GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Schematic Reference: Theft Deterrent System Schematics

Connector End View Reference: Theft Deterrent System Connector End Views

DEFINITION: Security Indicator inoperative during bulb check.

1

Did you perform the Theft Deterrent Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

  1. Turn OFF the ignition.
  2. Turn ON the ignition, with the engine OFF.
  3. Observe the Security indicator on the instrument cluster panel (IPC) during the bulb check.

Does the Security indicator illuminate during the bulb check?

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

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the theft deterrent control module connector located at the base of the steering column.
  3. Turn ON the ignition, with the engine OFF.
  4. Measure the voltage from the security indicator control circuit at the vehicle harness connector to a good ground. Refer to Circuit Testing in Wiring Systems.

Does the voltage measure near the specified value?

B+

Go to Step 4

Go to Step 5

4

Inspect for poor connections at the harness connector of the theft deterrent control module. 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 10

Go to Step 6

5

Test the security indicator control circuit of the theft deterrent control module for a short to voltage or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 10

Go to Step 7

6

Important: If a 10 Minute or 30 Minute Re-Learn Procedure is perform, all keys not learned at that time will be erased and will not be recognized. Perform the Adding Keys procedure on all keys or instruct the customer how to perform the Adding Keys procedure. Refer to Adding Keys .

  1. Replace the theft deterrent control module . Refer to Theft Deterrent Module Replacement .
  2. Perform the programming theft deterrent system components. Refer to Programming Theft Deterrent System Components .

Did you complete the replacement?

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Go to Step 10

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7

Inspect for poor connections at the harness connector of the IPC. 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 10

Go to Step 8

8

Replace the Security indicator bulb. Refer to Instrument Cluster Indicator Lamp Replacement in Instrument Panel, Gages, and Console.

Did the replacement bulb correct the condition?

--

Go to Step 10

Go to Step 9

9

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.

Did you complete the replacement?

--

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2