Power Windows (Door Multiplex Control Unit) Input Test
  1. Disconnect the 37P connector (A) from the door power window master switch (B).
  1. 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 .
  1. With the connector still disconnected, 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 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    32
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    37
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    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
    • Faulty driver's under-dash fuse/relay box
    • [Faulty passenger's under-dash fuse/relay box]
    • An open in the wire
    14
    LT GRN
    Ignition switch ON (II)
    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
    • Faulty driver's under-dash fuse/relay box
    • An open in the wire
    25
    WHT [GRN]
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 24 (20 A) fuse in the driver's under-dash fuse/relay box
    • Faulty driver's under-dash fuse/relay box
    • An open in the wire
    12
    YEL
    Connect No. 25 and No. 24 (or No. 12) terminals, and No. 37 and No. 12 (or No. 24) terminals with jumper wires.
    Check driver's power window motor operation:The driver's power window should open (or close)
    • Faulty driver's power window motor
    • An open in the wire
    24
    GRN
    27
    BLU [BLK]
    Disconnect the front passenger's power window switch 37P connector.
    Check for continuity between the No. 27 terminal and the front passenger's power window switch 37P connector No. 29 terminal: There should be continuity.
    An open in the wire
    27 *2
    BLU [BLK]
    Disconnect the left rear power window switch 14P connector.
    Check for continuity between the No. 27 terminal and the left rear power window switch 14P connector No. 12 terminal: There should be continuity.
    An open in the wire
    27 *2
    BLU [BLK]
    Disconnect the right rear power window switch 14P connector.
    Check for continuity between the No. 27 terminal and the right rear power window switch 14P connector No. 12 terminal: There should be continuity.
    An open in the wire

    [ ]:
    RHD model
    *2:
    With all power windows AUTO UP/AUTO DOWN function

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    23 * (LHD model)
    GRN
    Connect No. 25 and No. 36 (or No. 23) terminals.
    Check left rear power window motor operation:The left rear power window should open (or close).
    • Poor ground (G601)
    • Faulty left rear power window switch
    • Faulty left rear power window motor
    • An open in the wire
    36 * (LHD model)
    LT BLU
    23 (RHD model)
    GRN
    Ignition switch ON (II), connect No. 25 and No. 36 (or No. 23) terminals, and No. 37 and No. 23 (or No. 36) terminals with jumper wires.
    Check left rear power window motor operation:The left rear power window should open (or close).
    • Faulty passenger's under-dash fuse/relay box
    • Poor ground (G651)
    • Faulty left rear power window switch
    • Faulty left rear power window motor
    • An open in the wire
    36 (RHD model)
    LT BLU
    21 * (LHD model)
    LT BLU
    Connect No. 25 and No. 34 (or No. 21) terminals.
    Check right rear power window motor operation: The right rear power window should open (or close).
    • Faulty passenger's under-dash fuse/relay box
    • Poor ground (G651)
    • Faulty right rear power window switch
    • Faulty right rear power window motor
    • An open in the wire
    34 * (LHD model)
    LT GRN
    21 (RHD model)
    LT BLU
    Connect No. 25 and No. 34 (or No. 21) terminals.
    Check right rear power window motor operation: The right rear power window should open (or close).
    • Poor ground (G601)
    • Faulty right rear power window switch
    • Faulty right rear power window motor
    • An open in the wire
    34 (RHD model)
    LT GRN
    26 *
    PNK
    Ignition switch ON (II), connect No. 14 and No. 26 terminals with a jumper wire.
    Check left and right rear power window switch lights:The left and right rear power window switch lights should come on.
    • Faulty LED
    • Poor ground (G601, G651)
    • Faulty left or right rear power window switch
    • An open in the wire

    *:
    Without all power windows AUTO UP/AUTO DOWN function

  1. Reconnect the connector to the door multiplex control unit, turn the ignition switch ON (II), 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, the door multiplex control unit is faulty; replace the power window master switch.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    3
    PUR
    Ignition switch ON (II)
    Measure the voltage to ground: There should be battery voltage.
    • Faulty door multiplex control unit
    • A short to ground in the wire
    20
    ORN
    Ignition switch ON (II), and driver's power window moving up or down
    Measure the voltage between the No. 20 and No. 37 terminals: There should be 0 V−about 5 V−0 V−about 5 V repeatedly (a digital voltmeter should read about 2.5 V while the window moves).
    • Faulty door multiplex control unit
    • Faulty driver's power window motor
    • An open in the wire
    • A short to ground in the wire
    22
    PNK
    Ignition switch ON (II), and driver's power window moving up or down
    Measure the voltage between the No. 22 and No. 37 terminals: There should be 0 V−about 5 V−0 V−about 5 V repeatedly (a digital voltmeter should read about 2.5 V while the window moves).
    • Faulty door multiplex control unit
    • Faulty driver's power window motor
    • An open in the wire
    • A short to ground in the wire