Diagnostic Trouble Code Chart

HINT:

Using SST 09843-18040, connect terminal TC and CG of DLC3.
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 "See page" under respective "DTC No." in the DTC chart.

DTC

DTC No.

Detection Item

Trouble Area

OFF Indicator Lamp⁽¹⁾

Memory⁽²⁾

C1713/13 (DTC C1713/13 RIGHT REAR HEIGHT CONTROL SENSOR CIRCUIT, DTC C1714/14 LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT )

Open or short circuit in right rear height control sensor circuit

Height control sensor sub-assy rear RH
Right rear height control sensor circuit

O⁽³⁾

C1714/14 (DTC C1713/13 RIGHT REAR HEIGHT CONTROL SENSOR CIRCUIT, DTC C1714/14 LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT )

Open or short circuit in left rear height control sensor circuit

Height control sensor sub-assy rear LH
Left rear height control sensor circuit

O⁽³⁾

C1715/15 (DTC C1715/15 RIGHT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1716/16 LEFT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1717/17 REAR ACCELERATION SENSOR CIRCUIT, DTC C1791/91 RIGHT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1792/92 LEFT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1793/93 REAR ACCELERATION SENSOR CIRCUIT )

Open or short circuit in right front acceleration sensor circuit

Acceleration sensor assy front RH
Right front acceleration sensor circuit

C1716/16 (DTC C1715/15 RIGHT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1716/16 LEFT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1717/17 REAR ACCELERATION SENSOR CIRCUIT, DTC C1791/91 RIGHT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1792/92 LEFT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1793/93 REAR ACCELERATION SENSOR CIRCUIT )

Open or short circuit in left front acceleration sensor circuit

Suspension control ECU (Acceleration sensor front LH is a built-in equipment)

C1717/17 (DTC C1715/15 RIGHT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1716/16 LEFT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1717/17 REAR ACCELERATION SENSOR CIRCUIT, DTC C1791/91 RIGHT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1792/92 LEFT FRONT ACCELERATION SENSOR CIRCUIT, DTC C1793/93 REAR ACCELERATION SENSOR CIRCUIT )

Open or short circuit in rear acceleration sensor circuit

Acceleration sensor rear
Rear acceleration sensor circuit

C1725/21 (DTC C1725/25 RIGHT FRONT ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1726/26 LEFT FRONT ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1727/27 RIGHT REAR ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1728/28 LEFT REAR ABSORBER CONTROL ACTUATOR CIRCUIT )

Open or short circuit in right front absorber control actuator circuit

Absorber control actuator front RH
Right front absorber control actuator circuit

C1726/22 (DTC C1725/25 RIGHT FRONT ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1726/26 LEFT FRONT ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1727/27 RIGHT REAR ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1728/28 LEFT REAR ABSORBER CONTROL ACTUATOR CIRCUIT )

Open or short circuit in left front absorber control actuator circuit

Absorber control actuator front LH
Left front absorber control actuator circuit

C1727/23 (DTC C1725/25 RIGHT FRONT ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1726/26 LEFT FRONT ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1727/27 RIGHT REAR ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1728/28 LEFT REAR ABSORBER CONTROL ACTUATOR CIRCUIT )

Open or short circuit in right rear absorber control actuator circuit

Absorber control actuator rear RH
Right rear absorber control actuator circuit

C1728/24 (DTC C1725/25 RIGHT FRONT ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1726/26 LEFT FRONT ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1727/27 RIGHT REAR ABSORBER CONTROL ACTUATOR CIRCUIT, DTC C1728/28 LEFT REAR ABSORBER CONTROL ACTUATOR CIRCUIT )

Open or short circuit in left rear absorber control actuator circuit

Absorber control actuator rear LH
Left rear absorber control actuator circuit

C1733/33 (DTC C1733/33 GATE SOLENOID VALVE CIRCUIT, DTC C1734/34 LEVELING SOLENOID VALVE CIRCUIT, DTC C1735/35 EXHAUST SOLENOID VALVE CIRCUIT, DTC C1744/44 TANK SOLENOID VALVE CIRCUIT )

