AIR SUSPENSION SYSTEM DIAGNOSTIC TROUBLE CODE CHART

Note

Turn the ignition switch off before removing parts.

Tech Tips

If no abnormality is found when inspecting parts, inspect the suspension control ECU and ground points for poor contact.
If a trouble code is output during the DTC check, check the trouble areas listed for the DTC. For details of each code, refer to the "See page" for the respective "DTC Code" in the DTC chart.
When 2 or more DTCs are output, perform circuit inspections one by one until the problem is identified.
Inspect the fuse and relay before investigating the trouble areas as shown in the table below.

Air Suspension System
DTC Code	Detection Item	Warning Indicated	See page
C1713/13	Rear Height Control Sensor RH Circuit Malfunction	Indicated	Click here
C1714/14	Rear Height Control Sensor LH Circuit Malfunction	Indicated	Click here
C1715/15	Front Acceleration Sensor RH Malfunction	Not indicated	Click here
C1716/16	Front Acceleration Sensor LH Malfunction	Not indicated	Click here
C1717/17	Rear Acceleration Sensor Malfunction	Not indicated	Click here
C1731/31	FR Damping Force Control Actuator Circuit	Not indicated	Click here
C1732/32	FL Damping Force Control Actuator Circuit	Not indicated	Click here
C1733/33	RR Damping Force Control Actuator Circuit	Not indicated	Click here
C1734/34	RL Damping Force Control Actuator Circuit	Not indicated	Click here
C1745/45	Exhaust Solenoid	Indicated	Click here
C1746/46	Gate Solenoid Valve Circuit	Indicated	Click here
C1747/47	Leveling Solenoid Valve Circuit	Indicated	Click here
C1751/51	Compressor Relay Coil Malfunction	Indicated	Click here
C1752/52	Compressor Motor Malfunction	Indicated	Click here
C1761/61*1	Continuous Current to Compressor Motor	Not indicated	Click here
C1762/62*2	Continuous Current to Exhaust Solenoid	Not indicated	Click here
C1781/81	Suspension Control ECU Malfunction	Indicated	Click here
C1782/82	Low Battery Positive Voltage	Not indicated	Click here
C1783/83	Front Wheels Speed Sensor Signal Malfunction	Indicated	Click here
C1784/84	Steering Sensor Signal Malfunction	Not indicated	Click here
C1787/87	(Horizontality) G Sensor Malfunction	Not indicated	Click here
C1789/89	Vehicle Identification Malfunction	Not indicated	Click here
C1791/91	Adaptive Variable Suspension (AVS) Switch Circuit (Test Mode DTC)	Test Mode DTC	Click here
C1792/92	Height Control Switch Circuit (Test Mode DTC)	Test Mode DTC	Click here
C1794/94	Height Control OFF Switch Circuit (Test Mode DTC)	Test Mode DTC	Click here
C1796/96	(Up & Down) G Sensor FR	Test Mode DTC	Click here
C1797/97	(Up & Down) G Sensor FL	Test Mode DTC	Click here
C1798/98	(Up & Down) G Sensor Rear	Test Mode DTC	Click here
U0100/71	Lost Communication with ECM/PCM "A"	Not indicated	Click here
U0114/71	Lost Communication with Four-Wheel Drive Clutch Control Module	Not indicated	Click here
U0122/71	Lost Communication with Vehicle Dynamics Control Module	Indicated	Click here
U0124/71	Lost Communication with Lateral Acceleration Sensor Module	Not indicated	Click here
U0126/71	Lost Communication with Steering Angle Sensor Module	Not indicated	Click here
U0140/71	Lost Communication with Body Control Module	Not indicated	Click here

*1: The system may store DTC C1761/61 even when the system is normal if one of the following occurs: 1) the vehicle is full of passengers and the luggage compartment is full; 2) the vehicle is being driven or is stopped on an irregular surface; or 3) the air ducts are frozen.
*2: The system may store DTC C1762/62 even when the system is normal if one of the following occurs: 1) the vehicle is being driven or is stopped on an irregular surface; or 2) the air tubes are clogged with snow or are frozen. If DTC C1762/62 is stored, vehicle height control stops. However, if the ignition switch is turned off and then to ON, vehicle height control starts.