2012 Honda Odyssey EXFACTORY OEM SERVICE PROCEDURE

Door Multiplex Control Unit Input Test

NOTE: Before testing, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Turn the ignition switch to LOCK (0).
  2. Open and close the driver's door, then remove the power window master switch panel (see REAR POWER WINDOW MOTOR REPLACEMENT ).
  3. Disconnect the 37P connector (A) from the power window master switch (B).
    Fig 1: Identifying 37P Connector And Power Window Master Switch
    G06970199Courtesy 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 connector 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 6.
      TEST CONDITION CHART

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      12 BLU Under all conditions Connect terminals No. 26 and No. 12 with jumper wires: The driving position memory switch indicator 2 should come on.
      • Faulty LED
      • Faulty driving position memory switch
      • Poor ground (G401) or an open in the ground wire
      • An open or high resistance in the wire
      10 YEL Under all conditions Connect terminals No. 26 and No. 10 with jumper wires: The driving position memory switch indicator 1 should come on.
      • Faulty LED
      • Faulty driving position memory switch
      • Poor ground (G401) or an open in the ground wire
      • An open or high resistance in the wire
      37 BRN Under all conditions Connect terminals No. 26 and No. 37 with jumper wires: The driving position memory switch lights should come on.
      • Faulty LED
      • Faulty driving position memory switch
      • Poor ground (G401) or an open in the ground wire
      • An open or high resistance in the wire
      36 GRY Disconnect the front passenger's power window switch 37P connector and the moonroof control unit/motor 14P connector Check for continuity between terminal No. 36 and front passenger's power window switch 37P connector terminal No. 34:
      There should be continuity.      		 An open in the UART wire
      Check for continuity between terminal No. 36 and moonroof control unit/motor 14P connector terminal No. 12:
      There should be continuity.      		 An open in the UART wire
      Check for continuity to ground:
      There should be no continuity.      		 A short to ground in the UART wire
  6. Reconnect the connector to the power window master switch, and do the following input tests:
    TEST CONDITION CHART

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    26 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
    25 LT GRN Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage.
    • Blown No. C26 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • An open or high resistance in the wire
    4 WHT Under all conditions Measure the voltage to ground: There should be battery voltage.
    • Blown No. C19 (20 A) fuse in the driver's under-dash fuse/relay box
    • An open or high resistance in the wire
    31 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
    3 BLK In all ignition switch positions 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
    23 RED Under all conditions, position 2 switch pressed Measure the voltage to ground: There should be less than 0.2 V.
    • Faulty driving position memory switch
    • Poor ground (G401) or an open in the ground wire
    • An open or high resistance in the wire
    Under all conditions, position 2 switch released Measure the voltage to ground: There should be about 5 V.
    • Faulty driving position memory switch
    • A short to ground in the wire
    22 GRN Under all conditions, position 1 switch pressed Measure the voltage to ground: There should be less than 0.2 V.
    • Faulty driving position memory switch
    • Poor ground (G401) or an open in the ground wire
    • An open or high resistance in the wire
    Under all conditions, position 1 switch released Measure the voltage to ground: There should be about 5 V.
    • Faulty driving position memory switch
    • A short to ground in the wire
    20 ORN Under all conditions, SET switch pressed Measure the voltage to ground: There should be less than 0.2 V.
    • Faulty driving position memory switch
    • Poor ground (G401) or an open in the ground wire
    • An open or high resistance in the wire
    Under all conditions, SET switch released Measure the voltage to ground: There should be about 5 V.
    • Faulty driving position memory switch
    • A short to ground in the wire
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.