Diagnostic Test

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase DTC's
3. Press the Seat Switch in all directions several times.
4. Wait one minute.
5. With the scan tool, read DTC's.
  Does the scan tool display B1D63-POWER SEAT SWITCH OPEN?
  
  Yes
  - Go to step 2
  No
  - The conditions that caused this code to set are not present at this time. Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
CHECK THE (P239) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT RESISTANCE

Fig 1: Checking Driver Seat Rear Vertical/Horizontal Switch MUX Circuit Resistance
Courtesy of CHRYSLER LLC
1. Disconnect the Memory Seat Module C4 connector.
  NOTE: Check connectors - Clean and repair as necessary.
2. Measure the resistance between the (P239) Driver Seat Rear Vertical/Horizontal Switch MUX circuit and the (P599) Driver Seat Switch MUX Return circuit in the C4 connector.
  Is the resistance 47.0 ohms + or - 1.0?
  
  Yes
  - Go to step 3
  No
  - Go to step 5
CHECK THE (P339) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX CIRCUIT RESISTANCE

Fig 2: Checking Driver Seat Front Vertical/Recliner Switch MUX Circuit Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (P339) Driver Seat Front Vertical/Recliner Switch MUX circuit and the (P599) Driver Seat Switch MUX Return circuit in the C4 connector.
  Is the resistance 47.0 ohms + or - 1.0?
  
  Yes
  - Replace the Memory Seat Module 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 step 4
CHECK THE (P339) DRIVER SEAT FRONT VERTICAL/RECLINER SWITCH MUX WIRE RESISTANCE

Fig 3: Checking Driver Seat Front Vertical/Recliner Switch MUX Wire Resistance
Courtesy of CHRYSLER LLC
1. Disconnect the Driver Seat Switch.
  NOTE: Check connectors - Clean and repair as necessary.
2. Measure the resistance of the (P339) Driver Seat Front Vertical/Recliner Switch MUX circuit between the C4 connector and the Driver Seat Switch connector.
  Is the resistance below 1.0 ohm?
  
  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 (P339) 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 (P239) DRIVER SEAT REAR VERTICAL/HORIZONTAL SWITCH MUX WIRE RESISTANCE

Fig 4: Checking Driver Seat Rear Vertical/Horizontal Switch MUX Wire Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (P239) Driver Seat Rear Vertical/Horizontal Switch MUX circuit between the C4 connector and the Driver Seat Switch connector.
  Is the resistance below 1.0 ohm?
  
  Yes
  - Go to step 6
  No
  - Repair the (P239) 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 (P599) DRIVER SEAT SWITCH MUX RETURN WIRE RESISTANCE

Fig 5: Checking Driver Seat Switch MUX Return Wire Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (P599) Driver Seat Switch MUX Return circuit between the C4 connector and the Driver Seat Switch connector.
  Is the resistance below 1.0 ohm?
  
  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 (P599) 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 .