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?

--

Refer to PASS- Key®II Diagnostic System Check Cell 133 in Electrical Diagnosis

Go to Step 2

2 | Perform the battery load test. Refer to Battery Load Test . Did the battery check as 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 I/P 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 CKT 575 OK? | -- | Go to Step 31 | Go to Step 32
11 | Replace the battery. Refer to Battery . Is the battery replacement complete? | -- | Go to Starter and Charging System Check | --
12 | Repair the battery cable connections or replace battery cables as needed. Refer to Battery Cable . Is the battery cable repair complete? | -- | Go to Starter and Charging 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 starter replacement complete?

--

Go to Starter and Charging System Check

--

14 | Repair the open or short to ground in CKT 6 (PPL). Refer to Electrical Repairs Cell 5 in Electrical Diagnosis. Is the circuit repair complete? | -- | Go to Starter and Charging 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 park/neutral position (PNP) switch replacement complete? | -- | Go to Starter and Charging System Check | --
17 | Check for an open in CKT 625 (YEL/BLK). Is CKT 625 OK? | -- | Go to Step 18 | Go to Step 32
18 | Replace the Pass-Key® II Decoder Module. Refer to PASS-Key® II Module Replacement in Theft Deterrent Systems. Is the Pass-Key®II Decoder Module replacement complete? | -- | Go to Starter and Charging System Check | --
19 | Check the CRANK Fuse in the I/P Fuse Block for an open. Is the CRANK Fuse OK? | -- | Go to Step 21 | Go to Step 20
20 |

1. Repair the short to ground in CKT 806 (PPL). Refer to Electrical Repairs Cell 5 in Electrical Diagnosis.
2. Replace the CRANK Fuse in the I/P Fuse Block. Refer to Electrical Repairs Cell 5 in Electrical Diagnosis.

Is the circuit repair and fuse replacement complete?

--

Go to Starter and Charging System Check

--

21 | Repair the open in CKT 806 (PPL). Refer to Electrical Repairs Cell 5 in Electrical Diagnosis. Is the circuit repair complete? | -- | Go to Starter and Charging 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 I/P Fuse Block. Refer to Electrical Repairs Cell 5 in Electrical Diagnosis. Is the circuit repair complete? | -- | Go to Starter and Charging System Check | --
24 | Backprobe with a test lamp between the ignition switch 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 the ignition switch connector C202. Is the CKT 5 OK? | -- | Go to Step 26 | Go to Step 32
26 | Replace the ignition switch. Refer to Ignition & Key Alarm Switch Asm in Tilt Strg Col Unit Repair (SIR). Is the ignition switch replacement complete? | -- | Go to Starter and Charging System Check | --
27 | Check the IGN 3 Fuse in the RH Power Distribution Center MaxiFuse® Block #2 for an open. Is the IGN 3 Fuse OK? | -- | Go to Step 29 | Go to Step 28
28 |

1. Repair the short to ground in CKT 1442 (RED). Refer to Electrical Repairs Cell 5 in Electrical Diagnosis.
2. Replace the IGN SW Fuse in the RH MaxiFuse® Block. Refer to Electrical Repairs Cell 5 in Electrical Diagnosis.

Is the circuit repair and fuse replacement complete?

--

Go to Starter and Charging System Check

--

29 | Repair the open in CKT 1442 (RED). Refer to Electrical Repairs Cell 5 in Electrical Diagnosis. Is the circuit repair complete? | -- | Go to Starter and Charging System Check | --
30 | Repair the open in CKT 5 (YEL) between S223 and the starter enable relay. Refer to Electrical Repairs Cell 5 in Electrical Diagnosis. Is the circuit repair complete? | -- | Go to Starter and Charging System Check | --
31 | Replace the starter enable relay. Refer to Lamp Control Module (LCM)/MALL Module/ PASS-Key® II Relay in Instrument Panel, Gauges, and Console. Is the starter enable relay replacement complete? | -- | Go to Starter and Charging System Check | --
32 | Repair the suspect circuit. Refer to Electrical Repairs Cell 5 in Electrical Diagnosis. Is the circuit repair complete? | -- | Go to Starter and Charging System Check | --