Suspension Control - Automatic Level Control (Alc)

CIRCUIT DESCRIPTION
The compress accumulator will detect conditions of excessive rear suspension leveling air compressor activity. Usually this condition is generally due to the presence of pneumatic leaks or vehicle overload conditions. An accumulator timer will keep track of the compressor run time. The timer resets at each ignition cycle or if an exhaust sequence has occurred.

CONDITIONS FOR SETTING THE DTC
If the compressor is active for more than 3 minutes before the rear of the vehicle reaches a trim position.

ACTION TAKEN WHEN THE DTC SETS
^ All compressor activity is disabled.
^ The LEVELING indicator lamp flashes.
^ DTC 10 is stored as a history code at the end of the ignition cycle.

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.
3. Checks condition of the rear suspension leveling air compressor relay K19.