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 .

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 .

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 .

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 .

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