GM Service Manual Online
For 1990-2009 cars only

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 INJECTOR Fuse 7 from the RH I/P Power Distribution Center to prevent the engine from starting.
  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 AIRBAG/VATS Fuse 2E from the I/P Fuse Block.
  2. Connect a test lamp between the AIRBAG/VATS Fuse 2E terminal B1, 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 4T60-E Transaxle On-Vehicle Service or 4T65-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 AIRBAG/VATS Fuse 2E in the I/P Fuse Block for an open.

Is the AIRBAG/VATS Fuse 2E 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 AIRBAG/VATS Fuse 2E 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 S217 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 1342 (RED).

Does the test lamp light?

--

Go to Step 25

Go to Step 27

25

Check for an open in CKT 5 (YEL) between S217 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 & Dimmer Switch Assembly in Tilt Strg Col Unit Repair (SIR).

Is the ignition switch replacement complete?

--

Go to Starter and Charging System Check

--

27

Check the IGN SW Fuse in the RH MaxiFuse® Block for an open.

Is the IGN SW Fuse OK?

--

Go to Step 29

Go to Step 28

28

  1. Repair the short to ground in CKT 1342 (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 1342 (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 S217 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 Starter Enable (Theft Deterrent) 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

--