GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Blazer - 4WD - RHD 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Content Theft Deterrent (CTD) Does Not Disarm with Key Lock

Step

Action

Value(s)

Yes

No

1

Was the Content Theft Deterrent (CTD) System Check performed?

--

Go to Step 2

Go to Content Theft Deterrent (CTD) System Check

2
  1. Turn the ignition switch to the RUN position.
  2. With 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. With a scan tool, select Body Control Module, and Security Data.
  3. Monitor the door key switch.
  4. Insert the ignition key into the drivers door lock switch.
  5. Turn and hold the door lock switch to 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 switch.
  2. With a scan tool, monitor the door key switch.
  3. Turn and hold the door lock switch to 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 C3.
  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 switch.
  2. With a scan tool, monitor the door key switch.
  3. Turn and hold the door lock switch to 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 RH mini-wedge (door lock cylinder switch) connector C3.
  2. With 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 fuse jumper wire between CKT 262 (LT GRN) cavity A to CKT 1850 (BLK) cavity C of the RH mini-wedge connector C3.
  2. With 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 LH mini-wedge (door lock cylinder switch) connector C3.
  2. With a scan tool, monitor the door key switch.
  3. Connect a fused jumper wire between CKT 262 (LT GRN) cavity B and ground.

Does the scan tool display the specified value?

ACTIVE

Go to Step 10

Go to Step 15

10
  1. Connect a fuse jumper wire between CKT 262 (LT GRN) cavity B to CKT 1850 (BLK) cavity A of the LH mini-wedge connector C3.
  2. With 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. With a scan tool monitor the door key switch.
  2. Disconnect the purple BCM connector C3.

Does the scan tool display the specified value?

INACTIVE

Go to Step 12

Go to Step 22

12
  1. Reconnect the purple BCM connector C3.
  2. Disconnect the LH mini-wedge (door lock cylinder switch) connector C3.
  3. With 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 RH mini-wedge (door lock cylinder switch) connector C3.
  2. With 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 CKT 262 (LT GRN) between the BCM and the RH mini-wedge (door lock cylinder switch).

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

15

Locate and repair the open CKT  262 (LT GRN) between the LH mini-wedge (door lock cylinder switch) and connector C203.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

16

Locate and repair the open CKT 1850 (BLK) between the LH mini-wedge and grounds G200/G201.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

17

Replace the LH mini-wedge (door lock cy;inder switch).

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 connector C203.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

19

Replace the RH mini-wedge (door lock cylinder switch).

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

20

Locate and repair the open CKT  262 (LT GRN) between the RH mini-wedge (door lock cylinder switch) and connector C203.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

21

Locate and repair the open CKT 1850 (BLK) between the RH mini-wedge and ground G202.

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--

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

Is the repair complete?

--

Go to Content Theft Deterrent (CTD) System Check

--