LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2015 >> Odyssey EX >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Keyless/Power Door Locks/Security System >> Control Unit Input Test >> Rear MICU
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Rear MICU

  1. 8. Turn the ignition switch to LOCK (0).
  2. 9. Remove the left rear side trim panel (see TRIM REMOVAL/INSTALLATION - REAR SIDE AREA ).
  3. 10. Disconnect rear fuse box connectors A and B.
    NOTE: All connector views are wire side of female terminals.
  4. 11. 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 12.
      Fig 1: Identifying Rear Fuse Box Connectors
      G06968691Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. 12. 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, go to step 13.
      NOTE: Before testing, make sure the No. E4 (10 A) and the No. E5 (7.5 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
    A9(1) PNK Power tailgate closer unit connector B (6P) disconnected Check for continuity between terminal A9 and power tailgate closer unit connector B (6P) terminal No. 5:
    There should be continuity.    		 An open or high resistance in the wire
    A9(1) PNK Connect terminal A25 to terminal B36 momentarily with a jumper wire. Check the actuator operation:
    The tailgate release actuator should work.
    • Faulty tailgate latch switch
    • Poor ground(G801)or an open in the ground wire
    • An open or high resistance in the wire
    B27 YEL Connect battery power to terminal B27 (or B28), and terminal B28 (or B27) to body ground with jumper wires Check actuator operation: The left sliding door lock actuator should UNLOCK (or LOCK).
    • Faulty left sliding door lock actuator
    • An open or high resistance in the wire
    B28 BLU
    (1) With power tailgate
  6. 13. 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, go to step 14.
      NOTE: Before testing, make sure the No. E4 (10 A) and the No. E5 (7.5 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
    B36 RED Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. A3-3(RR FB-1) (60 A) fuse in the main under-hood fuse/relay box
    • An open or high resistance in the wire
    B4 WHT Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. B16 (10 A) fuse the under-hood fuse/relay box
    • An open or high resistance in the wire
    B29 GRY Ignition switch ON (II) Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. C10(15 A) fuse the driver's under-dash fuse/relay box
    • An open or high resistance in the wire
    A1 BLK In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground (G801)
    • An open or high resistance in the ground wire
    A9(1) PNK Tailgate open Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty tailgate latch switch
    • Poor ground (G801) or an open in the ground wire
    • An open or high resistance in the wire
    Tailgate closed Measure the voltage to ground:
    There should be about 5 V.
    • Faulty tailgate latch switch
    • A short to ground in the wire
    B16 BLK In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground (G602)
    • An open or high resistance in the ground wire
    B26 BLK In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground (G602)
    • An open or high resistance in the ground wire
    A29 BLK In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground (G801)
    • An open or high resistance in the ground wire
    B12 ORN Left sliding door open Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty left sliding door switch
    • Faulty left sliding door switch ground
    • An open or high resistance in the wire
    Left sliding door closed Measure the voltage to ground:
    There should be about 5 V.
    • Faulty left sliding door switch
    • A short to ground in the wire
    B11 GRN Right sliding door open Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty right sliding door switch
    • Faulty right sliding door switch ground
    • An open or high resistance in the wire
    Right sliding door closed Measure the voltage to ground:
    There should be about 5 V.
    • Faulty right sliding door switch
    • A short to ground in the wire
    B21 LT GRN Right sliding door lock knob switch in UNLOCK Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty right sliding door lock knob switch
    • Poor ground (G652 and G671) or an open in the ground wire
    • An open or high resistance in the wire
    Right sliding door lock knob switch in LOCK Measure the voltage to ground:
    There should be about 5 V.
    • Faulty right sliding door lock knob switch
    • A short to ground in the wire
    B3 LT BLU Left sliding door lock knob switch in UNLOCK Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty left sliding door lock knob switch
    • Poor ground(G602) or an open in the ground wire
    • An open or high resistance in the wire
    Left sliding door lock knob switch in LOCK Measure the voltage to ground:
    There should be about 5 V.
    • Faulty left sliding door lock knob switch
    • A short to ground in the wire
    B15 RED Left sliding door lock knob switch in LOCK Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty left sliding door lock knob switch
    • Poor ground(G602)or an open in the ground wire
    • An open or high resistance in the wire
    Left sliding door lock knob switch in UNLOCK Measure the voltage to ground:
    There should be about 5 V.
    • Faulty left sliding door lock knob switch
    • A short to ground in the wire
    A16(1) ORN Tailgate outer handle switch pressed Measure the voltage to ground:
    There should be less than 0.2 V.
    • Faulty tailgate outer handle switch
    • Poor ground(G801) or an open in the ground wire
    • An open or high resistance in the wire
    Tailgate outer handle switch released Measure the voltage to ground:
    There should be about 5 V.
    • Faulty tailgate outer handle switch
    • A short to ground in the wire
    (1) Without power tailgate
scientia non olet · About LEMON Manuals