For a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition on.Battery voltage between 10 and 16 volts.IOD fuse installed.TIPM is configured correctly.Set Condition:Bus messages not received from the Intrusion Transceiver Control Module (ITM) for approximately 2 to 5 seconds.Possible CausesCAN C INTERIOR BUS (125K) CIRCUITS OPEN OR SHORTEDDTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGESTIPM NOT CONFIGURED CORRECTLYINTRUSION TRANSCEIVER CONTROL MODULE POWER AND GROUNDINTRUSION TRANSCEIVER CONTROL MODULEMODULE THAT SET THIS DTC1. VERIFY DTC IS ACTIVEEnsure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.With the scan tool, read active DTCs.Is this DTC active?YesGo To 2NoRefer to the Stored Lost Communication test procedure. Refer to the table of contents in this section.2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCSWith the scan tool, read active DTCs from all modules.Check for TIPM configuration, CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.Does the scan tool display any active DTCs to the conditions listed above?YesDiagnose and repair the DTC. Refer to the Index for a complete list of the symptoms.NoGo To 33. VERIFY THAT THE ITM IS ACTIVE ON THE BUSTurn the ignition on.With the scan tool, select Network Diagnostics.Verify that the ITM is active on the bus.Is the ITM active on the bus?YesGo To 4NoRefer to the No Response test procedure. Refer to the table of contents in this section.4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCSWith the scan tool, select Network Diagnostics.Is there more than one module with active DTCs “Logged Against” the ITM?YesReplace/update the Intrusion Transceiver Control Module in accordance with the service information.Perform the BODY VERIFICATION TEST – VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).NoReplace/update the module that set the DTC in accordance with the service informationPerform the appropriate VERIFICATION TEST.