Problem Symptoms Table

HINT:

Use the table below to help determine the cause of the problem symptom. 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

Air suspension system

PROBLEM SYMPTOMS CHART

Symptom	Suspected Area	Refer To
Drivability problem	Air leakage	OPERATION CHECK
	Front pneumatic cylinder	INSPECTION
	Rear pneumatic cylinder	INSPECTION
	Check DTC	DTC CHECK / CLEAR
	Suspension control ECU	PROBLEM SYMPTOMS TABLE
Height control function is normal, but vehicle height is uneven	Initialization	INITIALIZATION
	Height control sensor link	SUSPENSION CONTROL SYSTEM
	Suspension control ECU	PROBLEM SYMPTOMS TABLE
"HEIGHT HIGH" indicator light does not illuminate during first 2 seconds after power switch is turned ON (IG)	ECU power source circuit	ECU POWER SOURCE CIRCUIT
	Indicator circuit	INDICATOR CIRCUIT
When height control switch and absorber control switch are operated, indicator light does not change	Indicator circuit	INDICATOR CIRCUIT
When height control switch and absorber control switch are operated, indicator light only changes for one switch	Combination switch	INDICATOR CIRCUIT
	Combination meter	HOW TO PROCEED WITH TROUBLESHOOTING
DTC check cannot be done	CAN communication line	CAN COMMUNICATION SYSTEM
DTC check cannot be done	Suspension control ECU	PROBLEM SYMPTOMS TABLE
Input signal check (test mode) cannot be done	CAN communication line	CAN COMMUNICATION SYSTEM
	TS and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
	Suspension control ECU	PROBLEM SYMPTOMS TABLE