AIR SUSPENSION SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Air Suspension System
Symptom	Suspected Area	See page
Suspension control ECU does not operate	Auxiliary battery	Click here
	Charging system	Click here
	Harness or connector (power source of ECU)	Click here
	Suspension control ECU (for LHD)	Click here
	Suspension control ECU (for RHD)	Click here
DTC cannot be read	CAN communication system	Click here
	Auxiliary battery	Click here
	Charging system	Click here
	Harness or connector (power source of ECU)	Click here
	Suspension control ECU (for LHD)	Click here
	Suspension control ECU (for RHD)	Click here
Height control indicator light does not come on	CAN communication system	Click here
	Combination meter assembly	Click here
	Auxiliary battery	Click here
	Charging system	Click here
	Harness or connector (power source of ECU)	Click here
	Suspension control ECU (for LHD)	Click here
	Suspension control ECU (for RHD)	Click here
Height control indicator light does not change even though vehicle height modes are switched using the height control switch	Height control switch	Click here
	AIR SUS relay	Click here
	Compressor motor	Click here
	Harness or connector (power source of compressor motor)	Click here
	Continuous Electric Current to Height Control	Click here
	Suspension control ECU (for LHD)	Click here
	Suspension control ECU (for RHD)	Click here
Height control cannot be disabled using the height control OFF switch	Height control OFF switch	Click here
	Suspension control ECU (for LHD)	Click here
	Suspension control ECU (for RHD)	Click here
Vehicle is not level	Height control sensor	Click here
	Harness or connector (height control sensor - ECU)	Click here
	Vehicle height offset calibration error	Click here
	Suspension control ECU (for LHD)	Click here
	Suspension control ECU (for RHD)	Click here
A warning message is shown on the multi-information display even though a DTC is not stored	Connect of the connector	-
	CAN communication system	Click here
	Harness or connector (power source of ECU)	Click here
	Combination meter assembly	Click here
	Suspension control ECU (for LHD)	Click here
	Suspension control ECU (for RHD)	Click here