Circuit Description
The theft deterrent control module checks the theft deterrent exciter module supply circuit for a constant voltage condition.
Conditions for Running the DTC
The theft deterrent control module must see the ignition switch input. The theft deterrent control module can not have DTC B1327 set as a current DTC.
Conditions for Setting the DTC
The theft deterrent control module requires 1 second to monitor the ignition key. After the first second, the VTD module turns off the power to the theft deterrent exciter module. If the theft deterrent control module senses the supply to the theft deterrent exciter module is 12 V for 1 second, the theft deterrent control module sets this DTC.
Action Taken When the DTC Sets
Important: The theft deterrent control module will enter fail enable state. The vehicle will not stall or stop running. If the theft deterrent control module is in a fail enable state when the ignition is turned to OFF, it will remain fail enable until the next time the vehicle is started. If the theft deterrent control module is fail enabled, the vehicle theft deterrent (VTD) system is NOT active and the vehicle will start.
| • | Stores DTC B2948 |
| • | The theft deterrent control module sends a class 2 message to the instrument cluster to illuminate the SECURITY indicator. |
Conditions for Clearing the MIL/DTC
The theft deterrent control module clears the current status of the DTC when it does not sense a 12 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 number below refers to the step number on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Theft Deterrent System Schematics Connector End View Reference: Theft Deterrent System Connector End Views | ||||
1 | Did you perform the Theft Deterrent Diagnostic System Check? | -- | Go to Step 2 | |
Does the voltage measure near the specified value? | 0 V | Go to Step 4 | Go to Step 3 | |
3 | Test the security system sensor supply circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 5 |
4 | Inspect for poor connections at the harness connector of the theft deterrent exciter module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 6 |
5 | Inspect for poor connections at the harness connector of the vehicle theft deterrent control module (VTD). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems . Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 7 |
6 | Replace the theft deterrent exciter module. Refer to Theft Deterrent Exciter Module Replacement . Did you complete the replacement? | -- | Go to Step 8 | -- |
7 |
Important: If a 10 Minute or 30 Minute Re-Learn Procedure is performed, all keys not learned at that time will be erased and will not be recognized. Perform the Adding Keys procedure on all keys or instruct the customer how to perform the Adding Keys procedure. Refer to Adding Keys .
Did you complete the replacement? | -- | Go to Step 8 | -- |
8 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
