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 an open condition on the (D71) Diagnostic CAN C (-) circuit.Possible Causes(D71) DIAGNOSTIC CAN C (-) CIRCUIT OPENTOTALLY INTEGRATED POWER MODULE1. CHECK THE STATUS OF THE ERROR MESSAGEEnsure 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.Does the scan tool display this same error message?YesGo To 2 NoThe 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. (D71) DIAGNOSTIC CAN C (-) CIRCUIT OPEN

Turn the ignition off.Disconnect the TIPM C7 harness connector.Disconnect the scan tool from the DLC.Measure the resistance of the (D71) Diagnostic CAN C (-) circuit between the TIPM C7 harness connector and the DLC.Is the resistance below 5.0 ohms?YesInspect 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).NoRepair the (D71) Diagnostic CAN C (-) circuit for an open.Perform the BODY VERIFICATION TEST – VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).