Skip to content

Troubleshoots For Using an Autel Scanner OBD2 Code Reader, like AL419, AL519, AL619, ML629, etc.

When you use an OBD2 scanner, like Autel AL301, AL419, AL519, AL619, ML629, MD802, MD808 ... to diagnostic your vehicle, you might have bellow problems. Please check bellow instruction and it might be help.

Trouble one: Vehicle Linking Error?
*A communication error occurs if the scan tool fails to communicate with the vehicles ECU (Engine Control Unit).
You need to do the following to check up:

  1. Verify that the ignition is ON;
  2. Check if the scan tools OBD II connector is securely connected to the vehicles DLC;
  3. Verify that the vehicle is OBDII compliant;
  4. Turn the ignition off and wait for about 10 seconds. Turn the ignition back to on and continue the testing;
  5. Verify the control module is not defective.
OBD2 CABLE
Trouble two: Operating Error?
*If the scan tool freezes, then an exception occurs or the vehicles ECU (Engine Control Unit) is too slow to respond to requests. You need to do the following to reset the tool:
  1. Reset the scan tool;
  2. Turn the ignition off and wait for about 10 seconds;
  3. Turn the ignition back to on and continue the testing.

Trouble three: Scan tool doesn't power up?
*If the scan tool won't power up or operates incorrectly in any other way, you need to do the following to check up:
  1. Check if the scan tools OBD II connector is securely connected to the vehicles DLC;
  2. Check if the DLC pins are bent or broken;
  3. Clean the DLC pins if necessary;
  4. Check vehicle battery to make sure it is still good with at least 8.0 volts.
Previous article 2019 Good Tyre Pressure Sensors to recommend for Winter/Snow Tire Exchange
Next article Six Ways You Could be Killing Your Car!!

Latest Posts

  • User Guide | Autel Software Update
    January 4, 2025

    User Guide | Autel Software Update

    This function allows you to update the scan tool software through a Window-based computer. User would update the scan tool ONLY after you had registered the tool on our website: www.autel.com. Then you could download software, update online, retrieve information and get warranty service.

    Read now
  • maxisys ms906 touch screen
    January 3, 2025

    Autel MS906 - An Exceptional Scanner for General Service Technicians

    When Autel debuted the MaxiSYS MS906 tablet line in 2017, one goal was to provide general service technicians with a tablet lineup with superior vehicle coverage and functionality to meet the diagnostic and service challenges of every vehicle that comes into the store.The MS906 and its sister tools, the MS906BT and MS906TS, did not disappoint, and they soon became the go-to tablets for technicians throughout North America.

    Read now
  • autel j2534
    January 2, 2025

    Basic Information About J2534

    J2534 is a versatile tool that shines in various vehicle diagnostics and reprogramming scenarios. Let's look at some common use cases.

    Diagnostics Reading DTCs: When your car’s check engine light comes on, J2534-enabled diagnostic tools can read the DTCs stored in the ECUs. These codes help pinpoint specific issues affecting the vehicle. Clearing DTCs: Once the issues are fixed, the same tool can clear the DTCs. ECU Reprogramming Updating Software: J2534 tools enable technicians update the software in ECUs. This might include manufacturer-provided updates to boost performance, fix bugs, or address recall issues.

    Read now