Fog Lights (Driver's and Passenger's MICU) Input Test
NOTE:
  • Before testing, make sure that there is no DTC and the B-CAN line is OK with the HDS.
  • Before testing, check the No. 26 (10 A) fuse in the driver's under-dash fuse/relay box and the No. 3 (10 A) and No. 17 (7.5 A) fuses in the passenger's under-dash fuse/relay box.
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 F, G, 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
    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
    F11 [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 passenger's under-dash fuse/relay box (RHD model)
    • An open in the wire
    F17 (LHD model)
    GRN
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 3-3 (AS LT MAIN) (50 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    F19
    BLK/RED
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 3-5 (DR LT MAIN) (40 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    R3
    BLK
    Under all conditions
    Check for continuity between the R3 terminal and the combination light switch 12P connector No. 12 (or No. 7) * terminal: There should be continuity.
    An open in the wire
    R6
    RED
    Combination light switch OFF
    Check for continuity between the R6 and R3 terminals:There should be continuity.
    An open in the wire
    R9
    ORN
    Rear fog light switch ON
    Check for continuity between R9 and R3 terminals: There should be continuity.
    An open in the wire
    Rear fog light switch OFF
    Check for continuity between R9 and R3 terminals: There should be no continuity.
    A short to ground in the wire
    R10
    PUR
    Front fog light switch ON
    Check for continuity between R10 and R3 terminals: There should be continuity.
    An open in the wire
    Front fog light switch OFF
    Check for continuity between R10 and R3 terminals: There should be no continuity.
    A short to ground in the wire
    G12
    BLU/YEL [LT BLU]
    Under all conditions
    Connect the F19 and G12 terminals with a jumper wire: The left [right] front fog light should come on.
    • Blown bulb
    • Poor ground (G302) [G201]
    • An open in the wire
    Q8
    GRN
    Under all conditions
    Check for continuity between the Q8 terminal and passenger's under-dash fuse/relay box connector A (38P) No. 17 terminal: There should be continuity.
    An open in the wire

    [ ]:
    RHD model

    *:
    KQ model