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. Turn OFF the ignition.
2. Disconnect the Air Suspension Compressor Assembly.
3. Turn ON the ignition, with the engine OFF.
4. Connect a test lamp between the ground circuit of the Air Suspension Compressor Assembly and a battery positive voltage circuit.

Does the test lamp illuminate?

Go to Step 4

Go to Step 7

Test the battery positive voltage circuit of the Air Suspension Compressor Assembly for an open, short to ground and high resistance. Refer to Circuit Testing , Testing for Short to Ground or Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 5

Test the ignition 3 voltage circuit of the Air Suspension Compressor Assembly for an open, short to ground and high resistance. Refer to Circuit Testing , Testing for Short to Ground or Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 6

Inspect for poor connections at the harness connector of the Air Suspension Compressor Assembly.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

Repair the open in the Air Suspension Compressor Assembly ground circuit.

Did you complete the repair?

Go to Step 9

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Replace the Air Suspension Compressor Assembly.

Refer to Air Spring Compressor Replacement .

Did you complete the replacement?

Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3