MICU Input Test
  1. Turn the ignition switch OFF.
  1. Disconnect the under-dash fuse/relay box connectors E, F, K, and T.
    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.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    E6
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G602) [G652]
    • An open in the wire
    E33
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G651)
    • An open in the wire
    F20
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G401)
    • An open in the wire
    T34
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G503)
    • An open in the wire
    K4
    LT GRN
    Under all conditions (With sunshade: map light switch in DOOR position)
    Attach to ground: The ceiling light and map lights (with sunshade) should come on.
    • Blown No. 17 (7.5 A) fuse in the under-hood fuse/relay box
    • Blown bulb(s)
    • Faulty ceiling light
    • Faulty map light (with sunshade)
    • An open in the wire

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    RHD