Suspension Control - Automatic Level Control (Alc)

CIRCUIT DESCRIPTION
The exhaust accumulator will detect conditions of excessive exhaust solenoid valve activity. Usually this condition is generally due to the presence of pneumatic line blockages or unloaded vehicle conditions.

CONDITIONS FOR SETTING THE DTC
If the exhaust valve is active for more than 5 minutes and the rear of the vehicle remains above a trim position.

ACTION TAKEN WHEN THE DTC SETS
^ All exhaust function activity is disabled.
^ The LEVELING indicator lamp flashes.

CONDITIONS FOR CLEARING THE DTC
^ The DTC will clear when no error is detected and the cause for the error has been repaired.
^ Using a scan tool.

DIAGNOSTIC AIDS
^ Refer to the diagnostic table.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. Checks the automatic level control sensor lick-rod for defects.
3. Checks air compressor intake filter function.
4. Checks tubing for blockages.