DTC C1751/51: Continuous Electric Current to Height Control Compressor: 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.

In case that the height control has not consisted in spite of performing the raise control for a certain period of time, the ECU interrupts the height control.

DTC DETECTION CONDITION TABLE

DTC No.	DTC Detection Condition	Trouble Area
C1751/51	When the rise control completion condition has not consisted is in spite of turning on electricity to the relay for the following period of time LO --> N: 85 seconds N --> HI: 100 seconds	AHC pump and motor AHC motor relay Height control sensor link comes off Fluid leakage from the fluid line or each solenoid valve Fluid clog in the fluid line or each solenoid valve Torsion bar spring Suspension control ECU Wire harness

Fail-safe function:

If a trouble occurs, the height control is prohibited after adjusting the vehicle to the standard height in case that the height is higher than the standard or to the lowest wheel of the 4 wheels in case that the height is lower than the standard.