Diagnostic Test

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, erase all DTC's.
3. Press the Driver Seat Switch in all directions several times.
4. Wait one minute.
5. With the scan tool, read DTC's.
  Does the scan tool display active: B1D63-POWER SEAT SWITCH OPEN?
  
  Yes
  - Go to step 2
  No
  - The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
(P309) DRIVER SEAT HORIZONTAL/REAR RISER SWITCH MUX CIRCUIT OPEN

Fig 1: Checking Driver Seat Horizontal/Rear Riser Switch MUX Circuit For Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Driver Seat Switch.
3. Disconnect the Memory Seat Module C3 harness connector.
4. Measure the resistance of the (P309) Driver Seat Horizontal/Rear Riser Switch MUX between the Driver Seat Switch harness connector and the Memory Seat Module C3 harness connector.
  Is the resistance below 3.0 ohms?
  
  Yes
  - Go to step 3
  No
  - Repair the (P309) Driver Seat Horizontal/Rear Riser Switch MUX for an open.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
(P311) DRIVER SEAT FRONT RISER SWITCH MUX CIRCUIT OPEN

Fig 2: Checking Driver Seat Front Riser Switch MUX Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (P311) Driver Seat Front Riser Switch MUX between the Driver Seat Switch harness connector and the Memory Seat Module C3 harness connector.
  Is the resistance below 3.0 ohms?
  
  Yes
  - Go to step 4
  No
  - Repair the (P311) Driver Seat Front Riser Switch MUX for an open.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
(P28) DRIVER SEAT SWITCH MUX RETURN CIRCUIT OPEN

Fig 3: Checking Driver Seat Switch MUX Return Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (P28) Driver Seat Switch MUX Return between the Driver Seat Switch harness connector and the Memory Seat Module C3 harness connector.
  Is the resistance below 3.0 ohms?
  
  Yes
  - Go to step 5
  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 .
(P29) DRIVER SEAT SWITCH MUX SUPPLY CIRCUIT OPEN

Fig 4: Checking Driver Seat Switch MUX Supply Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (P29) Driver Seat Switch MUX Supply between the Driver Seat Switch harness connector and the Memory Seat Module C3 harness connector.
  Is the resistance below 3.0 ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the (P29) Driver Seat Switch MUX Supply for an open.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
CHECK THE DRIVER SEAT SWITCH CIRCUIT RESISTANCES TO GROUND

Fig 5: Checking Driver Seat Switch Circuit Resistances To Ground
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and each of the Driver Seat Switch circuits at the Driver Seat Switch harness connector.
  Is the resistance above 10k ohms for each circuit?
  
  Yes
  - Go to step 7
  No
  - Repair the circuit(s) that measured below 10k ohms for a short to ground.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
CHECK THE MSM SENSOR SUPPLY AND SENSOR RETURN

Fig 6: Checking MSM Sensor Supply And Sensor For Return
Courtesy of CHRYSLER LLC
1. Reconnect the Memory Seat Module C3 harness connector.
2. Turn the ignition on.
3. Measure the voltage between the (P29) Driver Seat Switch MUX Supply circuit and the (P28) Driver Seat Switch MUX Return circuit at the Driver Seat Switch harness connector.
  Is the voltage above 11.0 volts?
  
  Yes
  - Go to step 8
  No
  - 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 .
DRIVER SEAT HORIZONTAL SWITCH

Fig 7: Checking Driver Seat Horizontal Switch
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Reconnect the Driver Seat Switch harness connector.
3. Turn the ignition on.
4. Backprobe and measure the voltage of the (P309) Driver Seat Horizontal Rear Riser Switch MUX circuit while moving the Driver Seat Switch horizontally and the rear riser up, down.
  NOTE: The Voltage readings for all positions should be between 1.0 volt and 5.0 volts.
  
  Is the voltage between 1.0 and 5.0 volts when the Driver Seat Switch is moved to each position?
  
  Yes
  - Go to step 9
  No
  - Replace the Driver Seat Switch.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .
DRIVER SEAT FRONT RISER SWITCH

Fig 8: Checking Driver Seat Front Riser Switch
Courtesy of CHRYSLER LLC
1. Backprobe and measure the voltage of the (P311) Driver Seat Front Riser MUX circuit while moving the Driver Seat Front Riser Switch forward and rearward.
  NOTE: The Voltage readings for all positions should be between 1.0 volt and 5.0 volts.
  
  Is the voltage between 1.0 and 5.0 volts when the Driver Seat Switch is moved to each position?
  
  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
  - Replace the Driver Seat Switch.
  - Perform POWER SEAT SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Memory Seat (MSMD) - Standard Procedure .