Circuit Description
The Automatic Level Control compressor accumulator will detect excessive air compressor activity. This condition is generally due to the presence of pneumatic leaks or vehicle overload conditions. The accumulator timer will keep track of the accumulated run time of the compressor. The timer resets at each ignition cycle or after an exhaust sequence has occurred.
Conditions for Running the DTC
The ignition is on.
Conditions for Setting the DTC
The Automatic Level Control compressor is active for more than 3 minutes before the rear of the vehicle reaches a trim position..
Action Taken When the DTC Sets
The LEVELING indicator lamp will flash while this DTC is present. The function of the ALC system will be disabled.
Conditions for Clearing the DTC
The DTC will become a history DTC when conditions for the fault are no longer present and the ignition cycles from OFF to ON.
Diagnostic Aids
| • | Inspect for the addition of any aftermarket components. |
| • | Inspect all wiring carefully for chaffing and proper routing. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
Step | Action | No | |
|---|---|---|---|
Schematic Reference: Automatic Level Control Schematics | |||
1 | Did you perform the Automatic Level Control Diagnostic System Check? | Go to Step 2 | Go to |
Is any other DTC's present? | Go to | Go to | |
