WM534 - Remote Throttle Switch Module

The WM-534 remote switch module is an electrically-actuated pole, double-throw switch that allows an operator to select between two independent stations. It can also be used to coordinate the operation of several functions from one station. It is designed for very low voltages and currents typically present in electronic engine throttle applications. 

THROTTLE VALVE SWITCH FAULTY: SYMPTOMS 

A faulty throttle valve switch can cause the following: 

• Engine switches off during idle 
• Engine lurches under full load 

CAUSES OF A FAULTY THROTTLE SWITCH: CAUSE OF FAILURE 

The causes of a faulty throttle valve switch could be: 

• Mechanical damage (e.g. due to vibrations) 
• Contact fault at the electrical connection (corrosion, humidity) 
• Contact fault at the internal switch contacts (humidity, contamination) 

Types of Throttle Switch Sensors 

• with end switches 
• potentiometer type 
• combination of both above 

FAQS 

What does a throttle switch do? 

A throttle switch informs the engine control unit about the valve’s position. It does this so that the mixture and ignition can be adjusted to suit the respective load. As they are mounted directly onto the throttle valve shaft, the various switch positions are transmitted to the engine management control unit and assist in the calculation of the required fuel quantity. 

How do you know if your throttle position sensor is bad?  

A throttle switch shows various symptoms to watch out for such as lack of power, uneven idle and lack of acceleration.  

The causes of a faulty throttle valve switch could be: 

• Mechanical damage (e.g. due to vibrations) 
• Contact fault at the electrical connection (corrosion, humidity) 
• Contact fault at the internal switch contacts (humidity, contamination) 

What is a throttle sensor switch? 

A throttle position sensor switch is used to monitor the throttle valve position in internal combustion engines.