Diagnostic Trouble Code Table

HINT:

If no abnormality is found when the parts are inspected, inspect the suspension control ECU.
If a malfunction code is displayed during the DTC check, check the circuit listed for that code. For details of each code, refer to the information in the DTC table.

DTC table of Air Suspension System:

DTC TABLE OF AIR SUSPENSION SYSTEM

DTC No.

Detection Item

Trouble Area

OFF Indicator Light

C1711/11

Front Height Control Sensor RH Circuit Malfunction

Height control sensor sub-assembly front RH
Right front height control sensor circuit
Suspension control ECU

Comes on

C1712/12

Front Height Control Sensor LH Circuit Malfunction

Height control sensor sub-assembly front LH
Left front height control sensor circuit
Suspension control ECU

Comes on

C1713/13

Right Rear Height Control Sensor Circuit

Height control sensor sub-assembly rear RH
Right rear height control sensor circuit
Suspension control ECU

Comes on

C1714/14

Left Rear Height Control Sensor Circuit

Height control sensor sub-assembly rear LH
Left rear height control sensor circuit
Suspension control ECU

Comes on

C1735/35

Exhaust Solenoid Valve Circuit

Exhaust solenoid valve
Exhaust solenoid valve circuit
Suspension control ECU

Comes on

C1737/31

Right Front Height Control Solenoid Valve Circuit

Height control solenoid valve front RH
Right front height control solenoid valve circuit
Suspension control ECU

Comes on

C1738/32

Left Front Height Control Solenoid Valve Circuit

Height control solenoid valve front LH
Left front height control solenoid valve circuit
Suspension control ECU

Comes on

C1739/33

Right Rear Height Control Solenoid Valve Circuit

Height control solenoid valve rear RH
Right rear height control solenoid valve circuit
Suspension control ECU

Comes on

C1740/34

Left Rear Height Control Solenoid Valve Circuit

Height control solenoid valve rear LH
Left rear height control solenoid valve circuit
Suspension control ECU

Comes on

C1741/41

Air Suspension Relay Circuit

AIR SUS relay
AIR SUS relay circuit
Suspension control ECU

Comes on

C1742/42

Height Control Compressor Circuit

Height control compressor motor
Height control compressor circuit

Comes on

C1744/44

Tank Solenoid Valve Circuit

Tank solenoid valve
Tank solenoid valve circuit
Suspension control ECU

Goes off

C1751/51 (⁽¹⁾)

Continuous Electric Current to Height Control Compressor

Height control compressor motor
Height control compressor circuit
Each height control sensor link sub-assembly
Each height control sensor sub-assembly
Relief valve
AIR SUS relay comes off
Air leakage from the air tube or each valve
Clogging in the air tube or each valve
Suspension control ECU

Goes off

C1761/61

ECU Malfunction

Height control sensor sub-assembly power source
Suspension control ECU

Come on

C1774/74 (⁽²⁾)

Power Source Circuit

Battery
Power source circuit
Suspension control ECU

Goes off

C1776/76

Speed Sensor Circuit

Speed sensor
Speed sensor circuit
Brake actuator assembly (Skid control ECU)
Suspension control ECU

Goes off

C1779/79

Crankshaft Position Sensor Circuit

Crankshaft position sensor
Crankshaft position sensor circuit
ECM
Suspension control ECU

Goes off

C1782/82

Stop Light Switch Circuit

Stop light switch assembly
Stop light switch circuit
Suspension control ECU

C1784/84

Right Rear Speed Sensor Circuit

Speed sensor
Speed sensor circuit
Brake actuator assembly (Skid control ECU)

C1785/85

Left Rear Speed Sensor Circuit

Speed sensor
Speed sensor circuit
Brake actuator assembly (Skid control ECU)

C1786/86

Height Control Switch Circuit

Height control switch
Height control switch circuit
Suspension control ECU

C1788/88

Height Control OFF Switch Circuit

Height control OFF switch
Height control OFF switch circuit
Suspension control ECU

C1797/97

Crankshaft Position Sensor Circuit

Crankshaft position sensor
Crankshaft position sensor circuit
ECM
Suspension control ECU

C1799/99

Access Mode Switch Circuit

Access mode switch
Access mode switch circuit
Suspension control ECU

⁽¹⁾	Code C1751/51 may be output, even through there is no trouble in the system, when the vehicle is fully loaded with passengers and luggage on a bumpy road or stopped, and the air tube freezes over.

⁽²⁾	The codes are not memorized after turning the ignition switch off.