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Entry Lights Control System (MICU) Input Test

NOTE: Before testing, check for No. 22 (7.5 A) fuse in the under-dash fuse/relay box.
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the under-dash fuse/relay box connectors C, E, G, K, M, N, Q, and W.
    NOTE:
    • All connector views are shown from wire side of female terminals.
    • The illustration shows the RHD models and the black portion shows the lock lever. The lock lever for LHD model is shown as the dashed lines.
  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 5 .
  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 6 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    K10
    BLK
    Under all conditions
    Check for continuity to ground:
    There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    M16
    BLK
    Under all conditions
    Check for continuity to ground:
    There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    N2
    BLK
    Under all conditions
    Check for continuity to ground:
    There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    Q9
    BLK
    Under all conditions
    Check for continuity to ground:
    There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    W1
    YEL
    Ignition switch ON (II)
    Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 60 (50 A) fuse in the under-dash fuse/relay box
    • Faulty ignition switch
    • An open in the wire
    C33
    BLU
    Driver's door open
    Check for continuity to ground:
    There should be continuity
    • Faulty driver's door switch
    • An open in the wire
    Driver's door closed
    Check for continuity to ground:
    There should be no continuity
    • Faulty driver's door switch
    • A short to ground in the wire
    C32
    LT GRN
    Front passenger's door open
    Check for continuity to ground:
    There should be continuity
    • Faulty front passenger's door switch
    • An open in the wire
    Front passenger's door closed
    Check for continuity to ground:
    There should be no continuity
    • Faulty front passenger's door switch
    • A short to ground in the wire
    C32 *2
    LT GRN
    Left rear door or right rear door open
    Check for continuity to ground:
    There should be continuity
    • Faulty left rear door switch
    • Faulty right rear door switch
    • An open in the wire
    Left rear door and right rear door closed
    Check for continuity to ground:
    There should be no continuity
    • Faulty left rear door switch
    • Faulty right rear door switch
    • A short to ground in the wire
    C40 *1
    GRN
    Left rear door open
    Check for continuity to ground:
    There should be continuity
    • Faulty left rear door switch
    • An open in the wire
    Left rear door closed
    Check for continuity to ground:
    There should be no continuity
    • Faulty left rear door switch
    • A short to ground in the wire
    C26 *1
    PNK
    Right rear door open
    Check for continuity to ground:
    There should be continuity
    • Faulty right rear door switch
    • An open in the wire
    Right rear door closed
    Check for continuity to ground:
    There should be no continuity
    • Faulty right rear door switch
    • A short to ground in the wire
    C22
    ORN
    Tailgate open
    Check for continuity to ground:
    There should be continuity
    • Poor ground (G602)
    • Faulty tailgate latch switch
    • An open in the wire
    Tailgate closed
    Check for continuity to ground:
    There should be no continuity
    • Faulty tailgate latch switch
    • A short to ground in the wire

    *1:
    With security
    *2:
    Without security

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    M34
    GRY
    Ignition key inserted into the ignition switch
    Check for continuity to ground:
    There should be continuity
    • Poor ground (G501)
    • Faulty ignition key switch
    • An open in the wire
    Ignition switch in LOCK (0) position, and the ignition key removed from the ignition switch
    Check for continuity to ground:
    There should be no continuity
    • Faulty ignition key switch
    • A short to ground in the wire
    E2
    BRN
    Driver's door lock knob switch in UNLOCK
    Check for continuity to ground:
    There should be continuity
    • Poor ground (G501)
    • Faulty driver's door lock knob switch
    • An open in the wire
    Driver's door lock knob switch in neutral or LOCK
    Check for continuity to ground:
    There should be no continuity
    • Faulty driver's door lock knob switch
    • A short to ground in the wire
    E9
    RED
    Driver's door lock knob switch in LOCK
    Check for continuity to ground:
    There should be continuity
    • Poor ground (G501)
    • Faulty driver's door lock knob switch
    • An open in the wire
    Driver's door lock knob switch in neutral or UNLOCK
    Check for continuity to ground:
    There should be no continuity
    • Faulty driver's door lock knob switch
    • A short to ground in the wire

  1. Reconnect the connectors to the under-dash fuse/relay box, and make these input tests at the connector.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    G7
    BLU
    Ceiling light switch in middle position
    Connect G7 terminal and body ground with a jumper wire:
    The ceiling light should come on.
    • Blown No. 1 (10 A) fuse in the under-dash fuse/relay box
    • Faulty ceiling light
    • Blown bulb
    • An open in the wire
    C18
    PUR
    Under all conditions
    Connect C18 terminal and body ground with a jumper wire:
    The cargo area light should come on.
    • Blown No. 1 (10 A) fuse in the under-dash fuse/relay box
    • Faulty cargo area light
    • Blown bulb
    • An open in the wire