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Home >> Acura >> 2009 >> TSX Automatic >> 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: If you are troubleshooting multiple DTCs, be sure to follow the instructions in 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. Remove the driver's seat (see FRONT SEAT REMOVAL/INSTALLATION )
    NOTE: Be careful not to scratch the interior trim
  3. Disconnect the 40P connector (A) and 18P connector (B) from the power seat control unit (C)
    Fig 1: Identifying 40P And 18P Connectors
    G05995244Courtesy 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 these input tests at the following connectors
    • 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
    CONNECTOR WIRE REFERENCE CHART

    Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained
    A9 BLK/GRN Under all conditions Measure the voltage to ground
    There should be less than 0 5 V
    • Poor ground (G701)
    • An open in the wire
    B4 BLK/YEL Under all conditions Measure the voltage to ground
    There should be less than 0 5 V
    • Poor ground (G701)
    • An open in the wire
    B18 BLK Under all conditions Measure the voltage to ground
    There should be less than 0 5V
    • Poor ground (G701)
    • An open in the wire
    A34 BLK/YEL Ignition switch ON (II) Measure the voltage to ground
    There should be battery voltage
    • Blown No 2 (7 5 A) fuse in the driver's under-dash fuse/relay box
    • An open in the wire
    A36 BLU Under all conditions Measure the voltage to ground
    There should be battery voltage
    • Blown No 15 (10 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    B1 WHT Under all conditions Measure the voltage to ground
    There should be battery voltage
    • Blown No 3-4 (DR F/B) (60 A) fuse in the under-hood fuse/relay box
    • Blown No 21 (20 A) fuse in the driver's under-dash fuse/relay box
    • An open in the wire
    B8 PUR Under all conditions Measure the voltage to ground
    There should be battery voltage
    • Blown No 3-4 (DR F/B) (60 A) fuse in the under-hood fuse/relay box
    • Blown No 19 (20 A) fuse in the driver's under-dash fuse/relay box
    • An open in the wire
    A26 (M/T) BLK/BLU Parking brake lever pulled Measure the voltage to ground
    There should be less than 1 V
    • Faulty parking brake switch
    • An open in the wire
    Parking brake lever released Measure the voltage to ground
    There should be 5 V or more
    • Faulty parking brake switch
    • A short to ground in the wire
    A26 (A/T) BLK/BLU Shift lever in P position Measure the voltage to ground
    There should be less than 1 V
    • Poor ground (G101)
    • Faulty transmission range switch
    • An open in the wire
    Shift lever in any other position than P Measure the voltage to ground
    There should be 5 V or more
    • Faulty transmission range switch
    • A short to ground in the wire
    A15 WHT/BLK Under all conditions Measure the voltage to ground
    There should be about 5 V
    • Faulty position sensor
    • A short to ground in the wire
    A10
    A29    		 BLU/WHT
    GRN/BLK    		 Run the recline motor Measure the voltage between terminals A10 (+) and A29 (-)
    There should be about 2 5V average
    • Faulty position sensor
    • An open in the wire
    • A short to ground in the wire
    A31
    A29    		 YEL/BLK
    GRN/BLK    		 Run the slide motor Measure the voltage between terminals A31 (+) and A29 (-)
    There should be about 2 5V average
    • Faulty position sensor
    • An open in the wire
    • A short to ground in the wire
    A12
    A29    		 BLU/BLK
    GRN/BLK    		 Run the front up-down motor Measure the voltage between terminals A12 (+) and A29 (-)
    There should be about 2 5V average
    • Faulty position sensor
    • An open in the wire
    • A short to ground in the wire
    A13
    A29    		 GRN/WHT
    GRN/BLK    		 Run the rear up-down motor Measure the voltage between terminals A13 (+) and A29 (-)
    There should be about 2 5V average
    • Faulty position sensor
    • An open in the wire
    • A short to ground in the wire
  6. Turn the ignition switch to LOCK (0), then disconnect the connectors from the power seat control unit, and do these input tests at the following connectors
CONNECTOR WIRE REFERENCE CHART

Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained
A39 BLK/WHT Under all conditions (disconnect the door multiplex control unit 37P connector) Check for continuity between terminal A39 and door multiplex control unit 37P connector terminal No 33
There should be continuity		 An open in the wire
Under all conditions (disconnect the immobilizer-keyless control unit 7P connector) Check for continuity between terminal A39 and immobilizer-keyless control unit 7P connector terminal No 3
There should be continuity		 An open in the wire
A40 YEL Under all conditions (disconnect the door multiplex control unit 37P connector) Check for continuity between terminal A40 and door multiplex control unit 37P connector terminal No 35
There should be continuity		 An open in the wire
Under all conditions (disconnect the immobilizer-keyless control unit 7P connector) Check for continuity between terminal A40 and immobilizer-keyless control unit 7P connector terminal No 4
There should be continuity		 An open in the wire
A1
A7		 BLK/BRN
RED/WHT		 Slide switch in FORWARD position Check for continuity between the terminals
There should be continuity
  • Faulty driver's power seat adjustment switch
  • An open in the wire
A1
A24		 BLK/BRN
ORN		 Slide switch in BACKWARD position Check for continuity between the terminals
There should be continuity
  • Faulty driver's power seat adjustment switch
  • An open in the wire
A1
A6		 BLK/BRN
PNK		 Recline switch in FORWARD position Check for continuity between the terminals
There should be continuity
  • Faulty driver's power seat adjustment switch
  • An open in the wire
A1
A23		 BLK/BRN
PUR		 Recline switch in BACKWARD position Check for continuity between the terminals
There should be continuity
  • Faulty driver's power seat adjustment switch
  • An open in the wire
A1
A5		 BLK/BRN
LT GRN		 Front up-down switch in UP position Check for continuity between the terminals
There should be continuity
  • Faulty driver's power seat adjustment switch
  • An open in the wire
A1
A4		 BLK/BRN
RED/BLK		 Front up-down switch in DOWN position Check for continuity between the terminals
There should be continuity
  • Faulty driver's power seat adjustment switch
  • An open in the wire
A1
A22		 BLK/BRN
GRN/ORN		 Rear up-down switch in UP position Check for continuity between the terminals
There should be continuity
  • Faulty driver's power seat adjustment switch
  • An open in the wire
A1
A3		 BLK/BRN
GRY		 Rear up-down switch in DOWN position Check for continuity between the terminals
There should be continuity
  • Faulty driver's power seat adjustment switch
  • An open in the wire
B7
B17		 LT GRN
YEL		 Under all conditions Connect terminals B1 and B7, and terminals B17 and B4
The seat should slide backward
  • Faulty slide motor
  • An open in the wire
Connect terminals B1 and B17, and terminals B7 and B4
The seat should slide forward
B9
B11		 RED
GRY		 Under all conditions Connect terminals B1 and B9, and terminals B11 and B4
The seat should recline forward
  • Faulty recline motor
  • An open in the wire
Connect terminals B1 and B11, and terminals B9 and B4
The seat should recline backward
B6
B16		 BRN/WHT
ORN		 Under all conditions Connect terminals B1 and B6, and terminals B16 and B4
The front of seat should move down
  • Faulty front up-down motor
  • An open in the wire
Connect terminals B1 and B16, and terminals B6 and B4
The front of seat should move up
B2
B10		 GRN
BLU		 Under all conditions Connect terminals B1 and B2, and terminals B10 and B4
The rear of seat should move up
  • Faulty rear up-down motor
  • An open in the wire
Connect terminals B1 and B10, and terminals B2 and B4
The rear of seat should move down
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