*DIAGNOSTIC CAN C (+) AND/OR DIAGNOSTIC CAN C (-) CIRCUITS HIGH

For a complete wiring diagram Refer to Section 8W.

When Monitored:
When the scan tool queries the TIPM.
Set Condition:
The scan tool has detected a shorted high condition on either or both Diagnostic CAN C circuits.

Possible Causes

(D72) DIAGNOSTIC CAN C (+) CIRCUIT SHORTED TO VOLTAGE

(D71) DIAGNOSTIC CAN C (-) CIRCUIT SHORTED TO VOLTAGE

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.

NOTE: Ensure the scan tool is updated to the latest software.

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

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. DIAGNOSTIC CAN C CIRCUITS SHORTED TO VOLTAGE

Turn the ignition off.
Disconnect the TIPM C7 harness connector.
Disconnect the scan tool from the DLC.
Turn the ignition on.
Measure the voltage of the Diagnostic CAN C circuits.

Is the voltage above 6.0 volts for either circuit?

Yes

Repair the Diagnostic CAN C circuits for a short to voltage.

Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

No

Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Totally Integrated Power Module in accordance with the service information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).