DTC C1763/63, C1764/64: Abnormal Oil Pressure due to not Opening Leveling Valve; Abnormal Oil Pressure due to not Opening Accumulator Valve: Description

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION CONDITION TABLE

DTC No.	DTC Detection Condition	Trouble Area
C1763/63	When the pump and motor is ON and the pump delivery pressure has exceeded 15.8 MPa continuously for 0.3 sec.	Control valve assembly Fluid pressure sensor Fluid clog in the fluid line or each solenoid valve Suspension control ECU Wire harness
C1764/64	When the pump and motor is ON and the pump delivery pressure has exceeded 15.8 MPa continuously for 0.3 sec.	Height control accumulator solenoid Fluid pressure sensor Fluid clog in the fluid line or each solenoid valve Suspension control ECU Wire harness

Fail-safe function:

If the DTC C1763/63 detected, the height control is prohibited after the following controls are performed.
- In case that the height of the defect wheel is -10 to +10 mm against the other wheels, adjust the normal wheels to the standard height.
- In case that the height of the defect wheel is more than 10 mm higher than the other wheels, adjust the normal wheels 10 mm higher.
- In case that the height of the defect wheel is less than 10 mm lower than the other wheels, adjust the normal wheels 10 mm lower.
If the DTC C1764/64 detected, the ECU prohibits the control of accumulating the releasing of the pressure of the height control accumulator.