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Diagnostic Test

  1. CHECK FOR RELATED DIAGNOSTIC TROUBLE CODES 
    1. Turn the ignition on.
    2. With the scan tool, record and erase Memory Seat Module-Driver (MSMD) DTCs.

      Does the scan tool display any seat position sensor DTCs?

      Yes 

      No 

      • Go To  2
  2. CHECK IF THE DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, record and erase Memory Seat Module-Driver (MSMD) DTCs.
    3. Cycle the ignition switch from off to on.
    4. Move the Seat Switch in the horizontal position three times.
    5. With the scan tool, read MSMD DTCs.

      Does the scan tool display this DTC as active?

      Yes 

      • Go To  3

      No 

      • The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the Driver Horizontal Seat Adjuster Motor harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage between ground the (G401) Driver Seat Horizontal Position Sense circuit.

      Is the voltage above 11.0 volts?

      Yes 

      • Go To  4

      No 

      • Go To  11
  4. CHECK THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT 
    1. Measure the voltage between the (G401) Driver Seat Horizontal Position Sense circuit and the (G491) Driver Seat Horizontal Sensor Ground circuit.

      Is the voltage above 11.0 volts?

      Yes 

      • Go To  5

      No 

      • Go To  12
  5. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT 
    1. Measure the voltage between ground and the (P115) Driver Seat Horizontal Forward Driver circuit.

      Is the voltage above 1.0 volt?

      Yes 

      • Go To  13

      No 

      • Go To  6
  6. CHECK THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT 
    1. Measure the voltage between ground and the (P117) Driver Seat Horizontal Rearward Driver circuit.

      Is the voltage above 1.0 volt?

      Yes 

      • Go To  14

      No 

      • Go To  7
  7. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT 
    1. Connect a 12-volt test light between ground and the (P115) Driver Seat Horizontal Forward Driver circuit.
    2. While observing the test light, move the Driver Seat Horizontal Switch in the forward position.
      NOTE:

      The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

      Does the test light illuminate brightly?

      Yes 

      • Go To  8

      No 

      • Go To  15
  8. CHECK THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT 
    1. Connect a 12-volt test light between ground and the (P117) Driver Seat Horizontal Rearward Driver circuit.
    2. While observing the test light, move the Driver Seat Horizontal Switch in the rearward position.

      Does the test light illuminate brightly?

      Yes 

      • Go To  9

      No 

      • Go To  17
  9. CHECK THE DRIVER SEAT HORIZONTAL REARWARD DRIVER 
    1. Connect a 12-volt test light between the (P115) Driver Seat Horizontal Forward Driver circuit and the (P117) Driver Seat Horizontal Rearward Driver circuit.
    2. While observing the test light, move the Driver Seat Horizontal Switch in the forward position.

      Does the test light illuminate brightly?

      Yes 

      • Go To  10

      No 

      • Go To  19
  10. CHECK THE DRIVER SEAT HORIZONTAL FORWARD DRIVER 
    1. While observing the test light, move the Driver Seat Horizontal Switch in the rearward position.

      Does the test light illuminate brightly?

      Yes 

      • Replace the Power Seat Track in accordance with the Service Information. Refer to DESCRIPTION .
      • Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  19
  11. CHECK THE (G401) DRIVER SEAT HORIZONTAL POSITION SENSE CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the MSMD C5 harness connector.
    3. Measure the resistance of the (G401) Driver Seat Horizontal Position Sense circuit between the Driver Seat Horizontal Adjuster Motor harness connector and the MSMD C5 harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (G401) Driver Seat Horizontal Position Sense circuit for and open or EXCESSIVE resistance.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  19
  12. CHECK THE (G491) DRIVER SEAT HORIZONTAL SENSOR GROUND CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the MSMD C5 harness connector.
    3. Measure the resistance of the (G491) Driver Seat Horizontal Sensor Ground circuit between the Driver Seat Horizontal Adjuster Motor harness connector and the MSMD C5 harness connector.

      Is the resistance above 5.0 Ohms.

      Yes 

      • Repair the (G491) Driver Seat Horizontal Sensor Ground circuit for an open or excessive resistance.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  19
  13. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Disconnect the MSMD C5 harness connector.
    2. Measure the voltage between ground and the (P115) Driver Seat Horizontal Forward Driver circuit.

      Is the voltage above 1.0 volt?

      Yes 

      • Repair the (P115) Driver Seat Horizontal Forward Driver circuit for a short to voltage.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  19
  14. CHECK THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Disconnect the MSMD C5 harness connector.
    2. Measure the voltage between ground and the (P117) Driver Seat Horizontal Rearward Driver circuit.

      Is the voltage above 1.0 volt?

      Yes 

      • Repair the (P117) Driver Seat Horizontal Rearward Driver circuit for a short to voltage.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  19
  15. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the MSMD C5 harness connector.
    3. Measure the resistance between ground and the (P115) Driver Seat Horizontal Forward Driver circuit.

      Is the resistance below 100K Ohms?

      Yes 

      • Repair the (P115) Driver Seat Horizontal Forward Driver circuit for a short to ground.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  16
  16. CHECK THE (P115) DRIVER SEAT HORIZONTAL FORWARD DRIVER CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE 
    1. Measure the resistance of the (P115) Driver Seat Horizontal Forward Driver circuit between the Driver Seat Horizontal Adjuster Motor harness connector and the MSMD C5 harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (P115) Driver Seat Horizontal Forward Driver circuit for an open or excessive resistance.
      • Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  19
  17. CHECK THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the MSMD C5 harness connector.
    3. Measure the resistance between ground and the (P117) Driver Seat Horizontal Rearward Driver circuit.

      Is the resistance below 100K Ohms?

      Yes 

      • Repair the (P117) Driver Seat Horizontal Rearward Driver circuit for a short to ground.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  18
  18. CHECK THE (P117) DRIVER SEAT HORIZONTAL REARWARD DRIVER CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE 
    1. Measure the resistance of the (P117) Driver Seat Horizontal Rearward Driver circuit between the Driver Seat Horizontal Adjuster Motor harness connector and the MSMD C5 harness connector.

      Is the resistance above 10 Ohms?

      Yes 

      • Repair the (P117) Driver Seat Horizontal Rearward Driver circuit for an open or excessive resistance.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  19
  19. MEMORY SEAT MODULE (MSMD) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and harness connectors between the Driver Seat Horizontal Adjuster Motor and the MSMD.
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Driver Seat Horizontal Adjuster Motor and MSMD harness connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      • Repair as necessary.
      • Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

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