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Keyless/Power Door Locks/Security System (MICU) Input Test

NOTE:
  • Before testing, make sure the turn signal/hazard warning lights work properly.
  • Before testing, check the No. 1 (10 A), No. 20 (15 A), No. 22 (7.5 A), No. 27 (30 A), No. 35 (10 A), No. 36 (15 A), No. 45 (15 A or 20 A), No. 49 (15 A), No. 50 (15 A), and No. 60 (50 A) fuses in the under-dash fuse/relay box.
  • There are two pairs of fuses in the same circuit (No. 35 and No. 49 fuses, No. 36 and No. 50 fuses). If one fuse is brown, make sure to check another fuse in the same circuit. If necessary, replace the damaged fuse(s).
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect under-dash fuse/relay box connectors A, B, C, E, F, K, M, N, Q, R, and W.
    NOTE:
    • All connector views are shown from wire side of female terminals.
    • The illustration shows the RHD model 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
    Q9
    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
    F1 *2
    YEL
    Connect the battery positive terminal to F1 (F2) terminal, and F2 (F1) terminal to body ground
    Check actuator operation: The driver's door lock actuator should unlock (or lock).
    • Faulty driver's door lock actuator
    • An open in the wire
    F2 *2
    PNK
    F2 *3
    PNK
    • Reconnect connector K to the under-dash fuse/relay box
    • Connect F2 terminal to body ground
    • Connect R13 terminal to body ground momentarily
    Check actuator operation: The driver's door lock actuator should unlock.
    • Faulty driver's door lock actuator
    • Faulty driver's door unlock relay
    • Poor ground (G501)
    • An open in the wire
    R13 *3
    BRN
    K5
    LT BLU
    Connect the battery positive terminal to K5 (K6) terminal, and K6 (K5) terminal to body ground
    Check actuator operation: The front passenger's door lock actuator should lock (or unlock).
    • Faulty front passenger's door lock actuator
    • An open in the wire
    K6
    YEL
    C35
    PNK
    Connect the battery positive terminal to C35 (C36) terminal, and C36 (C35) terminal to body ground
    Check actuator operation: The right [left] rear door lock actuator and the fuel lid lock actuator should lock (or unlock).
    • Faulty right [left] rear door lock actuator
    • Faulty fuel lid lock actuator
    • An open in the wire
    C36
    YEL
    C35 *3
    PNK
    • Reconnect connector K to the under-dash fuse/relay box
    • Connect C35 terminal to body ground
    • Connect R13 terminal to body ground momentarily
    Check actuator operation: The fuel lid lock actuator should unlock.
    • Faulty fuel lid lock actuator
    • Faulty driver's door unlock relay
    • Poor ground (G501)
    • An open in the wire
    R13 *3
    BRN
    C47
    LT BLU
    Connect the battery positive terminal to C47 (C48) terminal, and C48 (C47) terminal to body ground
    Check actuator operation: The left [right] rear door lock actuator and the tailgate lock actuator should lock (or unlock).
    • Faulty left [right] rear door lock actuator
    • Faulty tailgate lock actuator
    • An open in the wire
    C48
    YEL
    A13 *1
    GRN
    Under all conditions
    Connect A13 terminal and B23 terminal with a jumper wire: The horn should sound
    • Faulty security horn
    • An open in the wire
    M23 *1
    GRN
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502, G503)
    • Faulty audio unit
    • An open in the wire
    B23
    WHT
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 3 (30 A *4 /20 A *5 ) fuse in the battery terminal fuse box
    • An open in the wire
    W1
    YEL
    Ignition switch ON (II)
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 1 (100 A) fuse in the battery terminal fuse box
    • Faulty ignition switch
    • An open in the wire
    Q3
    LT GRN
    Under all conditions
    Check for continuity between the Q3 terminal and the gauge control module No. 18 terminal: There should be continuity.
    An open in the wire
    Check for continuity to ground: There should be no continuity.
    A short to ground in the wire

    [ ]:
    LHD model

    *1:
    With security
    *2:
    Power door locks 1 motion
    *3:
    Power door locks 2 motion
    *4:
    With trailer lighting connector
    *5:
    Without trailer lighting connector