Open or short circuit in gate solenoid valve circuit

Gate solenoid valve
Gate solenoid valve circuit

C1734/34 (DTC C1733/33 GATE SOLENOID VALVE CIRCUIT, DTC C1734/34 LEVELING SOLENOID VALVE CIRCUIT, DTC C1735/35 EXHAUST SOLENOID VALVE CIRCUIT, DTC C1744/44 TANK SOLENOID VALVE CIRCUIT )

Open or short circuit in leveling solenoid valve circuit

Leveling solenoid valve
Leveling solenoid valve circuit

C1735/35 (DTC C1733/33 GATE SOLENOID VALVE CIRCUIT, DTC C1734/34 LEVELING SOLENOID VALVE CIRCUIT, DTC C1735/35 EXHAUST SOLENOID VALVE CIRCUIT, DTC C1744/44 TANK SOLENOID VALVE CIRCUIT )

Open or short circuit in exhaust solenoid valve circuit

Exhaust solenoid valve
Exhaust solenoid valve circuit

C1741/41 (DTC C1741/41 AIR SUS RELAY CIRCUIT )

Open or short circuit in AIR SUS relay circuit

AIR SUS relay
AIR SUS relay circuit

C1742/42 (DTC C1742/42 HEIGHT CONTROL COMPRESSOR CIRCUIT )

Lock, open or short circuit in height control compressor circuit

Height control compressor assy
Height control compressor circuit

C1744/44 (DTC C1733/33 GATE SOLENOID VALVE CIRCUIT, DTC C1734/34 LEVELING SOLENOID VALVE CIRCUIT, DTC C1735/35 EXHAUST SOLENOID VALVE CIRCUIT, DTC C1744/44 TANK SOLENOID VALVE CIRCUIT )

Open or short circuit in tank solenoid valve circuit

Tank solenoid valve
Tank solenoid valve circuit

C1751/51⁽⁴⁾ (DTC C1751/51 CONTINUOUS ELECTRIC CURRENT TO HEIGHT CONTROL COMPRESSOR )

Continuous electric current to height control compressor circuit

Height control compressor assy
Height control compressor circuit
Height control sensor link sub-assy rear
Height control sensor sub-assy rear
Relief valve
AIR SUS relay comes off
Air leakage from the air tube or each valve
Clogging in the air tube or each valve

C1761/61 (DTC C1761/61 ECU MALFUNCTION )

ECU malfunction

Suspension control ECU

C1774/74 (DTC C1774/74 POWER SOURCE CIRCUIT )

Power voltage drop

Battery
Power source circuit

C1776/76 (DTC C1776/76 SPEED SENSOR CIRCUIT, DTC C1794/94 RIGHT FRONT SPEED SENSOR CIRCUIT, DTC C1795/95 LEFT FRONT SPEED SENSOR CIRCUIT )

Speed sensor circuit malfunction

Speed sensor
Speed sensor circuit
Skid control ECU assy

C1777/77 (DTC C1777/77 STEERING ANGLE SENSOR CIRCUIT )

Open or short circuit in steering angle sensor circuit

Steering sensor
Steering angle sensor circuit

C1779/79 (DTC C1779/79 CRANKSHAFT POSITION SENSOR CIRCUIT, DTC C1797/97 CRANKSHAFT POSITION SENSOR CIRCUIT )

Crankshaft position sensor circuit

Crankshaft position sensor
Crankshaft position sensor circuit
ECM

⁽¹⁾	For codes with "CIRCLE" mark in the "Indicator Light" column, the height control OFF indicator light blinks at 1 second intervals.

⁽²⁾	The codes with "CIRCLE" mark in the "Memory" column are stored in the memory even when the ignition switch is OFF, but the codes with "X" mark are not.

⁽³⁾	Height control OFF indicator lamp blinks when the vehicle speed is at 3 km/h or higher.

⁽⁴⁾

Since the relief pressure of the compressed air is 980 kPa (10 kgf/cm² ,142 psi), if the vehicle height control is attempted on a steeply sloping road, when the vehicle is overloaded, or when the vehicle is jacked up with the engine running, code "C1751/51" may be output and the vehicle height control may be suspended (This is not abnormal.). In this case, however, the vehicle height operation resumes approx. 10 min. after the ignition switch is turned ON after the ECU detects the first error. If ECU detects another error, it takes 70 minutes until the vehicle height control is resumed.