GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Park Avenue 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Content Theft Deterrent (CTD) Does Not Disarm with Key Lock

Step

Action

Value(s)

Yes

No

1

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

--

Go to Step  2

Go to Content Theft Deterrent (CTD) System Check

2
  1. Turn the ignition switch to the ON position.
  2. Install the scan tool.
  3. Select the following items:
    4. • The driver door module (DDM)
    • The Data Display
    • The Inputs
  4. Operate the left and the right front door lock cylinder switches.

Does the scan tool show an input for both front door lock switches?

--

Go to Step  3

Go to Step  4

3

Replace the remote function actuator (RFA) module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry.

Did you complete the repair?

--

Go to Content Theft Deterrent (CTD) System Check

--

4
  1. Disconnect connector C3 of the malfunctioning front door lock cylinder switch.
  2. Operate the malfunctioning door lock cylinder switch while you use a digital multimeter (DMM) in order to measure the resistance.
  3. Measure the resistance of the front door lock cylinder switch, connector C3, and the corresponding terminals:
    4. • For the left door, terminal J and terminal K
    • For the right door, terminal G and terminal H

Is the resistance within the specified range?

0-5 ohms

Go to Step  5

Go to Step  6

5

Replace the door module in the appropriate door. Refer to Front Door Module Replacement in Doors.

Did you complete the repair?

--

Go to Content Theft Deterrent (CTD) System Check

--

6

Test for an open or a short to ground in the following circuits:

    • The LH front door lock cylinder switch 262 (LT GRN)
    • The RH front door lock cylinder switch 265 (LT GRN/WHT)

Are the circuits OK?

--

Go to Step  8

Go to Step  7

7

Repair the open or the short to ground in the following circuits:

    • The LH front door lock cylinder switch 262 (LT GRN)
    • The RH front door lock cylinder switch 265 (LT GRN/WHT)
        Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Content Theft Deterrent (CTD) System Check

--

8

Test for an open or a short to ground in the following circuits:

    • The LH front door lock cylinder switch 536 (LT GRN/BLK)
    • The RH front door lock cylinder switch 537 (LT GRN/BLK)

Are the circuits OK?

--

Go to Step  10

Go to Step 9

9

Repair the open or the short to ground in the following circuits:

    • The LH front door lock cylinder switch 536 (LT GRN/BLK)
    • The RH front door lock cylinder switch 537 (LT GRN/BLK)
        Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Content Theft Deterrent (CTD) System Check

--

10

Replace the malfunctioning front door lock cylinder switch. Refer to Door Lock Cylinder Replacement in Doors.

Did you complete the repair?

--

Go to Content Theft Deterrent (CTD) System Check

--