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Home >> Honda >> 2014 >> Crosstour EX, 2.4L Eng >> Repair and Diagnosis >> Body & Frame >> Seats >> Driver Position Memory System (DPMS) (4-CYL) >> Power Seat Control Unit Input Test/Replacement
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Power Seat Control Unit Input Test/Replacement

NOTE:
  1. Turn the ignition switch to LOCK (0).
  2. Remove the driver's seat (see FRONT SEAT REMOVAL/INSTALLATION ).
    NOTE: Be careful not to scratch the interior trim.
  3. Disconnect the 18P connector (A) and 40P connector (B) from the power seat control unit (C).
    Fig 1: Identifying 18P, 40P Connector And Power Seat Control Unit
    G08086402Courtesy 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. 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 BLK/YEL Ignition switch ON (II) Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. B2 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • An open or high resistance in the wire
    B25 BLU Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. A15 (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. A3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box
    • Blown No. B21 (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. A3-4 (DR F/B STD) (60 A) fuse in the under-hood fuse/relay box
    • Blown No. B19 (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 (G801)
    • 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 (G801)
    • 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 (G801)
    • An open or high resistance in the ground wire
    B35 BLK/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 PUR Ignition switch ON (II) Measure the voltage to ground:
    There should be at least about 10 V.
    • Faulty position sensor
    • A short to ground in the wire
    B11
    .
    B32    		 GRN
    .
    WHT    		 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    		 BRN
    .
    WHT    		 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    		 PNK
    .
    WHT    		 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
    .
    WHT    		 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    		 LT BLU
    .
    BLU    		 Slide switch in FORWARD position Measure the voltage between the terminals:
    There should be less then 0.2 V.
    • Faulty driver's power seat adjustment switch
    • An open or high resistance in the wire
    B20
    .
    B37    		 LT BLU
    .
    BRN    		 Slide switch in BACKWARD position Measure the voltage between the terminals:
    There should be less then 0.2 V.
    • Faulty driver's power seat adjustment switch
    • An open or high resistance in the wire
    B20
    .
    B15    		 LT BLU
    .
    GRY    		 Recline switch in FORWARD position Measure the voltage between the terminals:
    There should be less then 0.2 V.
    • Faulty driver's power seat adjustment switch
    • An open or high resistance in the wire
    B20
    .
    B38    		 LT BLU
    .
    RED    		 Recline switch in BACKWARD position Measure the voltage between the terminals:
    There should be less then 0.2 V.
    • Faulty driver's power seat adjustment switch
    • An open or high resistance in the wire
    B20
    .
    B16    		 LT BLU
    .
    LT GRN    		 Front up-down switch in UP position Measure the voltage between the terminals:
    There should be less then 0.2 V.
    • Faulty driver's power seat adjustment switch
    • An open or high resistance in the wire
    B20
    .
    B17    		 LT BLU
    .
    WHT    		 Front up-down switch in DOWN position Measure the voltage between the terminals:
    There should be less then 0.2 V.
    • Faulty driver's power seat adjustment switch
    • An open or high resistance in the wire
    B20
    .
    B39    		 LT BLU
    .
    BLU    		 Rear up-down switch in UP position Measure the voltage between the terminals:
    There should be less then 0.2 V.
    • Faulty driver's power seat adjustment switch
    • An open or high resistance in the wire
    B20
    .
    B18    		 LT BLU
    .
    ORN    		 Rear up-down switch in DOWN position Measure the voltage between the terminals:
    There should be less then 0.2 V.
    • Faulty driver's power seat adjustment switch
    • An open or high resistance in the wire
  6. Turn the ignition switch to LOCK (0), then 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 control unit must be faulty; replace it.
    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    B23 BLK 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    		 WHT
    .
    YEL    		 Under all conditions Connect terminals A8 and A2, and terminals A10 and A5:
    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 A5:
    The seat should slide forward.
    A18
    .
    A16    		 GRY
    .
    RED    		 Under all conditions Connect terminals A8 and A18, and terminals A16 and A5:
    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 A5:
    The seat should recline backward.
    A3
    .
    A11    		 YEL
    .
    ORN    		 Under all conditions Connect terminals A8 and A3, and terminals A11 and A5:
    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 A5:
    The front of seat should move up.
    A7
    .
    A17    		 GRN
    .
    WHT    		 Under all conditions Connect terminals A8 and A7, and terminals A17 and A5:
    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 A5:
    The rear of seat should move down.
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