U0019-CAN B BUS
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Continuously
- Set Condition:
Whenever the CAN B Bus (+) or CAN B Bus (–) circuit is open, shorted to voltage or shorted to ground.
| Possible Causes |
| CAN B BUS DTCs IN TIPM |
| (D55) CAN B BUS (+) CIRCUIT OPEN |
| (D54) CAN B BUS (-) CIRCUIT OPEN |
| SKREEM |
Diagnostic Test
1. CHECK FOR ACTIVE DTCsWith the scan tool, read the active DTCs.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
With the scan tool, read the active DTCs.
Does the scan tool display this DTC as active?
Yes
- Go To 2
No
- If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. CHECK TIPM DTCs
With the scan tool, read TIPM active DTCs.
Does the scan tool display any CAN B BUS DTC's - ACTIVE?
Yes
No
- Go To 3
3. (D55) CAN B BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the negative battery cable.
Disconnect the SKREEM connector.
Disconnect the TIPM connector.
Measure the resistance of the (D55) CAN B Bus (+) circuit between the TIPM harness connector and the SKREEM 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 BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
4. (D54) CAN B BUS (–) CIRCUIT OPEN
Measure the resistance of the (D54) CAN B Bus (–) circuit between the TIPM harness connector and the SKREEM harness connector.
Is the resistance below 2.0 ohms?
Yes
- Replace the SKREEM in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Repair the (D54) CAN B Bus (–) circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)