U0020-CAN B BUS OFF PERFORMANCE





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Continuously

  • Set Condition:

    The Memory Seat Module detects the (D55) CAN B Bus (+) circuit or (D54) CAN B Bus (-) circuit open.


Possible Causes
  
(D55) CAN B BUS (+) CIRCUIT OPEN
  
(D54) CAN B BUS (-) CIRCUIT OPEN
  
MEMORY SEAT MODULE
  



Diagnostic Test

1.TEST FOR INTERMITTENT CONDITION







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.

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







Is there any voltage present?

Yes
  • Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Memory Seat Module in accordance with the service information.
  • Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.


No
  • Repair the (D55) CAN B Bus (+) circuit for an open.
  • Perform BODY VERIFICATION TEST - VER 1.

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







Is there any voltage present?

Yes
  • Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Memory Seat Module in accordance with the service information.
  • Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.


No
  • Repair the (D54) CAN B Bus (-) circuit for an open.
  • Perform BODY VERIFICATION TEST - VER 1.