Headlight Washer Control Unit Input Test
  1. Remove the driver's dashboard lower cover.
  1. Disconnect the 6P connector (A) from the headlight washer control unit (B).
  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 4 .
  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 all the input tests prove OK, replace the headlight washer control unit.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    4
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G401)
    • An open in the wire
    2
    WHT
    Under all conditions
    Check for voltage to ground: There should be battery voltage.
    • Blown No. 31 (30 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    5
    YEL
    Under all conditions
    • Check for continuity between the No. 5 terminal and the No. 17 terminal of the under-dash fuse/relay box connector S (20P): There should be continuity.
    • Check for continuity between the No. 5 terminal and the No. 1 terminal of the windshield wiper/washer switch 8P connector: There should be continuity.
    • Faulty MICU
    • Faulty windshield washer switch
    • An open in the wire
    6
    GRN
    Headlight switch ON
    Check for voltage to ground: There should be battery voltage.
    • Blown No. 16 * fuse in the under-dash fuse/relay box
    • Faulty MICU
    • Faulty combination light switch
    • An open in the wire
    1
    BLU
    Connect No. 1 and No. 2 terminals with a jumper wire.
    Check motor operation:
    The headlight washer motor should run.
    • Faulty headlight washer motor
    • An open in the wire
    • Poor ground (G401)

    *
    (15 A):
    With HID
    (10 A):
    Without HID