GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Automatic Level Control Schematics

1

Did you perform the Automatic Level Control Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Automatic Level Control

2

Verify the fault is present.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Test the reset signal circuit of the accessory inflator switch for the following:

    • open
    • short to ground
    • short to voltage
    • high resistance

Refer to Circuit Testing Testing for Short to Ground Testing for a Short to Voltage Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

Go to Step 7

Go to Step 4

4

Test the ground circuit of the accessory inflator switch for the following:

    • open
    • short to ground
    • short to voltage
    • high resistance

Refer to Circuit Testing , Testing for Short to Ground , Testing for a Short to Voltage , Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

Go to Step 7

Go to Step 5

5

Inspect for poor connections at the harness connector of the accessory inflator switch.

Did you find and correct the condition?

Go to Step 7

Go to Step 6

6

Replace the accessory inflator switch

Refer to Automatic Level Control Inflator Air Switch Replacement

Did you complete the replacement?

Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

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