For 1990-2009 cars

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 | Attempt to start the engine. Does the engine crank? | -- | Go to Step 5 | Go to Step 3
3 | Test the following PASS-Key®II module connector terminals for proper connections. Refer to Intermittents and Poor Connections Diagnosis in Wiring System:

• | Terminal A1

• | Terminal A2

• | Terminal B2

• | Terminal B5

• | Terminal B6

Are the contacts OK?

--

Go to Step 4

Go to Step 15

4 |

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?

--

Go to Step 10

Go to Step 14

5 |

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

6 | Observe one of the following indicators:

• | Instrument cluster (Buick)

• | Remote indicator bank (Oldsmobile)

Do the indicators light?

--

Go to Step 11

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

7 | Connect a fused jumper between the PASS-Key®II module harness connector terminal A5 and ground. Does the security indicator light? | -- | Go to Step 9 | Go to Step 8
8 | Repair the short to battery voltage in CKT 264. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Vehicle Theft Deterrent (VTD) System Check | --
9 | 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? | -- | Go to Step 10 | --
10 | Replace the PASS-Key®II module. Refer to Theft Deterrent Module Replacement . Is the repair complete? | -- | Go to Vehicle Theft Deterrent (VTD) System Check | --
11 | Inspect the instrument panel fuse. Is the fuse OK? | -- | Go to Step 12 | --
12 |

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

Are the circuits OK?

--

Go to Step 13

Go to Step 14

13 |

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?

--

Go to Vehicle Theft Deterrent (VTD) System Check

--

14 | Repair the faulty wiring. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Vehicle Theft Deterrent (VTD) System Check | --
15 | Repair the terminal contact. Refer to Repairing Connector Terminals in Wiring Systems. Is the repair complete? | -- | Go to Vehicle Theft Deterrent (VTD) System Check | --