Refer to one of the following Theft Deterrent System schematics:
Circuit Description
The vehicle theft deterrent (VTD) controller module checks the theft deterrent exciter module supply circuit for a no voltage condition.
Conditions for Running the DTC
The VTD controller module must see the ignition switch input. The VTD module can not have DTC B1327 set as a current DTC.
Conditions for Setting the DTC
If the VTDcontroller module senses the supply to the theft deterrent exciter module is 0 V for 1 second.
Action Taken When the DTC Sets
The VTDcontroller module will "fail enable" the VTD system and allow the vehicle to start. The VTD controller module will illuminate the security indicator.
Conditions for Clearing the MIL/DTC
The VTDcontroller module clears the current status of the DTC when it does not sense a 0 V condition on the theft deterrent exciter module supply circuit. The DTC will still be retrieved as current until the ignition switch is cycled. The DTC will become a history DTC at that time.
Diagnostic Aids
Refer to Testing for Intermittent Conditions and Poor Connections and Testing for Electrical Intermittents in Wiring Systems.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform A Diagnostic System Check - Theft Deterrent ? | -- | ||
Does the voltage measure near the specified value? | 12 V | |||
3 | Test the security system sensor supply voltage circuit for a short to ground. Refer to Circuit Testing in Wiring Systems. Did you find and correct the condition? | -- | ||
4 | Inspect for poor connections/terminal tension at the theft deterrent exciter module harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
5 | Inspect for poor connections/terminal tension at the vehicle theft deterrent (VTD) controller module harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems . Did you find and correct the condition? | -- | ||
6 | Replace the theft deterrent exciter module. Refer to Theft Deterrent Exciter Module Replacement . Did you complete the replacement? | -- | -- | |
7 |
Important: Perform the programming replacement keys, ignition cylinder or PCM procedure when replacing the theft deterrent controller module. Replace the Theft Deterrent Controller Module. Refer to Theft Deterrent Controller Module Replacement . Did you complete the replacement? | -- | -- | |
8 | Clear the diagnostic trouble codes. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | -- | System OK |
