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	Harness or connector (power source of suspension control ECU)	Click here
Suspension control ECU does not operate	Suspension control ECU	Click here
Air suspension system DTC cannot be output (when using intelligent tester)	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Harness or connector (power source of suspension control ECU)	Click here
	Suspension control ECU	Click here
Air suspension system DTC cannot be output (when not using intelligent tester)	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Harness or connector (power source of suspension control ECU)	Click here
	Suspension control ECU	Click here
	Combination meter assembly	Click here
Height control indicator does not come on	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Combination meter assembly	Click here
	Harness or connector (power source of suspension control ECU)	Click here
	Suspension control ECU	Click here
Height control indicator does not change even though vehicle height modes are switched using height control switch	Check test mode DTC (height control switch signal check)	Click here
	Suspension control relay (AIR SUS relay)	-
	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	Click here
Height control cannot be disabled using height control OFF switch	Check test mode DTC (height control OFF switch signal check)	Click here
	Suspension control ECU	Click here
Vehicle is not level	Air leakage	Click here
	Adjust height control sensor link	Click here
	Height control sensor	Click here
	Suspension control ECU	Click here
Warning message is shown on multi-information display even though DTC is not output	Connect of the connector	-
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Harness or connector (power source of suspension control ECU)	Click here
	Combination meter assembly	Click here
	Suspension control ECU	Click here