Audio/Video

U0019-CAN INTERIOR BUS

For a complete wiring diagram Consult 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.

Possible Causes:

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 BODY VERIFICATION TEST - VER 1 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 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