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    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
    C26
    PNK
    Right [Left] rear door open
    Check for continuity to ground: There should be continuity.
    • Faulty right [left] rear door switch
    • An open in the wire
    Right [Left] rear door closed
    Check for continuity to ground: There should be no continuity.
    • Faulty right [left] rear door switch
    • A short to ground in the wire
    C40
    GRN
    Left [Right] rear door open
    Check for continuity to ground: There should be continuity.
    • Faulty left [right] rear door switch
    • An open in the wire
    Left [Right] rear door closed
    Check for continuity to ground: There should be no continuity.
    • Faulty left [right] rear door switch
    • A short to ground in the wire
    C22
    ORN
    Tailgate open
    Check for continuity to ground: There should be continuity.
    • Faulty tailgate latch switch
    • Poor ground (G602) [G604]
    • 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
    C28 *2
    RED
    Tailgate unlocked
    Check for continuity to ground: There should be continuity.
    • Poor ground (G602)
    • Faulty tailgate lock knob switch
    • An open in the wire
    Tailgate locked
    Check for continuity to ground: There should be no continuity.
    • Faulty tailgate lock knob switch
    • A short to ground in the wire
    A29 *1
    PUR
    Hood open
    Check for continuity to ground: There should be continuity.
    • Faulty hood switch
    • Poor ground (G301)
    • An open in the wire
    Hood closed
    Check for continuity to ground: There should be no continuity.
    • Faulty hood switch
    • A short to ground in the wire

    *1:
    With security
    *2:
    With super locking

    [ ]:
    LHD model

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    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 UNLOCK
    Check for continuity to ground: There should be no continuity.
    • Faulty driver's door switch lock knob 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 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
    M24 *
    PUR
    Front passenger's door lock knob switch in UNLOCK
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • Faulty front passenger's door lock knob switch
    • An open in the wire
    Front passenger's door lock knob switch in LOCK
    Check for continuity to ground: There should be no continuity.
    • Faulty front passenger's door lock knob switch
    • A short to ground in the wire
    C45 *
    WHT
    Right rear door lock knob switch in UNLOCK
    Check for continuity to ground: There should be continuity.
    • Poor ground (G601)
    • Faulty right rear door lock knob switch
    • An open in the wire
    Right rear door lock knob switch in LOCK
    Check for continuity to ground: There should be no continuity.
    • Faulty right rear door lock knob switch
    • A short to ground in the wire
    C46 *
    GRN
    Left rear door lock knob switch in UNLOCK
    Check for continuity to ground: There should be continuity.
    • Poor ground (G603)
    • Faulty left rear door lock knob switch
    • An open in the wire
    Left rear door lock knob switch in LOCK
    Check for continuity to ground: There should be no continuity.
    • Faulty left rear door lock knob switch
    • A short to ground in the wire

    [ ]:
    LHD model

    *:
    With security or super locking

    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 LOCK (0), 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
    E3 *1
    PUR
    Driver's door key cylinder switch in LOCK
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • Faulty driver's door key cylinder switch
    • An open in the wire
    Driver's door key cylinder switch in neutral or UNLOCK
    Check for continuity to ground: There should be no continuity.
    • Faulty driver's door key cylinder switch
    • A short to ground in the wire
    E4 *1
    GRN
    Driver's door key cylinder switch in UNLOCK
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • Faulty driver's door key cylinder switch
    • An open in the wire
    Driver's door key cylinder switch in neutral or LOCK
    Check for continuity to ground: There should be no continuity.
    • Faulty driver's door key cylinder switch
    • A short to ground in the wire
    E8 *2
    LT BLU
    Driver's door lock switch in LOCK
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • Faulty door lock switch
    • An open in the wire
    Driver's door lock switch in neutral or UNLOCK
    Check for continuity to ground: There should be no continuity.
    • Faulty door lock switch
    • A short to ground in the wire
    E1 *2
    GRY
    Driver's door lock switch in UNLOCK
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • Faulty door lock switch
    • An open in the wire
    Driver's door lock switch in neutral or LOCK
    Check for continuity to ground: There should be no continuity.
    • Faulty door lock switch
    • A short to ground in the wire

    *1:
    With security or super locking
    *2:
    With driver's door lock switch

  1. Reconnect the connectors to the under-dash fuse/relay box, and make these input tests at the connectors.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    R7 *2
    GRY
    Connect R7 terminal to ground momentarily
    Check actuator operation: Driver's and front passenger's super locking actuators should lock.
    • Faulty driver's super locking actuator
    • Faulty passenger's super locking actuator
    • Faulty front supper locking relay
    • Poor ground (G501, G502)
    • An open in the wire
    R8 *2
    ORN
    Connect R8 terminal to ground momentarily
    Check actuator operation: Left rear and right rear super locking actuators should lock.
    • Faulty rear super locking relay
    • Faulty left rear super locking actuator
    • Faulty right rear super locking actuator
    • Poor ground (G601, G603)
    • An open in the wire

    *1:
    Power door locks 2 motion
    *2:
    With super locking