GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Sonoma Pickup - 4WD 🢒 Body and Accessories 🢒 Body Control System 🢒 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 RUN position.
  2. Using a scan tool, select Body Control Module and Security Data.
  3. Monitor the Door Key Switch.

Does the scan tool display the specified value?

INACTIVE

Go to Step 3

Go to Step 11

3
  1. Turn the ignition switch to the OFF position.
  2. Using a scan tool, select Body Control Module and Security Data.
  3. Monitor the Door Key Switch.
  4. Insert the ignition key into the driver's door lock cylinder.
  5. Turn and hold the door lock cylinder to the UNLOCK position.

Does the scan tool display the specified value?

ACTIVE

Go to Step 6

Go to Step 4

4
  1. Insert the ignition key into the passenger door lock cylinder.
  2. Using a scan tool, monitor the Door Key Switch.
  3. Turn and hold the door lock cylinder to the UNLOCK position.

Does the scan tool display the specified value?

ACTIVE

Go to Step 9

Go to Step 5

5
  1. Remove the combs from the BCM connector C1 (BRN).
  2. Backprobe CKT 262 (LT GRN) cavity B3 with a fused jumper wire to ground.

Does the scan tool display the specified value?

ACTIVE

Go to Step 18

Go to Step 22

6
  1. Insert the ignition key into the passenger door lock cylinder.
  2. Using a scan tool, monitor the Door Key Switch.
  3. Turn and hold the door lock cylinder to the UNLOCK position.

Does the scan tool display the specified value?

ACTIVE

Go to Content Theft Deterrent (CTD) System Check

Go to Step 7

7
  1. Disconnect the right door lock cylinder.
  2. Using a scan tool, monitor the Door Key Switch.
  3. Connect a fused jumper wire between CKT 262 (LT GRN) cavity A and ground.

Does the scan tool display the specified value?

ACTIVE

Go to Step 8

Go to Step 20

8
  1. Connect a fused jumper wire between CKT 262 (LT GRN) cavity A to CKT 1050 (BLK) cavity B of the right door lock cylinder.
  2. Using the scan tool, monitor the Door Key Switch.

Does the scan tool display the specified value?

ACTIVE

Go to Step 19

Go to Step 21

9
  1. Disconnect the left door lock cylinder.
  2. Using a scan tool, monitor the Door Key Switch.
  3. Connect a fused jumper wire between CKT 262 (LT GRN) cavity D and ground.

Does the scan tool display the specified value?

ACTIVE

Go to Step 10

Go to Step 15

10
  1. Connect a fused jumper wire between CKT 262 (LT GRN) cavity D to CKT 1850 (BLK) cavity B of the left door lock cylinder.
  2. Using the scan tool, monitor the Door Key Switch.

Does the scan tool display the specified value?

ACTIVE

Go to Step 17

Go to Step 16

11
  1. Using a scan tool, monitor the Door Key Switch.
  2. Disconnect the BCM connector C3 (PPL).

Does the scan tool display the specified value?

INACTIVE

Go to Step 12

Go to Step 22

12
  1. Reconnect the BCM connector C3 (PPL).
  2. Disconnect the left door lock cylinder.
  3. Using a scan tool, monitor the Door Key Switch.

Does the scan tool display the specified value?

INACTIVE

Go to Step 17

Go to Step 13

13
  1. Disconnect the right door lock cylinder.
  2. Using a scan tool, monitor the Door Key Switch.

Does the scan tool display the specified value?

INACTIVE

Go to Step 19

Go to Step 14

14

Locate and repair the open in CKT 262 (LT GRN) between the BCM and either door lock cylinder.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

15

Locate and repair the open in CKT 262 (LT GRN) between the left door lock cylinder and C200.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

16

Locate and repair the open in CKT 1850 (BLK) between the left door lock cylinder and G203.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

17

Replace the left door lock cylinder.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

18

Locate and repair the open in CKT 262 (LT GRN) between the BCM and C200.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

19

Replace the right door lock cylinder.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

20

Locate and repair the open CKT 262 (LT GRN) between the right door lock cylinder and C200.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

21

Locate and repair the open in CKT 1050 (BLK) between the door lock cylinder and G200.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

22
  1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
  2. Program the BCM with the proper calibrations. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
  3. Perform the Learn Procedure.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--