (G601, G651)
      • Blown No. 8 (20 A) fuse in the passenger's under-dash fuse/relay box
      • Faulty power window master switch
      • Faulty front passenger's window switch
      • Faulty window motor
      • An open in the wire
      A18
      A12      		 Fuse/relay box socket With power window main switch ON, jump A18 and A12 to battery voltage Check the front passenger's window motor operation: The window should go up.
      A7
      A12      		 YEL/GRN With power window main switch ON, jump A7 and A12 to battery voltage Check the right rear window motor operation: The window should go down.
      • Poor ground (G601, G651)
      • Blown No. 16 (20 A) fuse in the passenger's under-dash fuse/relay box
      • Faulty power window master switch
      • Faulty right rear window switch
      • Faulty window motor
      • An open in the wire
      A6 YEL With power window main switch ON, jump A6 and A12 to battery voltage Check the right rear window motor operation: The window should go up.
      C16(1) GRN Front passenger's door open Check for voltage to ground: There should be 1 V or less.
      • Faulty passenger's door switch
      • An open in the wire
      • A short to ground
      Front passenger's door closed Check for voltage to ground: There should be 5 V or more.
      (1) Reconnect the passenger's multiplex control unit to the passenger's under-dash fuse/relay box.
scientia non olet · About LEMON Manuals