Problem Symptoms Table

AIR SUSPENSION SYSTEM

Symptom	Suspected area	Information
Vehicle height control function does not operate	Freezing of the air tube	-
	Power source circuit	DTC C1774/74: POWER SOURCE CIRCUIT
	Crankshaft position sensor circuit	DTC C1779/79, C1797/97: CRANKSHAFT POSITION SENSOR CIRCUIT; CRANKSHAFT POSITION SENSOR CIRCUIT
	Height control OFF switch circuit	DTC C1788/88: HEIGHT CONTROL OFF SWITCH CIRCUIT
	Height control switch circuit	DTC C1786/86: HEIGHT CONTROL SWITCH CIRCUIT
	Height control sensor circuit	DTC C1711/11, C1712/12, C1713/13, C1714/14: FRONT HEIGHT CONTROL SENSOR RH CIRCUIT MALFUNCTION; FRONT HEIGHT CONTROL SENSOR LH CIRCUIT MALFUNCTION; RIGHT REAR HEIGHT CONTROL SENSOR CIRCUIT; LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT
	Height control solenoid valve circuit	DTC C1737/31, C1738/32, C1739/33, C1740/34: RIGHT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; RIGHT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT
	Exhaust solenoid valve circuit	DTC C1735/35: EXHAUST SOLENOID VALVE CIRCUIT
	AIR SUS relay circuit	DTC C1741/41: AIR SUSPENSION RELAY CIRCUIT
	Height control compressor circuit	DTC C1742/42: HEIGHT CONTROL COMPRESSOR CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Height control indicator light does not switch to the correct position in accordance to height control switch operation	Power source circuit	DTC C1774/74: POWER SOURCE CIRCUIT
	Crankshaft position sensor circuit	DTC C1779/79, C1797/97: CRANKSHAFT POSITION SENSOR CIRCUIT; CRANKSHAFT POSITION SENSOR CIRCUIT
	Height control OFF switch circuit	DTC C1788/88: HEIGHT CONTROL OFF SWITCH CIRCUIT
	Height control switch circuit	DTC C1786/86: HEIGHT CONTROL SWITCH CIRCUIT
	Height control sensor circuit	DTC C1711/11, C1712/12, C1713/13, C1714/14: FRONT HEIGHT CONTROL SENSOR RH CIRCUIT MALFUNCTION; FRONT HEIGHT CONTROL SENSOR LH CIRCUIT MALFUNCTION; RIGHT REAR HEIGHT CONTROL SENSOR CIRCUIT; LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT
	Height control solenoid valve circuit	DTC C1737/31, C1738/32, C1739/33, C1740/34: RIGHT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; RIGHT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT
	Exhaust solenoid valve circuit	DTC C1735/35: EXHAUST SOLENOID VALVE CIRCUIT
	AIR SUS relay circuit	DTC C1741/41: AIR SUSPENSION RELAY CIRCUIT
	Height control compressor circuit	DTC C1742/42: HEIGHT CONTROL COMPRESSOR CIRCUIT
	Speed sensor circuit	DTC C1776/76, C1784/84, C1785/85: SPEED SENSOR CIRCUIT; RIGHT REAR SPEED SENSOR CIRCUIT; LEFT REAR SPEED SENSOR CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Hunting of vehicle height occurs	Air leakage	-
	Height control sensor circuit	DTC C1711/11, C1712/12, C1713/13, C1714/14: FRONT HEIGHT CONTROL SENSOR RH CIRCUIT MALFUNCTION; FRONT HEIGHT CONTROL SENSOR LH CIRCUIT MALFUNCTION; RIGHT REAR HEIGHT CONTROL SENSOR CIRCUIT; LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Vehicle height control operates, but vehicle height is uneven	Air leakage	-
	Clogging of the Air tube	-
	Height control sensor link sub-assembly	SUSPENSION CONTROL SYSTEM
	Height control sensor circuit	DTC C1711/11, C1712/12, C1713/13, C1714/14: FRONT HEIGHT CONTROL SENSOR RH CIRCUIT MALFUNCTION; FRONT HEIGHT CONTROL SENSOR LH CIRCUIT MALFUNCTION; RIGHT REAR HEIGHT CONTROL SENSOR CIRCUIT; LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT
