MICS (Driver's MICU, Passenger's MICU, and Door Multiplex Control Unit) Input Test
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 N, P, 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 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    N12
    BRN [BLK]
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501) [G502]
    • 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
    Q16
    LT BLU
    Under all conditions
    Check for continuity between the Q16 terminal and the data link connector 16P connector No. 7 terminal: There should be continuity.
    An open in the wire
    P9
    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
    P20
    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-dash fuse/relay box
    • Faulty driver's under-dash fuse/relay box
    • An open in the wire
    P5
    BLU
    Immobilizer-keyless control unit 7P connector disconnected
    Check for continuity between the P5 terminal and the immobilizer-keyless control unit 7P connector No. 3 terminal: There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and the immobilizer-keyless control unit 7P connector No. 4 terminal: There should be continuity.
    An open in the wire
    P5
    BLU
    Gauge control module 32P connector disconnected
    Check for continuity between the P5 terminal and the gauge control module 32P connector No. 23 terminal: There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and the gauge control module 32P connector No. 24 terminal: There should be continuity.
    An open in the wire
    P5
    BLU
    Door multiplex control unit 37P connector disconnected
    Check for continuity between the P5 terminal and the door multiplex control unit 37P connector No. 33 terminal: There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and the door multiplex control unit 37P connector No. 35 terminal: There should be continuity.
    An open in the wire

    [ ]:
    RHD model

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    P5
    BLU
    Passenger's under-dash fuse/relay box connector A (38P) disconnected
    Check for continuity between the P5 terminal and passenger's under-dash fuse/relay box connector A (38P) No.29 terminal:There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and passenger's under-dash fuse/relay box connector A (38P) No.11 terminal:There should be continuity.
    An open in the wire
    P5
    BLU
    Heater control unit/climate control unit connector B (12P) disconnected
    Check for continuity between the P5 terminal and heater control unit/climate control unit connector B (12P) No.2 terminal:There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and heater control unit/climate control unit connector B (12P) No.1 terminal:There should be continuity.
    An open in the wire
    P5
    BLU
    Audio unit connector B (20P) disconnected
    Check for continuity between the P5 terminal and audio unit connector B (20P) No. 8 terminal:There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and audio unit connector B (20P) No. 18 terminal:There should be continuity.
    An open in the wire
    P5
    BLU
    Headlight leveling control unit *1 16P connector disconnected
    Check for continuity between the P5 terminal and the headlight leveling control unit 16P connector No. 15 terminal:There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P5 terminal and the headlight leveling control unit 16P connector No. 16 terminal:There should be continuity.
    An open in the wire
    P5
    BLU
    Automatic lighting/rain sensor *2 6P connector disconnected
    Check for continuity between the P5 terminal and the automatic lighting/rain sensor 6P connector No. 6 terminal:There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P5 terminal and the automatic lighting/rain sensor 6P connector No. 5 terminal:There should be continuity.
    An open in the wire

    *1:
    With headlight leveling system
    *2:
    With automatic wiper

    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    P5
    BLU
    Power seat control unit *3 connector A (40P) disconnected
    Check for continuity between the P5 terminal and power seat control unit connector A (40P) No. 39 terminal:There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and power seat control unit connector A (40P) No. 40 terminal:There should be continuity.
    An open in the wire
    P5
    BLU
    Hands Free Telephone control unit *4 28P connector disconnected
    Check for continuity between the P5 terminal and the Hands Free Telephone control unit 28P connector No.17 terminal:There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and the Hands Free Telephone control unit 28P connector No.18 terminal:There should be continuity.
    An open in the wire
    P5
    BLU
    Parking and back-up sensor control unit *5 16P connector disconnected
    Check for continuity between the P5 terminal and the parking and back-up sensor control unit 16P connector No. 6 terminal:There should be continuity.
    An open in the wire
    P6
    PNK
    Check for continuity between the P6 terminal and the parking and back-up sensor control unit 16P connector No. 7 terminal:There should be continuity.
    An open in the wire

    *3:
    With DPMS
    *4:
    With Hands Free Telephone system
    *5:
    With parking and back-up sensor system