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Control Unit Input Test: MICU

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn the ignition switch to LOCK (0).
  2. Remove the driver's kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
  3. Disconnect driver's under-dash fuse/relay box connectors E, F, G, H, M, P, and Q.
    NOTE: All connector views are wire side of female terminals.
    Fig 1: Identifying Driver's Under-Dash Fuse/Relay Box Connectors
    G06968690Courtesy 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 the following input tests:
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, reconnect the connectors to driver's under-dash fuse/relay box, then go to step 6.
      NOTE: Before testing, make sure the No. C6 (7.5 A) and the No. C7 (20 A) fuses in the driver's under-dash fuse/relay box is OK.
    CONTROL UNIT INPUT TEST RESULT

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    M4 ORN Connect battery power to terminal M4 (or M6), and terminal M6 (or M4) to body ground with jumper wires. Check actuator operation: The front passenger's door lock actuator should UNLOCK (or LOCK).
    • Faulty front passenger's door lock actuator
    • An open or high resistance in the wire
    M6 LT GRN
    M3 ORN Connect battery power to terminal M3 (or M7), and terminal M7 (or M3) to body ground with jumper wires. Check actuator operation: The driver's door lock actuator should UNLOCK (or LOCK).
    • Faulty driver's door lock actuator
    • An open or high resistance in the wire
    M7 RED
    H13 BRN Connect battery power to terminal H13 (or H12), and terminal H12(or H13) to body ground with jumper wires. Check actuator operation: The right sliding door lock actuator should UNLOCK (or LOCK).
    • Faulty right sliding door lock actuator
    • An open or high resistance in the wire
    H12 YEL
  6. Reconnect the connectors to the driver's under-dash fuse/relay box.
  7. Turn the ignition switch to ON (II).
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, reconnect the connectors to driver's under-dash fuse/relay box, then go to step 8.
    CONTROL UNIT INPUT TEST RESULT

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    F2 BLU Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. A3-1 (DR FB-2) (50 A) fuse in the main under-hood fuse box
    • An open or high resistance in the wire
    F24 WHT Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. B16 (10 A) fuse in the under-hood fuse/relay box
    • An open or high resistance in the wire
    H1 BRN Under all conditions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground(G402)
    • An open or high resistance in the ground wire
    G5 BLK In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground(G401)
    • An open or high resistance in the ground wire
    P2 BLK In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground (G401)
    • An open or high resistance in the ground wire
    G3 LT GRN Front passenger's door open Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty front passenger's door switch
    • Faulty front passenger's door switch ground
    • An open or high resistance in the wire
    Front passenger's door closed Measure the voltage to ground:
    There should be about 5 V.
    • Faulty front passenger's door switch
    • A short to ground in the wire
    E22 LT BLU Driver's door open Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty driver's door switch
    • Faulty driver's door switch ground
    • An open or high resistance in the wire
    Driver's door closed Measure the voltage to ground:
    There should be about 5 V.
    • Faulty driver's door switch
    • A short to ground in the wire
    Q4 PNK Ignition key inserted into the ignition switch Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty ignition key switch
    • Poor ground(G402) or an open in the ground wire
    • An open or high resistance in the wire
    Ignition switch LOCK (0), and the ignition key removed from the ignition switch Measure the voltage to ground:
    There should be about 5 V.
    • Faulty ignition key switch
    • A short to ground in the wire
    Q7 WHT In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V(4).
    • Faulty audio unit(2), audio-navigation unit(1), or rear controller and screen(3)
    • An open or high resistance in the wire
    (1) With navigation
    (2) Without navigation
    (3) With rear entertainment
    (4) If the factory-installed audio unit, audio-navigation unit, or rear controller and screen is removed from the vehicle, this voltage will be between 10-12 V.
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