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

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Go to Step 2

Go to Vehicle Theft Deterrent (VTD) System Check

Attempt to start the engine.

Does the engine crank?

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Go to Step 5

Go to Step 3

Test the following PASS-Key®II module connector terminals for proper connections. Refer to Intermittents and Poor Connections Diagnosis in Wiring System:

Are the contacts OK?

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Go to Step 4

Go to Step 15

1. Test the following power and ground circuits to the PASS-Key®II module for an open:

•	CKT 439 (Oldsmobile)

•	CKT 1020 (Buick)

•

CKT 851

•

CKT 1642

2. Test the following power circuits for a short to ground:

•	CKT 439 (Oldsmobile)

•	CKT 1020 (Buick)

•

CKT 1642

Are the circuits OK?

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Go to Step 10

Go to Step 14

1. Turn the ignition switch to OFF.
2. Disconnect the PASS-Key®II module connector.
3. Turn the ignition switch to ON
4. Measure the voltage from the PASS-Key®II module connector terminal A5 to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 7

Go to Step 6

Observe one of the following indicators:

Do the indicators light?

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Go to Step 11

Go to Instrument Cluster System Check in Instrument Panel, Gauges and Console

Connect a fused jumper between the PASS-Key®II module harness connector terminal A5 and ground.

Does the security indicator light?

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Go to Step 9

Go to Step 8

Repair the short to battery voltage in CKT 264. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Vehicle Theft Deterrent (VTD) System Check

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Inspect the PASS-Key®II module connector terminal A5 for proper connection. Refer to Intermittents and Poor Connections Diagnosis in Wiring System.

Is the contact OK?

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Go to Step 10

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Replace the PASS-Key®II module. Refer to Theft Deterrent Module Replacement .

Is the repair complete?

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Go to Vehicle Theft Deterrent (VTD) System Check

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Inspect the instrument panel fuse.

Is the fuse OK?

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Go to Step 12

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1. Test CKT 40 for a short to ground.
2. Inspect CKT 264 and CKT 40 for an open.

Are the circuits OK?

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Go to Step 13

Go to Step 14

1. Inspect the indicator bulb.
2. Inspect the appropriate connectors for proper connection. Refer to Intermittents and Poor Connections Diagnosis in Wiring System:

•	The instrument cluster (Buick)

•	The remote indicator bank (Oldsmobile)

Are the connectors OK?

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Go to Vehicle Theft Deterrent (VTD) System Check

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Repair the faulty wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Vehicle Theft Deterrent (VTD) System Check

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

Is the repair complete?

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Go to Vehicle Theft Deterrent (VTD) System Check

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