How to Test a Harley Davidson Map Sensor

If your Harley Davidson is having issues with the engine, one of the parts you will want to test is the map sensor. The map sensor is responsible for reading the air pressure in the intake and sending that information to the ECU. This allows the ECU to adjust the fuel mixture accordingly.

A faulty map sensor can cause a number of problems, including poor performance, decreased fuel economy, and hard starting. In this article, we’ll show you how to test a Harley Davidson map sensor.

2020 Harley Davidson Iron 883 Update | T-MAP Sensor | Check Engine Light | Diagnostic codes.

  • Harley Davidson map sensors are located on the engine, near the throttle body
  • To test the sensor, you will need a multimeter
  • With the engine off, disconnect the sensor’s electrical connector
  • Set your multimeter to read ohms and touch the leads to the sensor’s terminals
  • The reading should be between 1 and 3 ohms if the sensor is working properly

Harley Map Sensor Failure Symptoms

The Harley Map Sensor Failure Symptoms are as follows: 1. Loss of power 2. Backfiring

3. Poor fuel economy 4. Sputtering 5. Stalling

6. Hesitation 7. Rough idle 8. Check engine light If you experience any of these symptoms, it’s possible that your map sensor has failed and needs to be replaced.

Map Sensor Trick

A map sensor trick is a way to improve the performance of your vehicle’s engine. By installing a map sensor, you can improve the accuracy of your engine’s air/fuel mixture. This will result in better fuel economy and reduced emissions.

How to Test Map Sensor Without Multimeter

If your car is having trouble starting, stalling, or idling rough, the map sensor could be to blame. The map sensor measures the amount of vacuum in the intake manifold and sends this information to the engine control unit. This helps the ECU determine how much fuel to inject and when to ignite the spark plugs.

A faulty map sensor can cause all sorts of drivability issues, so it’s important to test it if you think it might be failing. Here’s how to test a map sensor without a multimeter: 1. Check for visual signs of damage.

If themap sensor has any cracks or other physical damage, it needs to be replaced. 2. Check for vacuum leaks. Make sure there are no leaks in the intake manifold or anywhere else between the map sensor and the engine.

A leak will prevent the map sensor from getting an accurate reading of vacuum levels. 3. Check electrical connections. Make sure all wires and connectors are securely attached to the map sensor and free of corrosion.

4 . Test with a scan tool . If you have access to a scan tool that can read live data, check for proper operation of the map sensor while driving .

Map Sensor Testing With Multimeter

A map sensor is an important part of a car’s engine management system. It tells the computer how much air is flowing into the engine so that the correct amount of fuel can be injected. If the map sensor isn’t working properly, the engine will run lean or rich and may eventually stall.

To test a map sensor with a multimeter, you’ll need to locate the map sensor on your vehicle and disconnect it from the wiring harness. Once you have access to the bare sensor, set your multimeter to the ohms setting and touch each of the three terminals on the sensor with one lead of the meter. The resistance should be between 1.5 and 2.5 kilohms at 70 degrees Fahrenheit (21 degrees Celsius).

If it’s outside of this range, replace your map sensor.

Harley Map Sensor Voltage

Harley Map Sensor Voltage The Harley MAP sensor is located on the side of the engine, under the left side cover. It reads manifold pressure and sends a signal to the ECM.

The most common symptom of a failing MAP sensor is a loss of power while riding. Other symptoms can include poor fuel economy and engine hesitation. If you suspect your Harley MAP sensor is failing, take it to your local dealer or mechanic for diagnosis and repair.

Harley Davidson Map Sensor Problems

If you own a Harley Davidson, you may eventually experience map sensor problems. The map sensor is responsible for monitoring the air pressure inside the intake manifold. If the pressure gets too high, it can cause the engine to run lean and produce less power.

In some cases, it can even cause the engine to stall. There are a few symptoms that may indicate you have map sensor problems. If your Harley Davidson is idling rough or stalls frequently, this is one sign.

Another symptom is if your bike feels like it’s running out of power, especially at higher speeds. If you notice any of these issues, it’s important to get your Harley Davidson checked out by a professional as soon as possible. Harley Davidson dealerships have special equipment that can diagnose map sensor problems quickly and easily.

Once they’ve determined that the map sensor is faulty, they can replace it with a new one. This should fix the problem and help keep your Harley Davidson running smoothly for years to come.

Harley Map Sensor Replacement

If you have a Harley with a carbureted Twin Cam 88 engine, chances are you’ve had to replace the map sensor at some point. The map sensor is located on the left side of the engine and is responsible for sending information to the computer about air pressure and temperature. Over time, these sensors can go bad and cause your bike to run poorly.

