Did you review the Air Suspension Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Air Suspension Description and Operation

With the suspension loaded on the ground or drive-on hoist, perform a visual inspection checking for the following disconnected or damaged components:

Did you find and correct the condition?

Go to Step 15

Go to Step 3

1. Position the vehicle on the ground or on a drive-on hoist in order to load the suspension.
2. Remove the wheelhouse panel, deflated air spring side. Refer to Rear Outer Wheelhouse Replacement - Back .
3. Using soapy water, look for air bubbles in the following locations:

•	The top of the air spring collar to air line area

•	The compressor to air line connection

•	The air lines

•	Inflator air lines

4. Repair as necessary.

Did you find and correct the condition?

Go to Step 15

Go to Step 4

Important: Each air line has a bubble 18-22 mm (0.7-0.8 in) from the end if the line, acts as a stop. With the air line fully seated, the bubble will set next to the ferrule.

Inspect the air lines at the ECAS compressor ferrule nuts for proper installation.

Did you find and correct the condition?

Go to Step 6

Go to Step 5

1. Loosen the ferrule nut and push the line in until the line stops or the bubble is within 2 mm (0.08 in) from the ferrule nut.

Important: Do not over tighten the ferrule nut.

2. Tighten the ferrule nut to 2.5 N·m (22 lb in).

Did you find and correct the condition?

Go to Step 15

Go to Step 6

Inspect the ECAS air lines for any kinked, pinched, or damaged air line from the compressor to the air springs.

Did you find and correct the condition?

Go to Step 12

Go to Step 7

Important: Each air line has a bubble 18-22 mm (0.7- 0.8 in) from the end of the line acts as a stop. The bubble should be seated against the collet on the top of the air spring.

1. Inspect the air lines at the air springs for proper installation.
2. Push in and pull outward on the air line.

Did the air line remain seated in the air spring?

Go to Step 8

Go to Step 11

1. Disconnect the air lines from the air springs.
2. Inspect for very fine scratches in the line to collet mating surfaces.

Are scratches on the mating surfaces?

Go to Step 14

Go to Step 9

Reinstall the air lines to the air springs. Inspect the ferrule nut threads on the compressor.

Are the threads stripped or cross threaded?

Go to Step 13

Go to Step 10

Check the compressor output pressure using the following steps:

Important: The ECAS fuse is a 30 AMP fuse.

1. Install the ECAS fuse into the underhood electrical center.
2. Open the rear hatch and locate the accessory inflator outlet in the right rear quarter panel.
3. Turn ON the ignition, engine OFF.
4. Install the accessory inflator tool assembly provided with the vehicle.
5. Turn the accessory inflator switch to the ON position.

Does the compressor output measure 138-724 kPa (20-105 psi)?

System OK

Go to Rear Air Springs Do Not Deflate

Replace the air spring. Refer to Air Spring Replacement .

Did you complete the repair?

Go to Step 15

--

Replace the air suspension air line. Refer to Air Spring Replacement .

Did you complete the repair?

Go to Step 15

--

Replace the air spring compressor. Refer to Automatic Level Control Air Compressor Replacement .

Did you complete the repair?

Go to Step 15

--

Replace the air spring and air line. Refer to Air Spring Replacement .

Did you complete the repair?

Go to Step 15

--

1. Turn ON the ignition, engine OFF.
2. Allow the vehicle to rise until the compressor shuts OFF and curb height is achieved.
3. Operate the system in order to verify the repair.

Did you correct the condition?

--

Go to Step 2