How to find a misfiring cylinder with Autel AP200 Scanner

If you’re troubleshooting like having a P0300 fault code “Random or multiple cylinder misfire detected”, you’ll typically need to find a misfiring cylinder. This test is called “Control selected cylinder fuel cut” that Autel MaxiAP AP200 can do it.

 

As we mentioned before, Autel MaxiPRO MP808TS can also do it perfectly.

 

It’ll drop each cylinder in the test. The misfiring cylinder would have the least effect on the vibration of the engine. When you drop a cylinder that’s working well, the tone of the engine should change, and it should vibrate a bit more.

 

 

Reasons for isolated cylinder misfire

There are a number of reasons for isolated cylinder misfires:

1. Dirty, clogged, leaky or broken fuel injector.
2. Weak/defective ignition coil.
3. Worn spark plug, especially for people who don’t replace back plugs as a set.
4. Mechanical issues: burn exhaust valve, blown head gasket.

 

How to find a misfiring cylinder via Autel AP200?

This is test on 2017 Honda Accord EX as an example.

 

Hook up the tool into OBD2, open Autel AP200 App, select

• Service >> Injector >> Honda >> Manual selection >> USA >> Hot function >> One injector stop

 

 

This function manually stops one injector.

Press “Yes” to continue.

 

Follow the tips to operate:

Start the engine.

Note: PHEV, FHEV and RLX hybrid vehicles must be put into maintenance mode for the engine to run. Refer to the service manual for detailed instructions.

 

I don’t have any of those models, so I’ll just start the engine.

It needs to get up to operating temperature for this test to happen.

 

• ECT sensor 1: 86.0℃(186.8°F)
• Keep the engine speed between 2000 RPM and 3000 RPM.
• Engine speed: 727RPM
• Engine coolant temperature: 82.0℃(179.6°F)

 

 

Do not press the throttle pedal.

 

Here are 4 injectors.

I’m going to dropping the cylinders one by one.

The car is going to vibrate a bit more, listen to the tone of the engine.

 

Press “No.1 injector”, the car is vibrating a bit more.

I can see it in the RPM, it just dropped.

Press “OK” to stop. The car is back to normal.

 

Test the 4 cylinders, there’s no noticeable effect, that would be the problem cylinder.

Same effect all across.

That means there’s not problem cylinder on the car.

 

 

Test has done!

Hope this is helpful.

 

 Great thanks to Auteldiag for making this article:http://blog.auteldiag.com/how-to-use-autel-ap200-to-find-a-misfiring-cylinder/

Best Cheap All-System Scanner for DIY Autel AP200

Just bought one portable scan tool device, Autel MaxiAP AP200. It is made to work with  mobile phone. I’m excited about this device because for do-it-yourselfers who are on a budget, but want a professional level scan tool, AP200 is one good solution to look at.

 

 

The packing covers a quick reference guide, basically tells you how to set it up. It looks easy. To set it up, please refer to

AP200 Quick Start Guide:

http://blog.auteldiag.com/autel-ap200-bluetooth-obd2-scanner-quick-start-guide/

 

This is an all system scanner, which will give you access to all modules, ABS, SRS, transmission, immobilizer...etc. It can work on Android & IOS system.

 

Compare to Autel MK808 scan tool, AP200 supports to do all the things that the MK808 is able to do. The only difference is that you’re doing it from your phone. In addition, AP200 is a very affordable device. I got this for, roughly, less than $60 from Auteldiag.com.

 

There are 4 main function on home page: diagnostics, service, history and repair reports.

 

 

• Diagnostics

Let’s connect with a Honda to do a all system diagnosis, that took about 3-4 minutes in real time. And it has gone through all the modules. There is a fault code B1175, it gives you a description of the DTC, and also tells you possible failures.

 

You can check ECU info, read codes, erase codes, or check live data here.

 

 

 

• Service

Go back to check special service, it supports to do oil reset, EPB, TPMS, BMS, brake bleed, DPF, IMMO keys, injector, SAS, suspension and throttle.

For TPMS service, you’re able to read TPMS codes, but you’re not able to relearn TPMS sensors. Because you’ll need a TPMS device like Autel TS508 to activate the TPMS sensors in tires.

 

 

 

• History

Here you can check all the cars that you’ve scanned.

 

• Repair Reports

If you’ve done repairs, you can get the reports here.

 

In summary, Autel AP200 is a very good all-system scanner dongle.

 

As you saw, AP200 took about 4 minutes for a full system diagnosis. Full system scans generally take time, even on my larger scan tool like Autel MP808TS, it does take a couple of minutes. So 4 minutes is not really a major issue for AP200.

 

Generally, I think AP200 is worth at its price point. Especially for DIYers. I don’t see any tools that would match this. There are a number of options out there, but some of them actually need to pay every single year to keep access to certain functions.

Source:http://blog.auteldiag.com/autel-ap200-review-best-cheap-all-system-scanner-for-diy/

 

 

How to Upload Data Logging reports in Autel MaxiAP AP200

Customer question: Where does AP200 upload data? Look at my pictures below, I can't find the data logging function anywhere.

Answer from Auteldiag's  enginner:

This is in the History record, log cannot be uploaded data here

 

 

The Data Logging section allows you to launch the Support platform directly to view all records of all sent or unsent (saved) data logging on the diagnostic system.
Today,Auteldiag will tell you how to record and upload theAutel AP200 Data Logging, We use a 2016 wrangler as an example,here you are:

To submit Data Logging reports in Autel Autel MaxiAP AP200:
1. Tap the Data Logging button. The button displays blue during the active recording process.








2. Tap the Data Logging button again to finish the recording. A submission form will display to let you fill in the report information.


3. Tap the Send button to submit the report form via the internet, a confirmation message displays when sending is successful


Works done!

 

https://www.auteldiag.com/service/sumit-data-logging-in-autel-maxiap-ap200.html

Autel MaxiAP AP200 Throttle Relearn

 

Autel MaxiAP AP200 is a Bluetooth OBD2 scanner, it does diagnostics and support many service functions like oil reset, EPB/BMS/SAS reset, DPF regeneration... Today I’m gonna show how to use it to reset the throttle position for a Dodge Nitro 2008, since the gas pedal is electronic.

 

Plug Autel AP200 into the OBD2 port, and turn ignition on.

 

Start the MaxiAP200 app to connect it via Bluetooth.

Here we go to

Service >> Throttle >> Dodge >> Manual selection >> 2008 >> KA-Nitro >> Hot function >> Learn electronic throttle control(ETC)(PCM) >> OK

 

It’ll start actually moving the gas pedal, just follow the prompts to operate:

• Press and hold down the accelerator pedal to the floor, the throttle must be held to the floor.
• Hold down the accelerator strongly to the floor.
• Release the accelerator pedal.
• Do not touch the accelerator pedal.
• Resetting ECU... please wait

Learn electronic throttle control (ETC) passed.

 

Let’s also do a test here, press

Electronic throttle control(ETC) throttle follower test(PCM) >> OK

Note: the engine must be stopped to carry out this test, to carry out this test, press the throttle pedal & the electronic throttle control(ETC) should follow.

 

It shows the voltage, like right now I’m at 1%, when I’m pressing the gas pedal, it’s going up to 77%.

 

Done!

Autel AP200 Diagnostic Tool is quite handy, easy and useful that every car owner should have one.

Related Video operate :Autel AP200 Throttle Relearn For 2017 GMC Yukon

https://www.auteldiag.com/