B2955

CIRCUIT DESCRIPTION
The vehicle theft deterrent (VTD) controller module checks the theft deterrent exciter module key data signal circuit for a constant voltage condition.

CONDITIONS FOR RUNNING THE DTC
The theft deterrent controller module must see the ignition switch input. The theft deterrent controller module must have DTC B3055, key Not Present, set as a current DTC. The theft deterrent controller module can not have a B1327 DTC set as a current DTC.

CONDITIONS FOR SETTING THE DTC
The theft deterrent controller module requires 1 second to monitor the ignition key. After the first second, the theft deterrent controller module turns off the power to the theft deterrent exciter module. If the theft deterrent controller module senses the key data signal circuit to the theft deterrent exciter module is 12 V for 1 second, the VTD sets this DTC.

ACTION TAKEN WHEN THE DTC SETS
When the vehicle is running, the theft deterrent controller module will allow the vehicle to continue running. If the 12 V is detected on the key data signal circuit with the engine off, the theft deterrent controller module will prevent a start. The theft deterrent controller module will illuminate the security indicator.

CONDITIONS FOR CLEARING THE MIL/DTC
The theft deterrent controller module clears the current status of the DTC when it does not sense a 12 V condition on the theft deterrent exciter module key data signal 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.

TEST DESCRIPTION

Steps 1-8:

The numbers below refer to the step numbers on the diagnostic table.
2. Make sure the ground used is separate from the grounds used by the vehicle theft deterrent controller module. Voltage measurement must not interfere with possible isolated module ground.