Keyless/Power Door Locks/Security System (Driver's and Passenger's MICU, Door Multiplex Control Unit, and Front Passenger's Power Window Switch) Input Test
Passenger's MICU
  1. Turn the ignition switch to LOCK (0), and remove the passenger's side kick panel.
  1. Disconnect passenger's under-dash fuse/relay box connectors A, E, F, and H.
    NOTE: All connector views are wire side of female terminals.
  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 10 .
  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 11 .
    NOTE: Before testing, make sure the No. 15 (10 A) fuse in the under-hood fuse/relay box.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    H7
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G651)
    • An open in the wire
    A9
    RED
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 1 (AS F/B) (40 A) *1 or (60 A) *2 fuse in the under-hood fuse/relay box
    • Faulty driver's under-dash fuse/relay box
    • An open in the wire
    A14
    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 (LHD model)
    • Faulty passenger's under-dash fuse/relay box (RHD model)
    • An open in the wire
    [E3]
    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
    • An open in the wire
    A35
    BRN
    Ignition switch ON (II)
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 5 (7.5 A) fuse in the driver's under-hood fuse/relay box
    • Faulty driver's under-dash fuse/relay box
    • An open in the wire
    A20
    LT GRN [BLU]
    Connect A14 and A20 (or A38) terminals, and A38 (or A20) terminal to ground.
    Check actuator operation: The front passenger's door lock actuator should unlock (or lock).
    • Faulty front passenger's door lock actuator
    • An open in the wire
    A38
    RED [ORN]
    H27
    RED [ORN]
    Connect A14 and H27 (or H1) terminals, and H1 (or H27) terminal to ground.
    Check actuator operation: The right [left] rear door lock actuator should lock (or unlock).
    • Faulty right [left] rear door lock actuator
    • An open in the wire
    H1
    LT GRN [YEL]

    [ ]:
    RHD model
    *1:
    With ACC
    *2:
    Without ACC

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    [A2] *
    BRN
    A2 terminal to ground momentarily
    Check actuator operation: All door lock actuators should unlock.
    • Poor ground (G501, G502)
    • Faulty super locking unlock relay
    • An open in the wire
    [A3] *
    ORN
    A3 terminal to ground momentarily
    Check actuator operation: Front passenger's and left rear super locking actuators should lock.
    • Faulty left side super locking relay
    • Faulty passenger's super locking actuator
    • Faulty left rear super locking actuator
    • An open in the wire
    [A4] *
    RED
    A4 terminal to ground momentarily
    Check actuator operation: Driver's and right rear super locking actuators should lock.
    • Faulty right side super locking relay
    • Faulty driver's super locking actuator
    • Faulty right rear super locking actuator
    • An open in the wire
    [F2] *
    RED
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No.1 (AS F/B) (40 A) *1 or (60 A) *2 fuse in the under-hood fuse/relay box
    • An open in the wire

    [ ]:
    RHD model
    *:
    With super locking

  1. Reconnect the connectors to the passenger's under-dash fuse/relay box, and 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 12 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    H22 *
    GRY
    Right [left] rear door lock knob switch in UNLOCK
    Measure the voltage to ground: There should be less than 1 V.
    • Poor ground (G651)
    • Faulty right [left]rear door lock knob switch
    • An open in the wire
    Right [left] rear door lock knob switch in LOCK
    Measure the voltage to ground: There should be battery voltage.
    • Faulty right [left]rear door lock knob switch
    • A short to ground in the wire
    H25
    LT GRN
    Right [left] rear door open
    Measure the voltage to ground: There should be less than 1 V.
    • Faulty right [left]rear door switch
    • An open in the wire
    Right [left] rear door closed
    Measure the voltage to ground: There should be more than 5 V.
    • Faulty right [left]rear door switch
    • A short to ground in the wire
    H3
    GRN[BRN]
    Front passenger's door open
    Measure the voltage to ground: There should be less than 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 more than 5 V.
    • Faulty front passenger's door switch
    • A short to ground in the wire

    [ ]:
    RHD model
    *:
    With security