U0019

U0019-CAN INTERIOR BUS

For a complete wiring diagram Refer to Diagrams/Electrical.


- When Monitored:
- Continuously.
- Set Condition:
- Whenever the CAN INTERIOR BUS (+) or INTERIOR BUS (-) circuit is open, shorted to voltage or shorted to ground, this code will set.







Diagnostic Test


1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase DTCs.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTCs.
Does the scan tool display: U0019-CAN INTERIOR BUS CIRCUIT?

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 appropriate VERIFICATION TEST.Body Verification Test




2. CHECK TOTALLY INTEGRATED POWER MODULE DTCs
With the scan tool, read Totally Integrated Power Module DTCs
Does the scan tool display any CAN INTERIOR BUS DTCs - ACTIVE?

Yes


- Diagnose and repair the active DTC(s).


No


- Go to 3
-




3. CAN INTERIOR BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the Amplifier C1 harness connector.
Disconnect the Totally Integrated Power Module C7 harness connector.
Measure the resistance of the (D265) CAN INTERIOR BUS (+) circuit between the Totally Integrated Power Module C7 harness connector and the Amplifier C1 harness connector.
Is the resistance below 2.0 ohms?

Yes


- Go To 4
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test


No


- Repair the CAN INTERIOR BUS (+) circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test




4. CAN INTERIOR BUS (-) CIRCUIT OPEN
Measure the resistance of the (D264) CAN INTERIOR BUS (-) circuit between the Totally Integrated Power Module C7 harness connector and the Amplifier C1 harness connector.
Is the resistance below 2.0 ohms?

Yes


- Replace the Amplifier.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test


No


- Repair the CAN INTERIOR BUS (-) circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test