GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.

1

Did you perform the theft deterrent diagnostic system check?

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Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

  1. Connect a scan tool to the data link connector (DLC).
  2. Record any DTCs present.
  3. Clear the DTCs.

Is DTC B1015 set?

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Go to Step 3

Go to Step 4

3

  1. Turn the ignition switch to the RUN position.
  2. Disconnect the PASSLOCK® lock cylinder connector.
  3. Measure the voltage between the connector terminal A and terminal B.

Is the voltage equal to the specified value?

B+

Go to Step 5

Go to Step 6

4

  1. Turn the ignition switch to the OFF position.
  2. Connect the scan tool to the DLC.
  3. Disconnect the PASSLOCK® lock cylinder connector.
  4. Turn the ignition switch to the START position.

Does DTC B1011 set?

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Go to Step 6

Go to Step 7

5

  1. Turn the ignition switch to the RUN position.
  2. Disconnect the PASSLOCK® lock cylinder connector.
  3. Measure the voltage between the connector terminal C and terminal B.

Does the voltage equal the specified value?

5 V

Go to Step 7

Go to Step 6

6

Check Circuits 1459/1835 for an open if OKreplace the instrument panel cluster. Refer to Instrument Cluster Replacement .

Did you complete the repair?

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Go to Diagnostic System Check - Theft Deterrent

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7

Replace the PASSLOCK® lock cylinder. Refer to Ignition Lock Cylinder Replacement - On Vehicle in Steering Wheel and Column.

Did you complete the repair?

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Go to Diagnostic System Check - Theft Deterrent

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