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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Yukon XL Denali 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Content Theft Deterrent (CTD) Does Not Disarm with Key Lock

Step

Action

Value(s)

Yes

No

Schematic Reference: Theft Deterrent System Schematics

Connector End View Reference: Theft Deterrent System Connector End Views

DEFINITION: The content theft deterrent (CTD) system does not disarm when the vehicle is unlocked with the key.

1

Did you perform the Diagnostic System Check - Vehicle?

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Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Turn ON the ignition with the engine OFF.
  2. With a scan tool, observe the door key switch parameter in the Body Control Module (BCM) Security Data List.

Does the scan tool display INACTIVE?

INACTIVE

Go to Step 3

Go to Step 11

3
  1. Turn OFF the ignition.
  2. With a scan tool, observe the door key switch parameter in the BCM Data List.
  3. Insert the ignition key into the driver door lock cylinder.
  4. Turn and hold the door lock cylinder to the UNLOCK position.

Does the scan tool display ACTIVE?

ACTIVE

Go to Step 6

Go to Step 4

4
  1. Insert the ignition key into the passenger door lock cylinder.
  2. With a scan tool, observe the door key switch parameter in the BCM Data List.
  3. Turn and hold the door lock cylinder to the UNLOCK position.

Does the scan tool display ACTIVE?

ACTIVE

Go to Step 9

Go to Step 5

5
  1. Connect a 3-amp fused jumper wire between the signal circuit of the door key switch and ground.
  2. With a scan tool, observe the door key switch parameter in the BCM Data List.

Does the scan tool display ACTIVE?

ACTIVE

Go to Step 8

Go to Step 18

6
  1. Insert the ignition key into the passenger door lock cylinder.
  2. With a scan tool, observe the door key switch parameter in the BCM Data List.
  3. Turn and hold the door lock cylinder to the UNLOCK position.

Does the scan tool display ACTIVE?

ACTIVE

System OK

Go to Step 7

7
  1. Disconnect the RH door key switch connector.
  2. With a scan tool, observe the Door Key Switch parameter.
  3. Connect a 3-amp fused jumper wire between the signal circuit of the door key switch and ground.

Does the scan tool display ACTIVE?

ACTIVE

Go to Step 8

Go to Step 20

8
  1. Connect a 3-amp fused jumper wire between the signal circuit of the door key switch and the ground circuit at the RH door key switch connector.
  2. With the scan tool, observe the Door Key Switch parameter.

Does the scan tool display ACTIVE?

ACTIVE

Go to Step 19

Go to Step 21

9
  1. Disconnect the LH door key switch connector.
  2. With a scan tool, observe the Door Key Switch parameter.
  3. Connect a 3-amp fused jumper wire between the signal circuit of the door key switch and ground.

Does the scan tool display the specified ACTIVE?

ACTIVE

Go to Step 10

Go to Step 15

10
  1. Connect a 3-amp fused jumper wire between the signal circuit of the door key switch and the ground circuit at the LH door key switch connector.
  2. With the scan tool, observe the Door Key Switch parameter.

Does the scan tool display ACTIVE?

ACTIVE

Go to Step 17

Go to Step 16

11
  1. With a scan tool observe the Door Key Switch parameter.
  2. Disconnect the BCM connector containing the circuits to the door key switch.

Does the scan tool display INACTIVE?

INACTIVE

Go to Step 12

Go to Step 22

12
  1. Reconnect the BCM connector.
  2. Disconnect the LH door key switch connector.
  3. With a scan tool observe the Door Key Switch parameter.

Does the scan tool display INACTIVE?

INACTIVE

Go to Step 17

Go to Step 13

13
  1. Disconnect the RH door key switch connector.
  2. With a scan tool observe the Door Key Switch parameter.

Does the scan tool display INACTIVE?

INACTIVE

Go to Step 19

Go to Step 14

14

Repair the short to ground in the signal circuit of the door key switch between the BCM and either door latch.

Did you complete the repair?

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Go to Step 23

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15

Repair the open in the signal circuit of the door key switch between the LH door latch and C200.

Did you complete the repair?

--

Go to Step 23

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16

Repair the open in the ground circuit of the door key switch between the LH door key switch connector and G203.

Did you complete the repair?

--

Go to Step 23

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17

Replace the LH door latch. Refer to Front Side Door Lock Actuator Replacement in Doors.

Did you complete the replacement?

--

Go to Step 23

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18

Repair the open in the signal circuit of the door key switch between the BCM and C200.

Did you complete the repair?

--

Go to Step 23

Go to Step 22

19

Replace the RH door latch. Refer to Front Side Door Lock Actuator Replacement in Doors.

Did you complete the replacement?

--

Go to Step 23

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20

Repair the open in the signal circuit of the door key switch between the RH door key switch connector and C200.

Did you complete the repair?

--

Go to Step 23

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21

Repair the open in the ground circuit between the door key switch connector and G200.

Did you complete the repair?

--

Go to Step 23

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22

Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 23

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23
  1. Reconnect any connectors that were removed for testing.
  2. Clear any DTCs that may have been set during this procedure.
  3. Attempt to set the CTD system. Refer to Content Theft Deterrent (CTD) Description and Operation .

Does the system work as described?

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System OK

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information