Both Diagnostic CAN C (+) and Diagnostic CAN C (-) Circuits Open

BOTH CAN C DIAGNOSTIC (+) AND CAN C DIAGNOSTIC (-) CIRCUITS OPEN

Both CAN C Diagnostic (+) And Can C Diagnostic (-) Circuits Open:

WHEN MONITORED
When the scan tool queries the TIPM.

SET CONDITION
The scan tool has detected an open condition on both CAN C Diagnostic circuits.

POSSIBLE CAUSES
- (D72) CAN C diagnostic (+) circuit open
- (D71) CAN C diagnostic (-) circuit open
- Totally integrated power module

Diagnostic Test

1. CHECK THE STATUS OF THE ERROR MESSAGE

NOTE:
- Ensure the vehicle being tested is a CAN BUS VEHICLE. If not, false error messages may be displayed.
- Ensure the scan tool is updated to the latest software.

With the scan tool, record the error message.
Disconnect the scan tool from the DLC.
Cycle the ignition from on to off 3 times.
Turn the ignition on.

Q: Does the scan tool display this same error message?

YES: Go To 2
NO: The conditions that caused this error message to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.




2. (D72) CAN C DIAGNOSTIC (+) CIRCUIT OPEN

Turn the ignition off.
Disconnect the Totally Integrated Power Module harness connector.
Disconnect the scan tool from the DLC.

NOTE: Check the connectors at both the DLC and the TIPM.

Measure the resistance of the (D72) CAN C Diagnostic (+) circuit between the TIPM connector and the DLC.

Q: Is the resistance below 5.0 ohms?

YES: Go To 3
NO: Repair the (D72) CAN C Diagnostic (+) circuit for an open. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test




3. (D71) CAN C DIAGNOSTIC (-) CIRCUIT OPEN

Measure the resistance of the (D71) CAN C Diagnostic (-) circuit between the TIPM connector and the DLC.

Q: Is the resistance below 5.0 ohms?

YES: Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Totally Integrated Power Module. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (D71) CAN C Diagnostic (-) circuit for an open. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test