Fortunately, replacing a map sensor on a Harley is relatively easy and only takes a few minutes. Here’s a step-by-step guide to help you get the job done: 1. First, remove the seat so you have access to the battery.

Then, disconnect the negative terminal from the battery. 2. Next, locate the map sensor on the left side of the engine. It will be mounted near the throttle body assembly.

3. Use a wrench or socket to remove the two bolts that hold the sensor in place. Carefully pull out the old sensor and discard it. 4 .

Now, take your newmap sensor and insert it into place . Make sure it’s snugged up againstthe throttle body assembly before tightening downthe bolts . Reconnectthe negative terminalto your batteryand then test ride your bike to make sure everything is working properly .

How to Test a Harley Davidson Map Sensor


How Do I Know If My Map Sensor is Faulty?

If your MAP sensor is faulty, you’ll likely see one or more of the following symptoms: – Your engine will run leaner than normal – You’ll have a decrease in fuel economy

– Your engine will run hotter than normal – You may see an increase in exhaust emissions

How Do I Test a Map Sensor?

MAP sensors are used in many different types of vehicles, so it’s important to know how to test them. There are a few different ways that you can do this, but the most common way is with a multimeter. To test your MAP sensor with a multimeter, first make sure that the sensor is disconnected from the engine.

Then, set your multimeter to the ohms setting and touch the probes to the two terminals on the sensor. You should see a reading of around 1-2 ohms. If you don’t see this reading, then your MAP sensor is most likely faulty and will need to be replaced.

What Happens When Map Sensor is Unplugged?

What happens when a MAP sensor is unplugged? Assuming that you have an OBD-II vehicle, the check engine light will illuminate on the dash and a diagnostic trouble code (DTC) will be stored in the vehicle’s computer. The code that would be associated with a MAP sensor being unplugged is P0105.

This DTC indicates that there is an issue with the MAP sensor signal being out of range. When the MAP sensor is unplugged, it essentially tells the computer that there is no intake vacuum present. This confuses the computer because it uses intake vacuum as one of the main inputs to determine how much fuel to inject into the cylinders.

Without knowing how much vacuum is present, the computer has no way of knowing how much fuel to inject which can lead to driveability issues. Some common symptoms of a P0105 DTC are: -the check engine light being illuminated on the dash

-poor acceleration -rough idle -stalling

If you experience any of these symptoms and have a P0105 DTC stored in your computer, chances are good that your MAP sensor is unplugged or faulty.

How Do You Use a Multimeter on a Map Sensor?

Assuming you would like a blog post discussing how to use a multimeter on a MAP sensor: A multimeter is an important tool when troubleshooting and diagnosing electrical issues. When testing a MAP sensor, you’ll want to check the voltage output of the sensor with the engine at idle and then again at higher RPMs.

To do this, you’ll need to connect the positive lead of your multimeter to one of the leads on the MAP sensor, and then touch the negative lead of your multimeter to ground. With the engine off, you should see around 0.45 volts. If you see anything outside of that range, there may be an issue with your MAP sensor.

When testing the MAP sensor with the engine running, you should see between about 1-4 volts depending on how high the RPMs are. If you see anything outside of that range, it could indicate a problem with your MAP sensor or another issue entirely. If you suspect your MAP sensor is not functioning properly, it’s always best to consult with a professional mechanic or auto technician to get an accurate diagnosis and repairs as needed.


Harley Davidson motorcycles are equipped with a map sensor that allows the rider to monitor engine performance. The map sensor is located under the gas tank and is used to measure air pressure in the intake manifold. By monitoring the air pressure, the map sensor can adjust the fuel mixture delivered to the engine.

To test the Harley Davidson map sensor, you will need a digital multimeter. Set your multimeter to read volts DC and attach the positive lead to the white wire on the map sensor connector. Attach the negative lead to ground and start your motorcycle engine.

The voltmeter should read between 0.5 and 4.5 volts DC when idle and increase as you rev up the engine.

Owner at Autopartslife
Hello, I am Michael Smith, founder of Autopartslife blog, which teaches automotive techniques, solutions, tips, tool reviews, and more.

Michael Smith is a professional automotive technician who has been diagnosing and repairing vehicles in Alaska County for more than 15 years. As founder and CEO of Autopartslife, Michael is dedicated to sharing his vast array of knowledge and experience to help make your automotive journey a much smoother, faster, and more enjoyable ride.
Michael Smith
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