Autel AL539B is an OBD2 scanner that not only offers basic features like CEL, I/M readiness, and O2 sensor test but also lets you test the car’s battery.
The scanner comes with a built-in multimeter and a battery tester with which you can check voltage and perform a circuit test.
It’s an ideal scanner for beginners and DIYers as it’s very to use thanks to the one-click I/M readiness option that lets you check the readiness status of different monitors.
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Autel AL539B Detailed Review
Autel Autolink AL539B is suitable for people who drive more often or in rough conditions. These circumstances have a drastic effect on the car’s battery and other components.
The battery may weaken over time and stop working properly. This can cause problems with the ignition system as well, making it difficult to start the car. This scanner can help you identify problems with the battery to ensure your car works smoothly.
While this is the scanner’s biggest strength, it offers a bunch of other amazing features as well.
Let’s get to know more.
Read And Clear CEL:
Engine light trouble codes are the most common trouble codes. The light won’t go off unless the issue is fixed. Autel AL539B not only helps to read these codes but also erase them by pinpointing the issue and helping you fix it.
This feature can help save money by letting you fix small faults by yourself and save trips to the mechanic.
The scanner reads check engine light codes accurately and offers an explanation for the code displayed on the screen. This is an excellent feature as it lets you determine minor faults in your car without having to look for explanations.
Live PCM Data Stream:
It supports live PCM data stream that lets you compare different parameters to idetify abnormal values. This information can help you determine where the problem is.
This is a valuable feature that lets you take screenshots when an error occurs. You can share these screenshots with others to find more information about an error.
You can perform various emission-related tests such as I/M readiness test, o2 sensor test, and onboard monitor test.
This test determines fuel efficiency to help you understand vehicle performance. It checks the oxygen present in the exhaust to help you determine the overall status of your car.
Extra Testing Functions
If you own a vehicle that has a 12V battery then Autel AL539B will let you perform load-free tests on it. The scanner comes with two probes, the red probe is connected to the positive terminal and the black probe is connected to the negative terminal of the battery, with the other ends connected to the scanner.
The rest is a super easy process as the instructions flash on the scanner’s screen.
The normal battery temperature is 12.6 volts. If the battery tester shows a voltage of 12.6 then your battery is good. Anything between 12.6 and 12.2 indicates a half charged the battery.
If the scanner shows a number below 12.6 then it means the battery has discharged.
Autel AL539B has a pre-equipped AVO meter that can test voltage in components.
All you have to do is place the probe on the component/circuit and note the current.
It can measure the flow of current between 20A to 200 A. However, make sure to use only a 3.7 lithium battery to power the AVO meter. Using a different battery may cause the scanner to get damaged.
This scanner can help you check the voltage in both AC and DC.
This test can help you determine the alternator output from – no load to when you add loads. It displays low, normal, and high output ripple results on the screen.
- Voltage result is shown in the form of waves and is easy to comprehend.
- There’s no connection dropout.
- Supports all 10 OBD2 modes.
- There’s a built-in speaker in the scanner.
- Data is recorded/playback and can be printed via PC.
- The cord is pretty long and the unit is light in weight hence easy to handle.
- Not very good at performance when used on German cars.
- Lack of advanced features.
Who Should Buy It?
Autel AL539B works with all 1996 and newer vehicles that are OBD2 compliant. Car owners and DIYers who want to check their battery voltage more often can get Autel AL539B scanner. This OBD2 Scan Tool helps determine minor faults as well.
Autel AL539B vs. Autel AL539 vs. Autel AL519 Comparison Chart
4.4 / 5
4.1 / 5
4.5 / 5
|Weight||4.15 pounds||2.5 pounds||2 pounds|
|Full OBD2 Functions||✔||✔||✔|
|Live Data, Freeze frame||✔||✔||✔|
|DTC Lookup Library||✔||✔||✔|
|Starter Test and Charging Test||✔||✔||✖|
|In-Build Battery Tester||✔||✖||✖|
|ABS, SRS Codes||✖||✖||✖|
Autel Auto Link AL539B can be a very good choice for users who want to perform battery tests. It’s quite easy to use and also works very fast.
• What is the difference between the models AL539B and AL539?
Both scanners are nearly identical with one huge difference. AL539B offers a battery test while AL539 doesn’t.
• Is there any use for the volt/ohm graphing? Whats the screen time frame?
The volt/ohm/ampere function is quite handy. This OBD2 scanner lets you measure AC voltage and display frequency and duty cycle on the screen. Moreover, you can also look at the oxygen sensor output signal through the OBD connection.
• Can you test a reductive heater circuit? Can you turn a circuit on and off?
It will help test a heater circuit, however, it won’t turn a circuit on and off because it’s not a scan tool.
• Does the scanner show live data?
Yes, the scanner shows PCM data stream, o2 sensor test value, and freeze frame data as well.
A video about Autel AL539B review: