GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 DeVille 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Content Theft Deterrent (CTD) Alarm Mode Inoperative

Step

Action

Yes

No

Schematic Reference: Theft Deterrent System Schematics

Connector End View Reference: Theft Deterrent System Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Make sure the rear compartment lid is closed completely.
  2. Turn ON the ignition, with the engine OFF.
  3. Observe the Trunk Open message on the driver information center.

Does the driver information center display TRUNK OPEN?

Go to Trunk Ajar Indicator Always On in Body Rear End

Go to Step 3

3
  1. Open the driver's window.
  2. Unlock the doors using the power door lock switch or the keyless entry transmitter.
  3. Remove the keys from the ignition.
  4. Open the driver's door.
  5. Observe the SECURITY indicator.

Does the SECURITY indicator flash?

Go to Step 4

Go to Courtesy Lamps Inoperative in Lighting Systems

4
  1. Lock the vehicle using the power door lock switches or the keyless entry transmitter.
  2. Observe the SECURITY indicator.

Does the SECURITY indicator change from flashing to on steady?

Go to Step 5

Go to Power Door Locks Inoperative in Doors

5
  1. Close all of the doors and rear compartment lid.

    2. Important: Ensure that all the doors and the rear compartment lid are closed. The Content Theft Deterrent (CTD) System will not arm itself without all of the doors and rear compartment lid being closed.

  2. Observe the SECURITY indicator.

Does the SECURITY indicator turn off in about 30 seconds?

Go to Step 6

Go to Courtesy Lamps Always On in Lighting Systems

6
  1. Reach in and manually unlock the driver's door.
  2. Open the driver's door.

Do all of the Alarm mode functions activate, parking lights flash and horn pulses?

Go to Step 7

Go to Step 8

7

Disarm the CTD system by inserting the door key into the driver door lock cylinder and rotate it to the unlock position.

Do all of the Alarm mode functions stop?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Content Theft Deterrent (CTD) Does Not Disarm with Key Lock

8

Do any of the alarm functions activate?

Go to Step 9

Go to Courtesy Lamps Inoperative in Lighting Systems

9

Do the horns pulse only?

Go to Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode

Go to Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode