DTC C1718/18: Pressure Sensor Circuit Malfunction: Description

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

This circuit is sending the data to detect the pressure output from the pump and to judge the abnormality of the fluid pressure by the ECU.

HINT:

"Pressure sensor" refers to the fluid pressure sensor.

DTC DETECTION CONDITION TABLE

DTC No.	DTC Detecting Condition	Trouble Area
C1718/18	When one of following conditions is met: When detecting the abnormal signal from the fluid pressure sensor (Fluid pressure sensor terminal voltage of ECU is 0.3 V or less or 4.7 V or more) for every 0.01 sec. and that condition continued for 1 sec. While the motor relay is not operating, the condition that the fluid pressure exceeds 1 MPa continued for 10 sec.	Fluid pressure sensor Suspension control ECU Wire harness

Fail-safe function:

If a trouble occurs in the fluid pressure sensor circuit, the height control is prohibited after the ECU has adjusted the vehicle height to the standard.