Diagnostic Test

CHECK FOR ACTIVE FAULT WITH SEAT STATIONARY
1. Turn the ignition on.
2. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Cycle the ignition from on to off three times.
4. Turn the ignition on and wait 30 seconds.
5. Using a scan tool, read DTCs.
  Is DTC B1D71-SEAT FRONT VERTICAL POSITION SENSOR CIRCUIT LOW active?
  
  Yes
  - Go to 3
  No
  - Go to 2
CHECK FOR ACTIVE FAULT WHILE ADJUSTING THE SEAT
1. Move the seat switch in the front vertical adjust position three times.
2. Using a scan tool, read DTCs.
  Is DTC B1D71-SEAT FRONT VERTICAL POSITION SENSOR CIRCUIT LOW active?
  
  Yes
  - Go to 3
  No
  - The conditions that caused this code to set are not present at this time. Verify seat harness is routed correctly. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO GROUND

Fig 1: Measuring Resistance Of Driver Seat Front Vertical Position Sense Wire At Front Driver Vertical Seat Adjuster Motor Connector To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Memory Seat Module C3 harness connector.
3. Disconnect the Front Driver Vertical Seat Adjuster Motor harness connector.
  NOTE: Check connectors. Clean and repair as necessary.
4. Measure the resistance of the (G404) Driver Seat Front Vertical Position Sense circuit between ground and the Front Driver Vertical Seat Adjuster Motor connector.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (G404) Driver Seat Front Vertical Position Sense circuit for a short to ground.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
  No
  - Go to 4
CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO (G494) DRIVER SEAT FRONT VERTICAL SENSOR GROUND CIRCUIT, (P119) DRIVER SEAT FRONT VERTICAL UP DRIVER CIRCUIT, AND (P121) DRIVER SEAT FRONT VERTICAL DOWN DRIVER CIRCUIT

Fig 2: Checking Driver Seat Front Vertical Position Sense Circuit For Short To Driver Seat Front Vertical Circuits
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (G404) Driver Seat Front Vertical Position Sense circuit and the (G494) Driver Seat Front Vertical Sensor Ground circuit at the Front Driver Vertical Seat Adjuster Motor connector.
2. Measure the resistance between the (G404) Driver Seat Front Vertical Position Sense circuit and the (P119) Driver Seat Front Vertical Up Driver circuit at the Front Driver Vertical Seat Adjuster Motor connector.
3. Measure the resistance between the (G404) Driver Seat Front Vertical Position Sense circuit and the (P121) Driver Seat Front Vertical Down Driver circuit at the Front Driver Vertical Seat Adjuster Motor connector.
  Is the resistance below 10K Ohms for any measurement?
  
  Yes
  - Repair all circuits with a resistance below 10K Ohms for a short to the (G404) Driver Seat Front Vertical Position Sense circuit.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
  No
  - Go to 5
CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT AND THE (G494) DRIVER SEAT FRONT VERTICAL SENSOR GROUND CIRCUIT FUNCTION

Fig 3: Checking For Voltage In Driver Seat Front Vertical Position Sense Circuit Using 12V Test Light
Courtesy of CHRYSLER LLC
1. Reconnect the Memory Seat Module C3 connector.
2. Turn the ignition on.
3. Connect a 12-volt test light between the (G404) Driver Seat Front Vertical Position Sense circuit and the (G494) Driver Seat Front Vertical Sensor Ground circuit at the Front Driver Vertical Seat Adjuster Motor connector.
4. Move the seat switch in the front vertical adjust position.
  Does the test light illuminate for approximately two seconds then turn off with the seat switch engaged?
  
  Yes
  - Replace the Front Driver Vertical Seat Adjuster Motor assembly in accordance with the Service Information.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
  No
  - Replace the Memory Seat Module (MSM) in accordance with the Service Information.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .