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Problem Symptoms Table

AIR SUSPENSION SYSTEM 

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 
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 
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