Diagnostic Test

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Using a scan tool, read Memory Seat Module (MSM) DTCs.
  Does the scan tool display active: U0019-CAN B BUS?
  
  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. Attempt to reproduce condition by adjusting the seat.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK FOR ACTIVE CAN B BUS DTCs IN THE FRONT CONTROL MODULE (FCM)
1. Using a scan tool, read Front Control Module (FCM) DTCs.
  Does the scan tool display any active CAN B BUS DTCs?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Diagnosis and Testing and perform the appropriate diagnostic procedure.
  No
  - Go to 3
CHECK (D54) CAN B BUS (-) CIRCUIT FOR AN OPEN

Fig 1: Checking CAN B Bus (-) Circuit For Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Memory Seat Module C1 connector.
3. Disconnect the Front Control Module C1 connector.
4. Measure the resistance of the (D54) CAN B Bus (-) circuit between the Front Control Module C1 connector and the Memory Seat Module C1 connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Go to 4
  No
  - Repair the (D54) CAN B Bus (-) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK (D55) CAN B BUS (+) CIRCUIT FOR AN OPEN

Fig 2: Checking CAN B Bus (+) Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (D55) CAN B Bus (+) circuit between the Front Control Module C1 connector and the Memory Seat Module C1 connector.
  Is the resistance below 2.0 Ohms?
  
  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
  - Repair the (D55) CAN B Bus (+) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .