For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Place gear selector in the PARK position.
2. Turn the ignition switch to the START position.
3. Observe the SECURITY indicator.

Does the indicator stay on or flash continuously?

--

Go to PASS- Key®II Diagnostic System Check in Theft Deterrent

Go to Step 2

2 | Perform the battery load test. Refer to Battery Load Test . Is the battery OK? | -- | Go to Step 3 | Go to Step 11
3 | Check the battery cables and connections. Are the battery cables and connections OK? | -- | Go to Step 4 | Go to Step 12
4 |

1. Remove the appropriate injector fuse(s) from the I/P Fuse Block to prevent the engine from starting:

• | Buick: INJ Fuse.

• | Oldsmobile: INJ 1 fuse and INJ 2 fuse.

2. Turn the ignition switch to the START position.
3. Using a DMM, measure the voltage at the starter solenoid terminal S, CKT 6 (PPL) to ground.

Is the measured voltage greater than the specified value?

8 V

Go to Step 13

Go to Step 5

5 |

1. Disconnect CKT 6 (PPL) from the starter solenoid.
2. Turn the ignition switch to the START position.
3. Using a DMM, measure the voltage at the starter enable relay terminal A2, CKT 6 (PPL) to ground.

Is the measured voltage greater than the specified value?

8 V

Go to Step 14

Go to Step 6

6 |

1. Reconnect CKT 6 (PPL) to the starter solenoid.
2. Backprobe with a test lamp between battery positive voltage (B+) and the park/neutral position (PNP) switch connector C1 terminal G, CKT 575 (YEL).
3. Place the gear selector lever in the PARK position.

Does the test lamp light?

--

Go to Step 7

Go to Step 15

7 |

1. Connect a test lamp between the starter enable relay terminal C2, CKT 806 (PPL) and ground.
2. Place the ignition switch in the START position.

Does the test lamp light?

--

Go to Step 9

Go to Step 8

8 |

1. Remove the CRANK Fuse from the IP fuse block.
2. Connect a test lamp between the CRANK fuse terminal C14, CKT 5 (YEL) and ground.
3. Place the ignition switch in the START position.

Does the test lamp light?

--

Go to Step 19

Go to Step 22

9 |

1. Turn the ignition switch to the START position.
2. Using a DMM, measure the voltage at the starter enable relay terminal C1, CKT 5 (YEL) to ground.

Is the measured voltage greater than the specified value?

8 V

Go to Step 10

Go to Step 30

10 | Check for an open in CKT 575 (YEL). Is the circuit OK? | -- | Go to Step 31 | Go to Step 32
11 | Replace the battery. Refer to Battery Replacement . Is the replacement complete? | -- | Go to Starting System Check | --
12 | Repair the battery cable connections or replace battery cables as needed. Refer to Battery Cable . Is the repair complete? | -- | Go to Starting System Check | --
13 |

1. Check for poor connections at starter solenoid terminal S, CKT 6 (PPL).
2. Check for dirty or poor ground between starter and engine block. Refer to Starter Motor Inspection .
3. If OK, replace the starter. Refer to Starter Motor Replacement .

Is the replacement complete?

--

Go to Starting System Check

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14 | Repair the open or short to ground in CKT 6 (PPL). Is the circuit repair complete? | -- | Go to Starting System Check | --
15 | Backprobe with a test lamp between battery positive voltage (B+) and the PNP switch connector C1 terminal E, CKT 625 (YEL/BLK). Does the test lamp light? | -- | Go to Step 16 | Go to Step 17
16 | Replace the park/neutral position (PNP) switch. Refer to 4T65-E Transaxle On-Vehicle Service or 4T80-E Transaxle On-Vehicle Service. Is the replacement complete? | -- | Go to Starting System Check | --
17 | Check for an open in CKT 625 (YEL/BLK). Is the circuit OK? | -- | Go to Step 18 | Go to Step 32
18 | Replace the Pass-Key® II theft deterrent module. Refer to PASS-Key® II Module Replacement in Theft Deterrent Systems. Is the replacement complete? | -- | Go to Starting System Check | --
19 | Check the CRANK fuse in the IP fuse block for an open. Is the fuse OK? | -- | Go to Step 21 | Go to Step 20
20 |

1. Repair the short to ground in CKT 806 (PPL).
2. Replace the CRANK fuse in the IP fuse block.

Is the circuit repair and fuse replacement complete?

--

Go to Starting System Check

--

21 | Repair the open in CKT 806 (PPL). Is the circuit repair complete? | -- | Go to Starting System Check | --
22 |

1. Turn the ignition switch to the START position.
2. Using a DMM, measure the voltage at the starter enable relay terminal C1, CKT 5 (YEL) to ground.

Is the measured voltage greater than the specified value?

8 V

Go to Step 23

Go to Step 24

23 | Repair the open in CKT 5 (YEL) between S223 and the IP fuse block. Is the circuit repair complete? | -- | Go to Starting System Check | --
24 | Backprobe with a test lamp to ground, connector C202 terminal D5, CKT 1442 (RED). Does the test lamp light? | -- | Go to Step 25 | Go to Step 27
25 | Check for an open in CKT 5 (YEL) between S223 and connector C202. Is the circuit OK? | -- | Go to Step 26 | Go to Step 32
26 | Replace the ignition switch. Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle in Steering Wheel Column Tilt. Is the repair complete? | -- | Go to Starting System Check | --
27 | Check the IGN 3 Fuse in the RH rear junction block for an open. Is the fuse OK? | -- | Go to Step 29 | Go to Step 28
28 |

1. Repair the short to ground in CKT 1442 (RED).
2. Replace the IGN SW fuse in the RH rear junction block.

Is the circuit repair and fuse replacement complete?

--

Go to Starting System Check

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29 | Repair the open in CKT 1442 (RED). Is the circuit repair complete? | -- | Go to Starting System Check | --
30 | Repair the open in CKT 5 (YEL) between S223 and the starter enable relay. Is the circuit repair complete? | -- | Go to Starting System Check | --
31 | Replace the starter enable relay. Refer to Battery Cable in Engine Electrical. Is the repair complete? | -- | Go to Starting System Check | --
32 | Repair the suspect circuit. Is the circuit repair complete? | -- | Go to Starting System Check | --