GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Opel 🢒 1999 🢒 Sintra 🢒 Suspension 🢒 Automatic Level Control 🢒 Automatic Level Control Compressor Motor Does Not Activate

Step

Action

Value(s)

Yes

No

1

Did you perform the ALC System Check?

--

Go to Step 2

Go to Automatic Level Control System Operation Check

2

Check the ELC Fuse.

Is the ELC Fuse open?

--

Go to Step 3

Go to Step 4

3

Repair the short to ground in circuit 1240.

Has the repair been made and the system rechecked?

--

System OK

--

4

Check the MALL/RADIO/DIC Fuse.

Is the MALL/RADIO/DIC Fuse open?

--

Go to Step 5

Go to Step 6

5

Repair the short to ground in circuit 43.

Has the repair been made and the system rechecked?

--

System OK

--

6
  1. Disconnect the auto level control air compressor connector.
  2. Using a J 39200 , measure the voltage between the auto level control air compressor connector terminals C and E to ground.

Is the voltage within the specified range?

9 - 14 V

Go to Step 7

Go to Step 8

7
  1. Turn the ignition switch to the ON position.
  2. Using a J 39200 , measure the voltage between the auto level control air compressor connector terminal A and ground.

Is the voltage within the specified range?

9 - 14 V

Go to Step 9

Go to Step 10

8

Repair the poor connection or open in circuit 1240, between the auto level control air compressor connector terminals C and/or E and S445.

Has the repair been made and the system rechecked?

--

System OK

--

9

With the ignition switch still in the ON position, measure the voltage between the auto level control air compressor connector terminals A and G.

Is the voltage within the specified range?

9 - 14 V

Go to Step 11

Go to Step 12

10

Repair the poor connection or open in circuit 1725, between the auto level control auto compressor connector terminal G and G401.

Has the repair been made and the system rechecked?

--

System OK

--

11
  1. Set the ignition switch to the OFF position.
  2. Disconnect the auto level control air inflator relay connector.
  3. Using a J 39200 , measure the voltage between the auto level control air inflator relay connector terminal D and ground.

Is the voltage within the specified range?

9 - 14 V

Go to Step 13

Go to Step 14

12

Repair the poor connection or open in circuit 43, between the auto level control air compressor connector terminal A and S465.

Has the repair been made and the system rechecked?

--

System OK

--

13

Using a J 39200 , measure the voltage between the auto level control air inflator relay connector terminals D and H.

Is the voltage within specified range?

9 - 14 V

Go to Step 15

Go to Step 16

14

Repair the poor connection or open in circuit 1240, between the auto level control air inflator relay connector terminal D and S445.

Has the repair been made and the system rechecked?

--

System OK

--

15
  1. Disconnect the auto level control sensor connector.
  2. Connect a 10 A fused jumper wire between the auto level control air compressor connector terminals E and D.
  3. Using a J 39200 , measure the voltage at the auto level control air inflator relay connector terminal E and at the auto level control sensor connector terminal B.

Is the voltage within the specified range?

9 - 14 V

Go to Step 17

Go to Step 18

16

Repair the poor connection or open in circuit 321, between the auto level control air inflator relay connector terminal E, the auto level control sensor connector terminal B, and the auto level control air compressor connector terminal D.

Has the repair been made and the system rechecked?

--

System OK

--

17
  1. Remove the jumper wire from the auto level control air compressor connector terminals E and D and install it between the auto level control air inflator relay connector terminals D and B.
  2. Using a J 39200 , measure the voltage between the auto level control sensor connector terminal C and ground.

Is the voltage within the specified range?

9 - 14 V

Go to Step 19

Go to Step 20

18

Repair the poor connection or open in circuit 321, between the auto level control air inflator relay connector terminal E, the auto level control sensor connector terminal B, and the auto level control air compressor connector terminal D.

Has the repair been made and the system rechecked?

--

System OK

--

19
  1. Reconnect the auto level control air compressor, the auto level control air inflator relay, and the auto level control sensor connectors.
  2. Disconnect the air inflator switch connector.
  3. Turn the ignition switch to the ON position.
  4. Using a J 39200 , measure the voltage between the air inflator switch connector terminal A and ground.

Is the voltage within the specified range?

9 - 14 V

Go to Step 21

Go to Step 22

20

Repair the poor connection or open in circuit 1248, between the auto level control air inflator relay connector terminal B the auto level control sensor connector terminal C.

Has the repair been made and the system rechecked?

--

System OK

--

21
  1. Turn the ignition switch to the OFF position.
  2. Connect a 10 A fused jumper wire between the air inflator switch connector terminals A and B.
  3. Turn the ignition switch to the ON position.

Is the auto level control air compressor on?

--

Go to Step 23

Go to Step 24

22
  1. Repair the poor connection or open in circuit 1245, between the air inflator switch terminal A and the auto level control air inflator relay connector terminal F.
  2. If circuit 1245 is OK, replace the auto level control air inflator relay. Refer to Automatic Level Control Relay Replacement for long wheel base with HVAC, or Automatic Level Control Relay Replacement for long wheel base without HVAC, or Automatic Level Control Relay Replacement for short wheel base in Automatic Level Control.

Has the repair been made and the system rechecked?

--

System OK

--

23
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the auto level control air compressor relay.
  3. Connect a 10 A fused jumper wire between terminals 1 and 4 of the air compressor relay connector.
  4. Turn the ignition switch to the ON position.

Is the auto level control air compressor on?

--

Go to Step 25

Go to Step 26

24
  1. Repair the poor connection or open in circuit 1725, between the air inflator switch terminal B and S441.
  2. If OK, replace the air inflator switch. Refer to Automatic Level Control Inflator Air Switch Replacement for long wheel base with HVAC, or Automatic Level Control Inflator Air Switch Replacement for long wheel base without HVAC, or Automatic Level Control Inflator Air Switch Replacement for short wheel base in Automatic Level Control.

Has the repair been made and the system rechecked?

--

System OK

--

25

Replace the auto level control air compressor relay. Refer to Air Compressor Relay Replacement in Automatic Level Control.

Has the repair been made and the system rechecked?

--

System OK

--

26

Replace the auto level control air compressor. Refer to Air Compressor Replacement in Automatic Level Control.

Has the repair been made and the system rechecked?

--

System OK

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