Fog Lights (Driver's and Passenger's MICU) Input Test
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, B, E, and F.
    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 9
  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 10 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    A36
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G505)
    • An open in the wire
    A37
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G505)
    • An open in the wire
    E15
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G201) [G302]
    • An open in the wire
    E16
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G201) [G302]
    • An open in the wire
    A8 [F1]
    WHT [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
    • Faulty driver's under-dash fuse/relay box (LHD model)
    • An open in the wire
    B1
    GRN
    Under all conditions
    Measure the voltage to ground: There should be battery voltage.
    • Blown No. 2-2 (AS F/B OP) (40 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    A17
    GRN
    Under all conditions
    Check for continuity between the A17 terminal and driver's under-dash fuse/relay box connector Q (20P) No. 8 terminal: There should be continuity.
    An open in the wire
    A23
    WHT
    Under all conditions
    Connect the B1 and A23 terminals with a jumper wire: The rear fog light should come on.
    • Blown bulb
    • Poor ground (G901)
    • An open in the wire
    E13
    LT BLU [BLU/YEL]
    Under all conditions
    Connect the A8 [F1] and E13 terminals with a jumper wire: The right [left] front fog light should come on.
    • Blown bulb
    • Poor ground (G201) [G302]
    • An open in the wire

    [ ]:
    RHD model

  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.