Diagnostic Test

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Press the seat switch in all directions several times then wait one minute.
4. Using a scan tool, read DTCs.
  Does the scan tool display: B1D63-POWER SEAT SWITCH OPEN?
  
  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 (P309) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT RESISTANCE

Fig 1: Measuring Resistance Between Driver Seat Front Vertical/Recliner Sw MUX Circuit & Driver Seat Sw MUX Return Circuit In C4 Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Memory Seat Module C4 connector.
  NOTE: Check connectors. Clean and repair as necessary.
3. Measure the resistance between the (P309) Driver Seat Rear Vertical/Horizontal Switch MUX circuit and the (P28) Driver Seat Switch MUX Return circuit at the Memory Seat Module C4 connector.
  Is the resistance 47.0 Ohms + or - 1.0?
  
  Yes
  - Go to 3
  No
  - Go to 5
CHECK THE (P311) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX CIRCUIT RESISTANCE

Fig 2: Measuring Resistance Between Driver Seat Rear Vertical/Horizontal Sw MUX Circuit & Driver Seat Sw MUX Return Circuit In C4 Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (P311) Driver Seat Front Vertical/Recliner Switch MUX circuit and the (P28) Driver Seat Switch MUX Return circuit at the Memory Seat Module C4 connector.
  Is the resistance 47.0 Ohms + or - 1.0?
  
  Yes
  - 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
  - Go to 4
CHECK THE (P311) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX CIRCUIT FOR AN OPEN

Fig 3: Measuring Resistance Of Driver Seat Rear Vertical/Horizontal Sw Mux Circuit Between C4 Connector & Driver Seat Sw Connector
Courtesy of CHRYSLER LLC
1. Disconnect the Driver Seat Switch connector.
  NOTE: Check connectors. Clean and repair as necessary.
2. Measure the resistance of the (P311) Driver Seat Front Vertical/Recliner Switch MUX circuit between the Memory Seat Module C4 connector and the Driver Seat Switch connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Driver Seat Switch in accordance with the Service Information.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
  No
  - Repair the (P311) Driver Seat Front Vertical/Recliner Switch MUX circuit for an open.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
CHECK THE (P309) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT FOR AN OPEN

Fig 4: Measuring Resistance Of Driver Seat Front Vertical/Recliner Sw Mux Circuit Between The C4 Connector & Driver Seat Sw Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (P309) Driver Seat Rear Vertical/Horizontal Switch MUX circuit between the Memory Seat Module C4 connector and the Driver Seat Switch connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to 6
  No
  - Repair the (P309) Driver Seat Rear Vertical/Horizontal Switch MUX circuit for an open.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
CHECK THE (P28) DRIVER SEAT SWITCH MUX RETURN CIRCUIT FOR AN OPEN

Fig 5: Measuring Resistance Of Driver Seat Sw MUX Return Circuit Between C4 Connector & Driver Seat Sw Connector
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (P28) Driver Seat Switch MUX Return circuit between the Memory Seat Module C4 connector and the Driver Seat Switch connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Driver Seat Switch in accordance with the Service Information.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
  No
  - Repair the (P28) Driver Seat Switch MUX Return circuit for an open.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .