For a complete wiring diagramRefer to Section 8W.When Monitored:Ignition run time is greater than 1 second. Battery voltage between 9 and 16 volts. Engine run time greater than 3 seconds.Set Condition:The PCM doesn't receive a SKREEM message over the CAN C circuit for 7 consecutive seconds. The circuit is continuously monitored.Possible CausesCAN C BUS OPEN OR SHORTED CONDITIONNO POWER TO VEHICLE SECURITY CONTROL MODULE (SKREEM) — MODULE UNPLUGGED OR OPEN FUSEPOWERTRAIN CONTROL MODULE (PCM)Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.1. ACTIVE DTCFor vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.Check the IOD fuse before continuing. If the fuse is open, check the circuit for a short to ground.Turn the ignition on.With a scan tool, select View DTCs.Is the DTC Active at this time?YesRefer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.NoRefer to the INTERMITTENT CONDITION Diagnostic Procedure.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)