Entry Lights Control System (MICU) Input Test
  1. Turn the ignition switch OFF.
  1. Disconnect the under-dash fuse/relay box connectors E, F, K, R, and T.
    NOTE: All connector views are wire side of female terminals.
  1. With the connectors still disconnected, make these input tests at the connectors.
    • 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 result is not obtained
    E6
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G602) [G652]
    • An open in the wire
    E33
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G651)
    • An open in the wire
    F20
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G401)
    • An open in the wire
    T34
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G503)
    • An open in the wire
    K4
    LT GRN
    Under all conditions (With sunshade: map light switch in DOOR position)
    Attach to ground: The ceiling light and map lights (with sunshade) should come on.
    • Blown No. 17 (7.5 A) fuse in the under-hood fuse/relay box
    • Blown bulb(s)
    • Faulty ceiling light
    • Faulty map light
    • An open in the wire

    [ ]:
    RHD

  1. Reconnect the connectors, then make these input tests at the connector.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    E3
    LT GRN
    Passenger's door open
    Check for voltage to ground: There should be less than 1 V.
    • Faulty passenger's door switch
    • An open in the wire
    Passenger's door closed
    Check for voltage to ground: There should be 5 V or more.
    • Faulty passenger's door switch
    • A short to ground in the wire
    E37
    GRN
    Driver's door open
    Check for voltage to ground: There should be less than 1 V.
    • Faulty driver's door switch
    • An open in the wire
    Driver's door closed
    Check for voltage to ground: There should be 5 V or more.
    • Faulty driver's door switch
    • A short to ground in the wire
    R6
    PNK
    Ignition key inserted into the ignition switch
    Check for voltage to ground: There should be less than 1 V.
    • Poor ground (G403)
    • Faulty ignition key switch
    • An open in the wire
    Ignition switch OFF and ignition key removed from the ignition switch
    Check for voltage to ground: There should be 5 V or more.
    • Faulty ignition key switch
    • A short to ground in the wire
    T23
    WHT
    Driver's door lock knob switch unlocked
    Check for voltage to ground: There should be less than 1 V.
    • Poor ground (G501)
    • Faulty driver's door lock knob switch
    • An open in the wire
    Driver's door lock knob switch locked
    Check for voltage to ground: There should be 5 V or more.
    • Faulty driver's door lock knob switch
    • A short to ground in the wire
    T24
    LT GRN
    Driver's door lock knob switch locked
    Check for voltage to ground: There should be less than 1 V.
    • Poor ground (G501)
    • Faulty driver's door lock knob switch
    • An open in the wire
    Driver's door lock knob switch unlocked
    Check for voltage to ground: There should be 5 V or more.
    • Faulty driver's door lock knob switch
    • A short to ground in the wire