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.
Problem symptoms may occur if the electric power control system's functions malfunction. Follow the HOW TO PROCEED WITH TROUBLESHOOTING procedures.

Air suspension system

AIR SUSPENSION SPECIFICATION

Symptom	Suspected Area	See
Drivability problem	Air leakage	OPERATION CHECK
	Front pneumatic cylinder	INSPECTION
	Rear pneumatic cylinder	INSPECTION
	Check DTC	DTC CHECK / CLEAR
	Suspension control ECU	TERMINALS OF ECU
Height control function is normal, but vehicle height is uneven	Initialization	INITIALIZATION
	Height control sensor link	DTC C1711 FRONT HEIGHT CONTROL SENSOR RH CIRCUIT MALFUNCTION; DTC C1712 FRONT HEIGHT CONTROL SENSOR LH CIRCUIT MALFUNCTION; DTC C1713 REAR HEIGHT CONTROL SENSOR RH CIRCUIT MALFUNCTION; DTC C1714 REAR HEIGHT CONTROL SENSOR LH CIRCUIT MALFUNCTION
	Suspension control ECU	TERMINALS OF ECU
When engine switch is turned on (IG), "HEIGHT HIGH" indicator light does not illuminate for approximately 2 seconds	Electric power control system	HOW TO PROCEED WITH TROUBLESHOOTING
	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	Electric power control system	HOW TO PROCEED WITH TROUBLESHOOTING
	Indicator CIRCUIT	INDICATOR CIRCUIT
When HEIGHT CONTROL SWITCH AND ABSORBER CONTROL SWITCH ARE OPERATED, INDICATOR LIGHT ONLY CHANGES FOR ONE SWITCH	No. 1 console switch	ECU POWER SOURCE CIRCUIT
	Combination meter	HOW TO PROCEED WITH TROUBLESHOOTING
DTC check cannot be done	CAN communication line	CAN COMMUNICATION SYSTEM
	Tc and CG terminal circuit	TC AND CG TERMINAL CIRCUIT
	Suspension control ECU	TERMINALS OF ECU
Input signal check (test mode) can not be done	CAN communication line	CAN COMMUNICATION SYSTEM
	Ts and CG terminal circuit	TS AND CG TERMINAL CIRCUIT
	Suspension control ECU	TERMINALS OF ECU