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
NOTE: Before testing, make sure the turn signal/hazard warning lights work properly.
Driver's MICU
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect driver's under-dash fuse/relay box connectors D, E, F, G, N, Q, and R.
    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 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 .
    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
    D8
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G601)
    • An open in the wire
    Q1
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    Q2
    BRN
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    R2
    BRN
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    R5
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    D2
    YEL
    Connect N9 and D2 (or D9) terminals, and D9 (or D2) terminal to ground.
    Check actuator operation: The left [right] rear door lock actuator should unlock (or lock).
    • Faulty left [right] rear door lock actuator
    • An open in the wire
    D9
    ORN [BLU]
    D16
    ORN
    Connect N9 and D16 terminals momentarily
    Check actuator operation: The trunk lid release actuator should work.
    • Poor ground (G901)
    • Faulty trunk lid release actuator
    • An open in the wire
    F23
    GRY
    Under all conditions
    Attach to ground: The horns should sound.
    • Blown No. 10 (10 A) fuse in the under-hood fuse/relay box
    • Faulty horn relay
    • Faulty horn
    • An open in the wire
    N1
    YEL [PNK]
    Connect N9 and N1 (or N2) terminals, and N2 (or N1) terminal to 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
    N2
    ORN [RED]

    [ ]:
    RHD model

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    N1(LHD model)
    YEL
    Connect N9 and N1 (or D9) terminals, and D9 (or N1) terminal to body ground.
    Check actuator operation: The fuel fill door lock actuator should unlock (or lock).
    • Faulty fuel fill door lock actuator
    • An open in the wire
    D9(LHD model)
    ORN
    N1(RHD model)
    PNK
    Connect N9 and N1 (or N2) terminals, and N2 (or N1) terminal to body ground.
    Check actuator operation: The fuel fill door lock actuator should unlock (or lock).
    • Faulty fuel fill door lock actuator
    • An open in the wire
    N2(RHD model)
    RED
    [E14]
    WHT
    Under all conditions
    Measure the voltage to ground: The should be battery voltage.
    • Blown No. 15 (10 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    [Q9]
    ORN
    Under all conditions
    Check for continuity between the Q9 terminal and No. 3 terminal of the alarm control siren: The should be continuity.
    An open in the wire

    [ ]:
    KE, KN model

  1. Reconnect the connectors to the driver'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 7 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    E3
    PNK
    Trunk lid outer handle press
    Measure the voltage to ground: There should be less than 1 V.
    • Faulty trunk lid outer handle switch
    • An open in the wire
    • Poor ground (G901)
    Trunk lid outer handle release
    Measure the voltage to ground: There should be more than 5 V.
    • Faulty trunk lid outer handle switch
    • A short to ground in the wire

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
D4
LT GRN
Left [right] rear door open
Measure the voltage to ground: There should be less than 1 V.
  • Faulty left [right] rear door switch
  • An open in the wire
Left [right] rear door closed
Measure the voltage to ground: There should be more than 5 V.
  • Faulty left [right] rear door switch
  • A short to ground in the wire
D5
WHT
Trunk lid open, remove the trunk light bulb
Measure the voltage to ground: There should be less than 1 V.
  • Faulty trunk lid latch switch
  • An open in the wire
Trunk lid closed, remove the trunk light bulb
Measure the voltage to ground: There should be more than 5 V.
  • Faulty trunk lid latch switch
  • A short to ground in the wire
D12
BRN [GRN]
Driver's door open
Measure the voltage to ground: There should be less than 1 V.
  • Faulty driver's door switch
  • An open in the wire
Driver's door closed
Measure the voltage to ground: There should be more than 5 V.
  • Faulty driver's door switch
  • A short to ground in the wire
D15 *1
GRY [GRN]
Left [right] rear door lock knob switch in UNLOCK
Measure the voltage to ground: There should be less than 1 V.
  • Poor ground (G601)
  • Faulty left [right] rear door lock knob switch
  • An open in the wire
Left [right] rear door lock knob switch in LOCK
Measure the voltage to ground: There should be battery voltage.
  • Faulty left [right] rear door lock knob switch
  • A short to ground in the wire
G3 *1
GRN/BLK
Hood open
Measure the voltage to ground: There should be less than 1 V.
  • Poor ground (G302)
  • Faulty hood switch
  • An open in the wire
Hood closed
Measure the voltage to ground: There should be more than 5 V.
  • Faulty hood switch
  • A short to ground in the wire
Q18
WHT
Ignition key inserted into the ignition switch
Measure the voltage to ground: There should be less than 1 V.
  • Faulty ignition key switch
  • An open in the wire
  • Poor ground (G503)
Ignition switch LOCK (0), and the ignition key removed from the ignition switch
Measure the voltage to ground: There should be more than 5 V.
  • Faulty ignition key switch
  • A short to ground in the wire

[ ]:
RHD model
*1:
With security

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

Door Multiplex Control Unit
  1. Turn the ignition switch to LOCK (0), and remove the power window master switch.
  1. Disconnect the 37P connector from the door multiplex control unit.
  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 15 .
  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 the input test proves OK, go to Step 16 .
    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
    • An open in the wire
    14
    LT GRN
    Under all conditions
    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
    27
    BLU [BLK]
    Under all conditions (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

    [ ]:
    RHD model

  1. Reconnect the 37P connector to the door multiplex control unit, 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, go to Step 17 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    28
    ORN
    Driver's door key cylinder switch in LOCK
    Measure the voltage to ground: There should be less than 1 V.
    • 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
    Measure the voltage to ground: There should be 5 V or more.
    • Faulty driver's key cylinder switch
    • A short to ground in the wire
    29
    BRN
    Driver's door key cylinder switch in UNLOCK
    Measure the voltage to ground: There should be less than 1 V.
    • 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
    Measure the voltage to ground: There should be 5 V or more.
    • Faulty driver's door key cylinder switch
    • A short to ground in the wire
    30
    YEL [GRN]
    Driver's door lock knob switch in LOCK
    Measure the 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 in UNLOCK
    Measure the voltage to ground: There should be 5 V or more.
    • Faulty driver's door lock knob switch
    • A short to ground in the wire
    31
    WHT
    Driver's door lock knob switch in UNLOCK
    Measure the 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 in LOCK
    Measure the voltage to ground: There should be 5 V or more.
    • Faulty driver's door lock knob switch
    • A short to ground in the wire

    [ ]:
    RHD model

Front Passenger's Power Window Switch
  1. Turn the ignition switch to LOCK (0), and remove the front passenger's power window switch.
  1. Disconnect the 37P connector from the front passenger's power window switch.
  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 20 .
  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 the input test proves OK, go to Step 21 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    37
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G505)
    • An open in the wire
    25
    GRN [BLK]
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 13 (20 A) fuse in the passenger's under-dash fuse/relay box
    • An open in the wire

    [ ]:
    RHD model

  1. Reconnect the 37P connector to the front passenger's power window switch, 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, go to Step 22 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    34
    WHT
    Front passenger's door lock knob switch in UNLOCK
    Measure the voltage to ground: There should be less than 1 V.
    • Poor ground (G505)
    • Faulty front passenger's door lock knob switch
    • An open in the wire
    Front passenger's door lock knob switch in LOCK
    Measure the voltage to ground: There should be 5 V or more.
    • Faulty front passenger's door lock knob switch
    • A short to ground in the wire

  1. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the driver's MICU). If input failures are related to a particular control unit, replace the control unit.