Honda Foreman 500 Angle Sensor Reset (Step-by-Step Guide!)

The Honda Foreman 500 is an all-terrain vehicle of superior performance unveiled in 2005. But if the angle sensor on the Honda Foreman 500 is defective, various performance issues will occur.

A faulty angle sensor may cause starting problems, erroneous gear selection, etc. However, it can be resolved. 

First, to reset the angle sensor, use the service manual provided with your Honda Foreman 500 ATV to determine whether the sensor is out of spec. If it is faulty, clean the backplate, the brush attachment, and the resistance strip. 

Apply dielectric grease and put it back together, aligning up the backplate with the marks for taking it apart. Put the sensor in place and reset it. 

Thoroughly read this article to learn Honda Foreman 500 Angle Sensor Reset

What is the Function of an Angle Sensor? 

An angle sensor is in charge of providing input to the Electronic Control Unit (ECU) about the angle of your quad bike. 

The angle sensor detects the angle at which the vehicle is tilted in relation to the ground. 

The sensor coordinates with the engine management system, transmission, and other systems to guarantee reliable operation and the safety of the users.

The angle sensor in a Honda Foreman 500 ATV serves an essential purpose by detecting the inclination and angle of the vehicle and transmitting readings to the ECM to calculate the angle the rider is facing. 

The ATV’s shifting system would be useless without the angle sensor. It controls the transmission to shift gears more smoothly. 

This improves power delivery and traction on different surfaces.

The ATV’s starting system benefits from the information provided by the angle sensor. With this data, the system can set the ignition timing and fuel-air ratio for a foolproof engine start.

Symptoms of a Defective Honda Foreman 500 Angle Sensor

But sometimes, the Foreman 500’s angle sensor is responsible for various performance issues. Some of the most prevalent symptoms involve the following:

Error codes: A defective angle sensor can cause the ATV’s onboard computer to generate error codes, which may be displayed on the dashboard or via diagnostic tools.

Inaccurate Display: If the angle sensor is not functioning, the Honda Foreman 500’s display may not accurately reflect the vehicle’s tilt and angle.

Starting Difficulties or Stalling: The angle sensor also influences the ATV’s starting system. A malfunctioning sensor can cause the engine to stall or make it difficult to start the engine, leading to worsening situations. 

A faulty angle sensor can also cause the ATV to stop, particularly when accelerating or climbing a hill.

Unstable Handling: When the angle sensor malfunctions, the Foreman 500 may feel unsafe and challenging to control, especially during tight turns or uneven terrain.

Unresponsive or Sluggish Shifting: The angle sensor is essential to the shifting system of an ATV. A faulty sensor can cause delays or unresponsiveness when adjusting gears, making the vehicle difficult to control.

Loss of Power or Reduced Acceleration:  A malfunctioning angle sensor can result in a loss of power or a reduction in acceleration, making it more difficult for the ATV to ascend hills or traverse rough terrains effectively.

Inconsistent Throttle Response: The angle sensor communicates with the ATV’s throttle system, and a defective sensor can result in unpredictable throttle response. There may be fluctuations in engine speed, making it challenging to maintain a constant pace.

If your Honda Foreman 500 has these problems, you must fix them immediately to ensure it works safely and competently. You may need to reset or replace the angle sensor to fix these problems.

Honda Foreman 500 Angle Sensor Reset: Step-By-Step Guide

The angle sensors are nothing more than a pair of contact brushes mounted on a spring-loaded wheel that turns along an electrically conductive strip with varying resistance. Most of the causes of a bad angel sensor that produces error codes are-

  • Excessive wear to the brush tips or conductive strip
  • Water entering the sensor housing due to dried out or narrowed O-ring. This leads to oxidation and disruption of the connection between the contact points.

However, the problems are fixable instead of the need for the replacement. 

Let’s investigate these problems and discuss simple instructions to fix the angle sensor.

Tools You Need to Fix the Problem

Some of the most common tools that you would require are the followings: 

  • Excel blade
  • Tweezers or needle nose pliers
  • Fine quality needle files or grit sandpaper
  • Dielectric grease
  • Super glue
  • DMM (Digital Multimeter)
  • Silicone

Step-1: Determine whether the sensor is out of spec

  • Download a service manual and look at the steps for testing whether the sensor is out of spec or not.

Step-2: Pull off the backplate

  • If the sensor is faulty, mark the sensor housing and backplate so that you know where to position the plate during assembly.
  • Locate a thin ring around the outside of the backplate
  • Slide the razor under the lip and break off the lip.
  • Pull off the backplate carefully, as there is a spring underneath.

Step-3: Remove the brush attachment

  • Be extra careful, as the tips of the contact brushes may bend or break off.

Step-4: Remove the resistance strip

  • First, remove the retaining clip using a set of tweezers or needle nose pliers.
  • Then remove the resistance strip.
  • Check three small contact pins at one end of the resistance strip, and contact pins remain in the sensor housing. They often get oxidized or corroded due to moisture.

Step-5: Clean everything

  • Use grit sandpaper or needle files to clean the contacts on the sensor housing and spray electronics cleaner.
  • Use a needle file to scrap the contact points on the resistance strip gently.
  • Apply a drop of dielectric grease to the center of the sensor housing. This will help to turn the brush wheel quickly as well as to repel moisture.
  • Reinstall the spring as before and place the backplate onto it.
  • Use small clumps to hold them together and squeeze them back into the sensor housing. Align the backplate with the marks you made in the beginning.
  • Use a digital multimeter to verify that the work you have done so far has paid off.

Step-6: Reinstall the sensor

  • Apply a bit of ultra-black silicone on top of the O-ring. This will help to repel water.
  • Put the sensor back into the sensor bracket.
  • Ensure that the bolts and torque are at specs.
  • Apply a bit of dielectric grease to the plug and reattach the harness.

Step-7: Reset the sensor

  • Gearshift in neutral
  • Dial in D2
  • Hold up and down on your ESP and turn on the key with another hand. As soon as the key comes on, the neutral light will blink.
  • Release the button and press up-down-up as soon as the key comes on.
  • Then press the throttle and let it go. You will hear a sound which is for DCM reset.

The angle sensor of your Honda Foreman 500 will eventually be reset.  

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