For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Connect a 10 A fused jumper from the air inflator switch terminal A to terminal B.
2. Using a test light, backprobe the auto level control air inflator relay harness connector terminal C to ground.

Is the test light on?

--

Go to Step 2

Go to Step 3

2 |

1. Disconnect the auto level control air inflator solenoid valve.
2. Using a test light, backprobe the auto level control air inflator solenoid valve harness connector from terminal A to terminal B.

Is the test light on?

--

Go to Step 4

Go to Step 5

3 | Replace auto level control air inflator relay. Refer to:

• | Automatic Level Control Relay Replacement for long wheel base with HVAC

• | Automatic Level Control Relay Replacement for long wheel base without HVAC

• | Automatic Level Control Relay Replacement for short wheel base

Has the repair been made and the system rechecked?

--

System OK

--

4 | Replace the auto level control air inflator solenoid valve. Refer to Air Inflator Solenoid Valve Replacement. Has the repair been made and the system rechecked? | -- | System OK | --
5 | Check for a poor connection or open in circuit 1249. Is there a poor connection or open in circuit 1249? | -- | Go to Step 7 | Go to Step 6
6 | Repair the poor connection or open in circuit 1725 between the auto level control air inflator solenoid valve harness connector terminal B and S441 to G401. Has the repair been made and the system rechecked? | -- | System OK | --
7 | Repair the poor connection or open in circuit 1249. Has the repair been made and the system rechecked? | -- | System OK | --