Honda Odyssey Service Manual: Seat Heater Control Unit Input Test/Replacement

Honda Odyssey Service Manual / Body / Seating / Heated Cooled System / Seat Heater Control Unit Input Test/Replacement

NOTE:

  • SRS components are located in this area. Review the SRS component locations, and precautions and procedures   before doing repairs or servicing.

  • Before testing, make sure the No. A3-4 (AS FB-1) (50 A) fuse in the main under-hood fuse box, and the No. C22 (15 A) fuse in the driver's under-dash fuse/relay box are OK.

  1. Press the engine start/stop button to select the OFF mode.

  1. Remove the Passenger's seat.

    NOTE: Be careful not to scratch the interior trim.

  1. Disconnect the 14P connector (A) from the seat heater control unit (B).

  2. 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 Wire side offemale terminalsBALT BLULT GRNPURBRNWHTREDPNKBLKGRN
  3. 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.


  4. With the 14P connector still disconnected, and 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.

    Cavity

    Wire

    Test condition

    Test: Desired result

    Possible cause if desired result is
    not obtained

    13
    ?
    7

    WHT
    ?
    PUR

    Under all conditions

    Check for continuity between terminals:
    There should be continuity.

    • Faulty driver's seat cushion heater

    • An open or high resistance in the ground wire

    12
    ?
    6

    BRN
    ?
    GRN

    Under all conditions

    Check for continuity between terminals:
    There should be continuity.

    • Faulty front passenger's seat cushion heater

    • An open or high resistance in the ground wire

  5. Reconnect the 14P connector to the seat heater control unit, and 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, replace the seat heater control unit.

    Cavity

    Wire

    Test condition

    Test: Desired result

    Possible cause if desired result is
    not obtained

    4

    BLK

    All power modes

    Check for continuity to ground:
    There should be continuity.

    • Poor ground (G651)

    • An open or high resistance in the ground wire

    9

    LT GRN

    Power mode ON

    Measure the voltage to ground:
    There should be battery voltage.

    • Blown No. D20 (7.5 A) fuse in the passenger's under-dash fuse/relay box

    • An open or high resistance in the wire

    2

    PNK

    Power mode ON

    Measure the voltage to ground:
    There should be battery voltage.

    • Blown No. D5 (15 A) fuse in the passenger's under-dash fuse/relay box

    • Faulty seat heater relay

    • An open or high resistance in the wire

    3

    LT BLU

    Power mode ON

    Measure the voltage to ground:
    There should be battery voltage.

    • Faulty front passenger's seat cushion heater

    • An open or high resistance in the wire

    1

    RED

    Power mode ON

    Measure the voltage to ground:
    There should be battery voltage.

    • Faulty driver's seat cushion heater

    • Faulty driver's seat-back heater

    • An open or high resistance in the wire

Seat Heater Replacement

Removal

NOTE: SRS components are located in this area. Review the SRS component locations, and precautions and procedures   before doing repairs or servicing.

    Heated Cooled System

    Seat Cushion Heater

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