C1740 LEXUS, TOYOTA: LEFT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT
POST UPDATED IN May, 2023
C1740 LEXUS, TOYOTA: LEFT REAR HEIGHT CONTROL SOLENOID VALVE CIRCUIT
The Electronic Suspension Control Unit activates the height control solenoid, which opens the valve and conducts the compressed air to the pneumatic cylinder. This action raises the height of the car. When the vehicle height is low, the ECU energizes the solenoid and the exhaust valve that opens the valve and discharges the compressed air in the pneumatic cylinder into the atmosphere.
The front and rear height control valves have some solenoid valves that control the right and left pneumatic cylinders separately. On the compressor unit you may find the exhaust valve, there is just one valve there.
The diagnostic code C1740 OBDII is set when a malfunction is detected in the left rear height control solenoid valve circuit.
The C1740 OBD2 fault code is set for the following reasons:
To troubleshoot DTC C1740 OBDII, try this: