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. Remove the driver's dashboard undercover, then remove the dashboard lower cover.
  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