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Rear Air Springs Do Not Inflate

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Rear Air Springs Do Not Inflate

Step Action Yes No
Schematic Reference: Suspension Controls Schematics 
1 Did you perform the Air Suspension Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Air Suspension 
2 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 
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 
4 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 
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 
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 
7 Repair the open in the Air Suspension Compressor Assembly ground circuit.
Did you complete the repair?		 Go to Step 9  -
8 Replace the Air Suspension Compressor Assembly.
Refer to Air Spring Compressor Replacement  .
Did you complete the replacement?		 Go to Step 9  -
9 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 3 
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