GM Service Manual Online
For 1990-2009 cars only

Theft Deterrent System Inoperative

Step

Action

Yes

No

1

Did you review the Theft Deterrent System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Theft Deterrent

2

Test cavity 10 of the Theft Deterrent Control Module for battery positive voltage. Refer to Circuit Testing in Wiring Systems.

Is voltage present?

Go to Step 3

Go to Step 4

3

Test cavity 29 of the Theft Deterrent Control Module for continuity to ground. Refer to Circuit Testing in Wiring Systems.

Is ground present?

Go to Step 6

Go to Step 5

4

Repair open or high resistance in the Theft Deterrent Module supply voltage circuit between cavity 10 of the Theft Deterrent Module and the 10A ECU-IG fuse. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 7

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5

Repair open or high resistance in the Theft Deterrent Module ground circuit between cavity 29 of the Theft Deterrent Module and G201. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 7

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6

Replace the Theft Deterrent Module. Refer to Theft Deterrent Module Replacement .

Did you complete the repair?

Go to Step 7

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7

Operate the system in order to verify the repair?

Did you complete the repair?

System OK

Go to Step 3