Diagnostic Test

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Move the seat switch in the front vertical adjust position three times.
4. Using a scan tool, read DTCs.
  Does the scan tool display DTC B1D72-SEAT FRONT VERTICAL POSITION SENSOR CIRCUIT HIGH?
  
  Yes
  - Go to 2
  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 VOLTAGE WITH MSM DISCONNECTED

Fig 1: Checking Driver Seat Front Vertical Position Sense Circuit For Short To Voltage With MSM Disconnected
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Front Driver Vertical Seat Adjuster Motor harness connector.
3. Disconnect the MSM C3 harness connector.
  NOTE: Check connectors. Clean and repair as necessary.
4. Turn the ignition on.
5. Measure the voltage of the (G404) Driver Seat Front Vertical Position Sense circuit between the Driver Horizontal Seat Adjuster Motor connector and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (G404) Driver Seat Front Vertical Position Sense circuit for a short to voltage.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
  No
  - Go to 3
CHECK THE (G404) DRIVER SEAT FRONT VERTICAL POSITION SENSE CIRCUIT FOR A SHORT TO VOLTAGE WITH MSM CONNECTED

Fig 2: Checking Driver Seat Front Vertical Position Sense Circuit For Short To Voltage With MSM Connected
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Reconnect the MSM C3 harness connector.
3. Connect the positive lead of a voltmeter to the (G404) Driver Seat Front Vertical Position Sense circuit at the Front Driver Vertical Seat Adjuster Motor connector and the negative lead to a good clean chassis ground.
4. Turn off all vehicle interior and exterior lighting.
5. Mark sure all doors are closed then wait 10 seconds.
6. Measure the voltage of the (G404) Driver Seat Front Vertical Position Sense circuit.
  Is there any voltage present?
  
  Yes
  - Check the (G404) Driver Seat Front Vertical Position Sense circuit for a short to voltage from another circuit and repair as necessary. If circuit is okay, 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 .
  No
  - 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 .