Suspension Control System Inoperative
SUSPENSION CONTROL SYSTEM INOPERATIVEDescription
The suspension control system does not activate. It does not raise or lower the vehicle in response to ride height changes.
Diagnosis Procedure
1. SUSPENSION CONTROL UNIT POWER AND GROUND INSPECTION
Check the suspension control unit power and ground supply. Refer to SCS-17, "SUSPENSION CONTROL UNIT: "Diagnosis Procedure". 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 switch 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 SCS-22, "Diagnosis Procedure". Height Sensor Signal Circuit
3. CHECK GENERATOR "L" CIRCUIT SIGNAL
CONSULT-III DATA MONITOR
1. Start the engine.
2. Select "ACG L" of AIR LEVELIZER data monitor item.
3. Check the monitor status.
ACG L
: OFF with charge light OFF
: ON with charge light ON
Is the generator "L" signal operating normally?
YES >> GO TO 4.
NO >> Check generator L circuit. Refer to CHG-13, "Diagnosis Procedure".
4. SUSPENSION AIR COMPRESSOR POWER AND GROUND INSPECTION
Check the suspension air compressor power and ground supply. Refer to SCS-17, "SUSPENSION AIR COMPRESSOR: "Diagnosis Procedure". Suspension Air Compressor: Diagnosis Procedure
Does the suspension air compressor power and around pass inspection?
YES >> System is operating normally.
NO >> Repair or replace the malfunctioning part.