GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 Catera 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Content Theft Deterrent (CTD) Does Not Disarm with Key Lock

Test Description

The numbers below refer to the step numbers on the diagnostic table.

Important: For Diagnostic Aids, refer to Testing for Intermittent Conditions and Poor Connections and Testing for Electrical Intermittents in Wiring Systems.

  1. Scan tool should read the normal state operation.

Step

Action

Yes

No

Schematic Reference: Theft Deterrent System Schematics

1

Did you perform the Theft Deterrent Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the key disarm input parameter in the Body Control module (BCM) Inputs data list.

Does the scan tool display OFF?

Go to Step 3

Go to Step 4

3
  1. Activate the drivers door lock switch by rotating the key cylinder from lock to unlock.
  2. With the scan tool, observe the key disarm input parameter.

Does the key disarm input parameter change state?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 6

4

  1. Turn OFF the ignition.
  2. Disconnect the driver door lock switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the key disarm input parameter.

Does the scan tool display OFF?

Go to Step 7

Go to Step 5

5

Test the drivers door lock switch input circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 11

6
  1. Using a 3 amp fused jumper wire, jumper the drivers door lock switch harness connector input circuit to the drivers door lock switch harness connector ground circuit.
  2. With a scan tool, observe the key disarm input parameter.

Does the scan tool display ON?

Go to Step 12

Go to Step 8

7

Inspect for poor connections at the harness connector of the drivers door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 14

8
  1. Using a 3 amp fused jumper wire, jumper the drivers door lock switch harness connector input circuit to a good ground.
  2. With a scan tool, observe the key disarm input parameter.

Does the scan tool display ON?

Go to Step 9

Go to Step 10

9

Test the drivers door lock switch ground circuit for a short to voltage or an open circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 11

10

Test the drivers door lock switch. input circuit for a short to voltage or an open circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 11

11

Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 13

12

Inspect for poor connections at the harness connector of the drivers door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 14

13

Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 15

--

14

Replace the drivers door lock switch. Refer to Theft Deterrent Door Lock Switch Replacement in Doors.

Did you complete the replacement?

Go to Step 15

--

15

Operate the system to verify the repair.

Did you correct the condition?

System OK

Go to Step 2