GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Trans Sport (Export) 🢒 Suspension 🢒 Automatic Level Control 🢒 Residual Air Pressure Check

Residual Air Pressure Check Do Not Use

Step

Action

Value(s)

Yes

No

DEFINITION: The objective of this check is to identify and repair potential sources of problems with the air replenishment cycle.

1
  1. Unload the vehicle completely
  2. Turn the ignition switch to RUN and wait approximately 40 seconds.

Does the compressor run for more than 7 seconds?

--

Go to Step 2

Go to Step 3

2

Perform the electrical check in chart 6 in Electrical Diagnosis.

Is the repair complete?

--

System OK

Go to Step 8

3

Does the compressor run for less than 1½ second or not at all?

--

Go to Step 4

Go to Step 5

4

Perform the electrical check in chart 4 in Electrical Diagnosis.

Is the repair complete?

--

System OK

Go to Step 8

5

Do the shock air sleeves slightly inflate after a cycle? Do the air sleeves stay slightly inflated?

--

System OK

Go to Step 6

6

Perform the Air Path Check. Refer to Air Compressor Leak Test .

Is the repair complete?

--

System OK

Go to Step 7

7

Replace the dryer

Is the repair complete?

--

System OK

Go to Step 8

8
  1. Check for poor connections or damage at the automatic level control sensor.
  2. Check the automatic level control sensor adjustment. Refer to Air Compressor Leak Test .

Is the repair complete?

--

System OK

Go to Step 9

9
  1. Replace the automatic level control sensor.
  2. Perform the system operation check in order to verify the repair.

Is the repair complete?

--

System OK

--

Residual Air Pressure Check Do Not Use

Step

Action

Value(s)

Yes

No

DEFINITION: The objective of this check is to identify and repair potential sources of problems with the air replenishment cycle.

1
  1. Unload the vehicle completely.
  2. Turn the ignition switch to RUN and wait approximately 40 seconds.

Does the compressor run for more than 7 seconds?

--

Go to Step 2

Go to Step 3

2

Perform the electrical check in chart 6 in Electrical Diagnosis.

Is the repair complete?

--

System OK

Go to Step 8

3

Does the compressor run for less than 1½ second or not at all?

--

Go to Step 4

Go to Step 5

4

Perform the electrical check in chart 4 in Electrical Diagnosis.

Is the repair complete?

--

System OK

Go to Step 8

5

Do the shock air sleeves slightly inflate after a cycle? Do the air sleeves stay slightly inflated?

--

System OK

Go to Step 6

6

Perform the Air Path Check. Refer to Air Compressor Leak Test .

Is the repair complete?

--

System OK

Go to Step 7

7

Replace the dryer

Is the repair complete?

--

System OK

Go to Step 8

8
  1. Check for poor connections or damage at the automatic level control sensor.
  2. Check the automatic level control sensor adjustment. Refer to Air Compressor Leak Test .

Is the repair complete?

--

System OK

Go to Step 9

9
  1. Replace the automatic level control sensor.
  2. Perform the system operation check in order to verify the repair.

Is the repair complete?

--

System OK

--