GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

Schematic Reference: Theft Deterrent System Schematics

Connector End View Reference: Theft Deterrent System Connector End Views

Important: Before attempting to diagnose the theft deterrent alarm, ensure that the ASM Part A and ASM Part B are enabled in the Dash Integration Module (DIM) Set Options menu.

DEFINITION: The theft deterrent alarm does not sound when the content theft deterrent (CTD) system is in alarm mode, or the theft deterrent alarm sounds when the CTD system is not in alarm mode.

1

Did you perform the Diagnostic System Check - Vehicle?

--

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Were you sent here from Content Theft Deterrent (CTD) Alarm Mode Inoperative?

--

Go to Step 3

Go to Content Theft Deterrent (CTD) Alarm Mode Inoperative

3

Does the theft deterrent alarm sound when the CTD system is not in alarm mode?

--

Go to Step 4

Go to Step 5

4

Does the theft deterrent alarm sound when the ignition is ON?

--

Go to Step 6

Go to Step 7

5

Disconnect the theft deterrent alarm harness connector.

Does the theft deterrent alarm sound?

--

Go to Step 8

Go to Step 9

6

  1. Turn the ignition ON.
  2. Probe the Ignition 1 voltage circuit at the theft deterrent alarm harness connector with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

--

Go to Step 9

Go to Step 13

7

Measure the voltage of the hazard switch signal circuit at the theft deterrent alarm harness connector.

Is the voltage near the specified value?

12 V

Go to Step 9

Go to Step 11

8

Test the theft deterrent alarm hazard switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 12

9

Test the theft deterrent alarm ground circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 10

10

Test the theft deterrent alarm battery positive voltage circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 14

11

Test the theft deterrent alarm hazard switch signal circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 15

12

Repair the short to voltage on the theft deterrent alarm ignition 1 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

--

13

Repair the short to ground or the open in the theft deterrent alarm ignition 1 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

--

14

Inspect for a loose or poor connection at the harness connector of the theft deterrent alarm. 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 18

Go to Step 16

15

Inspect for a loose or poor connection 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 18

Go to Step 17

16

Replace the theft deterrent alarm. Refer to Theft Deterrent Alarm Replacement .

Did you complete the repair?

--

Go to Step 18

--

17

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 18

--

18

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3