Memory Seat Module (MSMD)

U0019-CAN B BUS





For a complete wiring diagram, refer to the Wiring Information. Electrical Diagrams

- When Monitored:
Continuously.

- Set Condition:
Whenever the (D55) CAN B Bus (+) or (D54) CAN B Bus (-) circuit is open, shorted to voltage or shorted to ground, this code will set.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the Diagnostic Trouble Codes (DTCs).
3. Cycle the ignition from on to off three times.
4. Turn the ignition on.
5. Using the scan tool, read the DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK TIPM DTCS
1. Using the scan tool, read the TIPM DTCs.

Does the scan tool display any CAN B BUS DTCs - ACTIVE?

Yes

- Testing and Inspection Perform the appropriate diagnostic procedure.

No

- Go To 3

3. (D55) CAN B BUS (+) CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Memory Seat Module C1 harness connector.
3. Disconnect the TIPM C5 harness connector.
4. Measure the resistance of the (D55) CAN B Bus (+) circuit between the TIPM C5 harness connector and the Memory Seat Module C1 harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 4

No

- Repair the (D55) CAN B Bus (+) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. (D54) CAN B BUS (-) CIRCUIT OPEN




1. Measure the resistance of the (D54) CAN B Bus (-) circuit between the TIPM C5 harness connector and the Memory Seat Module C1 harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Memory Seat Module.
- Perform the POWER SEAT SYSTEM VERIFICATION TEST. Power Seat System Verification Test.

No

- Repair the (D54) CAN B Bus (-) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.