GM Service Manual Online
For 1990-2009 cars only

Content Theft Deterrent Alarm Mode Imperative

Step

Action

Value(s)

Yes

No

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

1

Did you perform the Content Theft Deterrent (CTD) System check?

--

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

  1. Turn off the ignition
  2. Open the driver or passenger door.
  3. Press the driver or passenger power door lock switch.
  4. Close both the driver and passenger doors (CTD System is now ARMED).

Does the CDT system ARM properly?

--

Go to Step 3

Go to Step 6

3

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

Does the CTD system DISARM properly from both doors?

--

Go to Step 8

Go to Step 4

4

Disarm the CTD system by pressing the UNLOCK button on the remote transmitter.

Does the CTD system DISARM properly?

--

Go to Content Theft Deterrent (CTD) System Check

Go to Step 5

5

Using a scan tool, try to establish communications with the driver door module (DDM) and remote function actuator (RFA) systems.

Can the scan tool communicate with the DDM and RFA systems?

--

Go to Step 9

Go to Step 7

6

  1. Turn OFF the ignition.
  2. Close the driver and passenger doors.
  3. Press the LOCK button on the remote transmitter.

Does the CTD system ARM properly?

--

Go to Diagnostic System Check - Power Door Systems in Doors.

Go to Step 5

7

Repair the no communication malfunction to the system that could not communicate with the scan tool. Refer to Diagnostic System Check - Data Link Communications in Data Link Communications.

Did you complete the repair?

--

Go to Step 10

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8

Inspect the following circuits for an intermittent malfunction:

    • Driver door jamb switch.
    • Passenger door jamb switches.
    • Intermittent communications between the DDM or RFA systems.
    • Power door lock switches.
    • Rear lid tamper switch.

Did you find and correct the condition?

--

Go to Step 10

Go to Content Theft Deterrent (CTD) System Check

9

Replace the RFA module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry.

Is the repair complete?

--

Go to Step 10

--

10

  1. Turn OFF the ignition.
  2. Connect or install any connectors or components that were disconnected or removed.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

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