GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Aurora 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 SECURITY Indicator On, Engine Does Not Crank

Step

Action

Value(s)

Yes

No

1

Did you perform the Vehicle Theft Deterrent (VTD) System Check?

--

Go to Step 2

Go to Vehicle Theft Deterrent (VTD) System Check

2
  1. Turn the

    2. ignition switch to OFF.

  2. Disconnect the theft deterrent relay.
  3. Connect a fused jumper between the theft deterrent relay harness connector terminal C1 and terminal A2.
  4. Attempt to start the vehicle.

Does the vehicle start?

--

Go to Step 4

Go to Step 3

3

Does the engine crank?

--

Go to Step 6

Go to Step 5

4

Measure the voltage between the theft deterrent relay harness connector C2 CKT 806 and ground while trying to start the engine.

Does the voltage measure within the specified range?

10-15 V

Go to Step 11

Go to Step 9

5
  1. Disconnect the PCM connector C1 (BLU).
  2. Measure the resistance between terminal C2 and ground.

Does the resistance measure within the specified range?

0-5 ohms

Go to Step 8

Go to Starting System Check in Engine Electrical

6

Inspect the following theft deterrent module terminals for proper connections:

  1. Terminal A1
  2. Terminal A2
  3. Terminal B2
  4. Terminal B5
  5. Terminal B6

Are the terminal connections OK?

--

Go to Step 7

Go to Step 17

7

Test the following power and ground circuits to the theft deterrent module for an open or short to ground:

  1. CKT 439
  2. CKT 1020
  3. CKT 1642

Are the circuits OK?

--

Go to Step 15

Go to Step 14

8
  1. Repair the short to ground in CKT 1433. Refer to Wiring Repairs in Wiring Systems.
  2. Reconnect the PCM connector C1.

Is the procedure complete?

--

Go to Vehicle Theft Deterrent (VTD) System Check

--

9

Inspect the IP fuse block crank fuse

Is the fuse OK?

--

Go to Step 10

Go to Step 18

10

Test CKT 806 for an open.

Is the wiring OK?

--

Go to Vehicle Theft Deterrent (VTD) System Check

Go to Step 14

11

While trying to start the engine, measure the voltage between the theft deterrent relay harness connector terminal C2 and terminal A1.

Does the voltage measure within the specified range?

10-15 V

Go to Step 16

Go to Step 12

12
    • Inspect the PARK/NEUTRAL position switch for proper operation and terminal contact.
    • Inspect the theft deterrent module terminal A4 for proper connections.

Is the terminal contact OK?

--

Go to Step 13

Go to Step 17

13

Test the for an open:

  1. CKT 625
  2. CKT 575

Are the circuits OK?

--

Go to Step 15

Go to Step 14

14

Repair the faulty circuit.

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Vehicle Theft Deterrent (VTD) System Check

--

15

Replace the theft deterrent module.

Refer to Theft Deterrent Module Replacement .

Is the repair complete?

--

Go to Vehicle Theft Deterrent (VTD) System Check

--

16

Replace the theft deterrent relay.

Refer to Theft Deterrent Relay Replacement .

Is the repair complete?

--

Go to Vehicle Theft Deterrent (VTD) System Check

--

17

Repair the terminal contact. Refer to Repairing Connector Terminals in Wiring Systems.

Is the repair complete?

--

Go to Vehicle Theft Deterrent (VTD) System Check

--

18

Repair the short to ground in CKT 806. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Vehicle Theft Deterrent (VTD) System Check

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