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Control Unit Input Test: MICU

  1. Turn the ignition switch to LOCK (0).
  2. Remove the left kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
  3. Disconnect the driver's under-dash fuse/relay box connectors.
    NOTE: All connector views are wire side of female terminals.
    Fig 1: Identifying Driver's Under-Dash Fuse/Relay Box Connectors
    G06162851Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. 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.
  5. With the connectors still disconnected, do 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.
    WIRE TEST CONDITION REFERENCE TABLE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    P8 PNK Under all conditions Attach to ground: The driver's and front passenger's footwell lights should come on.
    • Blown No. 6 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty footwell light
    • An open in the wire
    H14 ORN Under all conditions Attach to ground: The ignition key light should come on.
    • Blown No. 7 (10 A) fuse in the driver's under-dash fuse/relay box
    • Faulty ignition key light
    • An open in the wire
    W4 PNK Interior lights switch in DOOR position Attach to ground: The individual map lights should come on.
    • Blown No. 6 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty map light
    • Faulty roof console
    • An open in the wire
  6. Reconnect the connectors to the driver's under-dash fuse/relay box, and do these input tests at the connectors.
    WIRE TEST CONDITION REFERENCE TABLE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    P1 BRN Under all conditions Measure the voltage to ground:
    There should be less than 0.1 V.
    • Poor ground (G502)
    • An open in the wire
    E9 BLK Under all conditions Measure the voltage to ground:
    There should be less than 0.1 V.
    • Poor ground (G601)
    • An open in the wire
    H9 BLK
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