	Height control solenoid valve circuit	DTC C1737/31, C1738/32, C1739/33, C1740/34: RIGHT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; RIGHT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Vehicle height control operates, but vehicle height is high or low. (Vehicle height in NORMAL mode differs from the standard value)	Height control sensor link sub-assembly	SUSPENSION CONTROL SYSTEM
	Height control sensor circuit	DTC C1711/11, C1712/12, C1713/13, C1714/14: FRONT HEIGHT CONTROL SENSOR RH CIRCUIT MALFUNCTION; FRONT HEIGHT CONTROL SENSOR LH CIRCUIT MALFUNCTION; RIGHT REAR HEIGHT CONTROL SENSOR CIRCUIT; LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
When vehicle height control is adjusted, but it stops at extremely high or extremely low position	Height control sensor circuit	DTC C1711/11, C1712/12, C1713/13, C1714/14: FRONT HEIGHT CONTROL SENSOR RH CIRCUIT MALFUNCTION; FRONT HEIGHT CONTROL SENSOR LH CIRCUIT MALFUNCTION; RIGHT REAR HEIGHT CONTROL SENSOR CIRCUIT; LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT
	Height control sensor link sub-assembly	SUSPENSION CONTROL SYSTEM
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Height control OFF indicator light condition is abnormal	Power source circuit	DTC C1774/74: POWER SOURCE CIRCUIT
	Height control OFF switch circuit	DTC C1788/88: HEIGHT CONTROL OFF SWITCH CIRCUIT
	Height control OFF indicator light circuit	HEIGHT CONTROL OFF INDICATOR LIGHT CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Height control indicator light condition is abnormal	Power source circuit	DTC C1774/74: POWER SOURCE CIRCUIT
	Height control indicator light circuit	HEIGHT CONTROL INDICATOR LIGHT CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Access mode indicator light condition is abnormal	Power source circuit	DTC C1774/74: POWER SOURCE CIRCUIT
Access mode indicator light condition is abnormal	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
DTC check cannot be completed	Power source circuit	DTC C1774/74: POWER SOURCE CIRCUIT
	TC terminal circuit	TC AND CG TERMINAL CIRCUIT
	Height control OFF indicator light circuit	HEIGHT CONTROL OFF INDICATOR LIGHT CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Test mode cannot be completed	Power source circuit	DTC C1774/74: POWER SOURCE CIRCUIT
	TC terminal circuit	TC AND CG TERMINAL CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION
Vehicle height is extremely low when vehicle is parked	Air leakage	-
	Height control cylinder assembly rear	-
	Height control sensor link sub-assembly	SUSPENSION CONTROL SYSTEM
	Height control solenoid valve circuit	DTC C1737/31, C1738/32, C1739/33, C1740/34: RIGHT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; RIGHT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT
	Exhaust solenoid valve circuit	DTC C1735/35: EXHAUST SOLENOID VALVE CIRCUIT
Compressor motor continues to operate	Air leakage	-
	Air tube clogged	-
	Pneumaitc cylinder assembly	-
	Height control sensor link sub-assembly	SUSPENSION CONTROL SYSTEM
	Height control solenoid valve circuit	DTC C1737/31, C1738/32, C1739/33, C1740/34: RIGHT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; DTC C1738/32 LEFT FRONT HEIGHT CONTROL SOLENOID VALVE CIRCUIT; RIGHT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT; LEFT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT
	Exhaust solenoid valve circuit	DTC C1735/35: EXHAUST SOLENOID VALVE CIRCUIT
	Tank solenoid valve circuit	DTC C1744/44: TANK SOLENOID VALVE CIRCUIT
	AIR SUS relay circuit	DTC C1741/41: AIR SUSPENSION RELAY CIRCUIT
	Height control compressor circuit	DTC C1742/42: HEIGHT CONTROL COMPRESSOR CIRCUIT
	Suspension control ECU	DTC C1761/61: ECU MALFUNCTION