Schematic Reference: Suspension Controls Schematics

Did you perform the Air Suspension Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Air Suspension

Verify the fault is present.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Connect a scan tool.
2. Turn ON ignition, with engine OFF.
3. Use scan tool to activate inflator switch.

Does the compressor turn on?

Go to Step 4

Go to Step 8

Test the signal circuit of the air suspension inflator switch for an open, short to ground, short to voltage and 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 10

Go to Step 5

Test the low reference circuit of the air suspension inflator switch for an open, short to ground, short to voltage and 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 10

Go to Step 6

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

Did you find and correct the condition?

Go to Step 10

Go to Step 7

Replace air suspension inflator switch.

Refer to Inflator Air Switch Replacement .

Did you complete the replacement?

Go to Step 10

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Inspect for poor connections at the harness connector of the air suspension compressor assembly.

Did you find and correct the condition?

Go to Step 10

Go to Step 9

Replace air suspension module.

Refer to Air Spring Compressor Replacement .

Did you complete the replacement?

Go to Step 10

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3