Diagnosis Procedure

SUSPENSION CONTROL SYSTEM DOES NOT LOWER


Diagnosis Procedure

1.SUSPENSION CONTROL UNIT POWER AND GROUND INSPECTION
Check the suspension control unit power and ground supply. Refer to Suspension Control Unit Suspension Air Compressor, "SUSPENSION CONTROL
UNIT : Diagnosis Procedure".
Does the suspension control unit power and ground pass inspection?
YES - GO TO 2.
NO - Repair or replace the malfunctioning part.
2.CHECK HEIGHT SENSOR SIGNAL INPUT
CONSULT-III DATA MONITOR
1. Turn ignition ON.
2. Select "HEIGT SEN" of AIR LEVELIZER data monitor item.
3. Check the monitor status.

HEIGT SEN : 0.2V - 4.8V

Is the height sensor voltage normal?
YES - GO TO 3.
NO - Check height sensor signal circuit. Refer to Diagnosis Procedure .
3.EXHAUST VALVE SOLENOID CIRCUIT INSPECTION
Check the exhaust valve solenoid circuit. Refer to Component Function Check.
Does the exhaust valve solenoid circuit pass inspection?
YES - Inspect for a restriction in the system. repair or replace the malfunctioning part.
NO - Repair or replace the malfunctioning part.