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

Honda Odyssey Service Manual / Body / Seating / Seat Controls / Power Seat Controls / Power Seat 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.

  • If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

  1. Turn the ignition switch to LOCK (0).

  1. Remove the driver's seat.

    NOTE: Be careful not to scratch the interior trim.

  1. Disconnect the 18P connector (A) and 40P connector (B) from the power seat control unit (C).

  2. 1 2 3 4 5 6 7 8 9 10 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 2 3 4 5 6 7 8 9 10 21 22 23 24 25 26 27 28 29 30 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 4 0 CONNECTOR BCONNECTOR AWire side offemale terminalsWire side offemale terminalsBABLUWHTREDORNGRYLT BLUBLKGRNWHTREDYELBLUPNKGRNLT GRNBLUORNGRNWHTGRYYELPNKLT GRNPURBLUBLKPNKGRNBLKBRNGRYLT BLUC
  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. Reconnect the connectors to the power seat 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, go to step 6.

    Cavity

    Wire

    Test condition

    Test: Desired result

    Possible cause if desired result is
    not obtained

    B27

    GRN

    Ignition switch ON (II)

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

    • Blown No. C11 (7.5 A) fuse in the driver's under-dash fuse/relay box

    • An open or high resistance in the wire

    B25

    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

    A8

    PNK

    Under all conditions

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

    • Blown No. C32 (20 A) fuse in the driver's under-dash fuse/relay box

    • An open or high resistance in the wire

    A1

    LT BLU

    Under all conditions

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

    • Blown No. C15 (20 A) fuse in the driver's under-dash fuse/relay box

    • An open or high resistance in the wire

    B12

    BLK

    In all ignition switch positions

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Poor ground (G601)

    • An open or high resistance in the ground wire

    A5

    BLK

    In all ignition switch positions

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Poor ground (G601)

    • An open or high resistance in the ground wire

    A9

    BLK

    In all ignition switch positions

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Poor ground (G601)

    • An open or high resistance in the ground wire

    B35

    BLU

    Shift lever in P position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty transmission range switch

    • Poor ground (G101) or an open in the ground wire

    • An open or high resistance in the wire

    Shift lever in any other position than P

    Measure the voltage to ground:
    There should be about 5 V.

    • Faulty transmission range switch

    • A short to ground in the wire

    B6

    BLU

    Run the power seat motors

    Measure the voltage to ground:
    There should be at least about 10 V.

    • Faulty position sensor

    • Faulty power seat control unit

    • A short to ground in the wire

    B11
    ·
    B32

    GRN
    ·
    ORN

    Run the recline motor

    Measure the voltage between terminals B11 (+) and B32 (-):
    There should be about 2.5 V   average.

    • Faulty position sensor

    • An open or high resistance in the wire

    • A short to ground in the wire

    B10
    ·
    B32

    WHT
    ·
    ORN

    Run the slide motor

    Measure the voltage between terminals B10 (+) and B32 (-):
    There should be about 2.5 V   average.

    • Faulty position sensor

    • An open or high resistance in the wire

    • A short to ground in the wire

    B9
    ·
    B32

    RED
    ·
    ORN

    Run the front up-down motor

    Measure the voltage between terminals B9 (+) and B32 (-):
    There should be about 2.5 V   average.

    • Faulty position sensor

    • An open or high resistance in the wire

    • A short to ground in the wire

    B8
    ·
    B32

    YEL
    ·
    ORN

    Run the rear up-down motor

    Measure the voltage between terminals B8 (+) and B32 (-):
    There should be about 2.5 V   average.

    • Faulty position sensor

    • An open or high resistance in the wire

    • A short to ground in the wire

    B20
    ·
    B14

    BLU
    ·
    GRY

    Slide switch in FORWARD position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty driver's power seat adjustment switch

    • An open or high resistance in the wire

    B20
    ·
    B37

    BLU
    ·
    LT GRN

    Slide switch in BACKWARD position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty driver's power seat adjustment switch

    • An open or high resistance in the wire

    B20
    ·
    B15

    BLU
    ·
    LT BLU

    Recline switch in FORWARD position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty driver's power seat adjustment switch

    • An open or high resistance in the wire

    B20
    ·
    B38

    BLU
    ·
    GRN

    Recline switch in BACKWARD position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty driver's power seat adjustment switch

    • An open or high resistance in the wire

    B20
    ·
    B16

    BLU
    ·
    ORN

    Front up-down switch in UP position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty driver's power seat adjustment switch

    • An open or high resistance in the wire

    B20
    ·
    B17

    BLU
    ·
    RED

    Front up-down switch in DOWN position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty driver's power seat adjustment switch

    • An open or high resistance in the wire

    B20
    ·
    B39

    BLU
    ·
    PNK

    Rear up-down switch in UP position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty driver's power seat adjustment switch

    • An open or high resistance in the wire

    B20
    ·
    B18

    BLU
    ·
    WHT

    Rear up-down switch in DOWN position

    Measure the voltage to ground:
    There should be less than 0.2 V.

    • Faulty driver's power seat adjustment switch

    • An open or high resistance in the wire


  5. Turn the ignition switch to LOCK (0).

  6. Disconnect the connectors from the power seat 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, the power seat control unit must be faulty; replace it.

    Cavity

    Wire

    Test condition

    Test: Desired result

    Possible cause if desired result is
    not obtained

    B23

    GRY

    Disconnect the power mirror control unit 24P connector

    Check for continuity between terminal B23 and power mirror control unit 24P connector terminal No. 24:
    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

    A2
    ·
    A10

    GRY
    ·
    BLU

    Under all conditions

    Connect terminals A8 and A2, and terminals A10 and A9 with jumper wires:
    The seat should slide backward.

    • Faulty slide motor

    • An open or high resistance in the wire

    Connect terminals A8 and A10, and terminals A2 and A9 with jumper wires:
    The seat should slide forward.

    A18
    ·
    A16

    YEL
    ·
    LT GRN

    Under all conditions

    Connect terminals A8 and A18, and terminals A16 and A9 with jumper wires:
    The seat should recline forward.

    • Faulty recline motor

    • An open or high resistance in the wire

    Connect terminals A8 and A16, and terminals A18 and A9 with jumper wires:
    The seat should recline backward.

    A3
    ·
    A11

    BRN
    ·
    PUR

    Under all conditions

    Connect terminals A8 and A3, and terminals A11 and A9 with jumper wires:
    The front of seat should move down.

    • Faulty front up-down motor

    • An open or high resistance in the wire

    Connect terminals A8 and A11, and terminals A3 and A9 with jumper wires:
    The front of seat should move up.

    A7
    ·
    A17

    GRN
    ·
    PNK

    Under all conditions

    Connect terminals A8 and A7, and terminals A17 and A9 with jumper wires:
    The rear of seat should move up.

    • Faulty rear up-down motor

    • An open or high resistance in the wire

    Connect terminals A8 and A17, and terminals A7 and A9 with jumper wires:
    The rear of seat should move down.

    Power Lumbar Support Switch Test/Replacement

    Heated Cooled System

    See More:

    Honda Odyssey Owners Manual > Maintenance Under the Hood: Oil Check
    We recommend that you check the engine oil level every time you refuel. Park the vehicle on level ground. Wait approximately three minutes after turning the engine off before you check the oil. 1. Remove the dipstick (orange loop). 2. Wipe the dipstick with a clean cloth or paper towel. 3. Insert th ...

    Honda Odyssey Owners Manual

    Honda Odyssey Service Manual

    © 2018-2020 Copyright www.hodyssey.net
    0.0184