Monitor Description

WARNING: This page is about a different variant/trim than selected.

The ECM receives a frequency signal (WPI) from the water inlet housing with water pump sub-assembly and calculates the speed of the water inlet housing with water pump sub-assembly. The ECM outputs an operation duty signal (WPO) to steplessly control the speed of the water inlet housing with water pump sub-assembly. If the duty signal (WPI) indicates that the water inlet housing with water pump sub-assembly is stopped even though the ECM is outputting an operation duty signal (WPO), the ECM judges that the water inlet housing with water pump sub-assembly is stuck and stores this DTC.

As the frequency signal (WPI) is 4 Hz when the water inlet housing with water pump sub-assembly is stopped to enable the ECM to detect an open or short in the signal line, the water inlet housing with water pump sub-assembly speed will be displayed as approximately 160 rpm even when the pump is stopped.