GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Corvette 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 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

DEFINITION: The CTD system will not ARM or DISARM properly.

1

Did you perform the Theft Deterrent Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2
  1. Open the driver and passenger windows.
  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 passenger door.
  5. Observe the SECURITY indicator.
  6. Close the passenger door and open the driver's door.
  7. Observe the SECURITY indicator.

Does the SECURITY indicator flash when the passenger and driver's door are open?

Go to Step 3

Go to Door Ajar Indicator Inoperative in Doors

3
  1. With the driver's door open, lock the vehicle using the power door lock switch or the keyless entry transmitter.
  2. Observe the SECURITY indicator.

Does the SECURITY indicator change from flashing to on steady?

Go to Step 4

Go to Power Door Lock Inoperative - Driver Door in Doors

4
  1. Close all of the doors.

    2. Important: Ensure that all the doors and hatch/trunk are closed. The Content Theft Deterrent System will not arm itself without all of the doors and hatch/trunk being closed.

  2. Observe the SECURITY indicator.

Does the SECURITY indicator transition to OFF?

Go to Step 5

Go to Door Ajar Indicator Inoperative in Doors

5
  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 6

Go to Step 7

6

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

7

Do any of the alarm functions activate?

Go to Step 8

Go to Door Ajar Indicator Inoperative in Doors

8

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