For a complete wiring diagram Refer to Section 8WWhen Monitored:Continuously while the VTSS is armed.Set Condition:If the Intrusion Transceiver Module does not receive messages from the Console Intrusion Sensor over the LIN bus.Possible CausesINTERMITTENT CONDITION(A412) FUSED B+ CIRCUIT OPEN(Z910) GROUND CIRCUIT OPEN(D122) LIN BUS CIRCUIT OPENCONSOLE INTRUSION SENSORINTRUSION TRANSCEIVER MODULE1. INTERMITTENT DTCWith the scan tool, erase the current Intrusion Transceiver Module DTC's.Turn the ignition off.Arm the VTSS and wait 1 minute.Disarm the VTSS and turn the ignition on.Using the scan tool, read ITM DTC(s).Does the scan tool display the same DTC?YesGo To2NoThe condition that caused this symptom is currently not present. Inspect the related wiring harness for a possible intermittent condition. Look for any chafed, pierced, pinched or partially broken wires.Perform BODY VERIFICATION TEST - VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 2. (A412) FUSED B+ OPEN

Disconnect the Console Intrusion Sensor connector.Using a 12-volt test light connected to ground, check the (A412) Fused B(+) circuit in the Console Intrusion Sensor connector.Does the test light illuminate brightly? YesGo To3NoRepair the (A412) Fused B+ circuit for an open.Perform BODY VERIFICATION TEST - VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 3. (Z910) GROUND CIRCUIT OPEN

Using a 12-volt test light connected to 12-volts, check the (Z910) Ground circuit at the Console Intrusion Sensor connector.Does the test light illuminate brightly?YesGo To4NoRepair the (Z910) Ground circuit for an open.Perform BODY VERIFICATION TEST - VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 4. LIN BUS VOLTAGE

Measure the voltage of the (D122) LIN Bus circuit at the Console Intrusion Sensor connector with the key on and off.Observe the voltage displayed on the voltmeter.Is the voltage between 1 and 12 volts?YesReplace the Console Intrusion Sensor in accordance with the Service Information.Perform BODY VERIFICATION TEST - VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoGo To55. (D122) LIN BUS CIRCUIT OPEN

Disconnect the Intrusion Transceiver Module harness connector.Measure the resistance of the (D122) LIN Bus circuit between the Intrusion Transceiver Module and the Console Intrusion Sensor connector.Is the resistance below 3.0 ohms?YesReplace the Intrusion Transceiver Module in accordance with the Service Information.Perform BODY VERIFICATION TEST - VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoRepair the (D122) LIN Bus circuit for an open.Perform BODY VERIFICATION TEST - VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)