How to Operate Autel MaxiScan MS309 OBD2-EOBD Car Diagnostic Scanner

Autel MaxiScan MS309 Operating User Manual

With the Autel MaxiScan MS309 OBD2-EOBD Car Diagnostic Scanner, you can find out how fast and easy it is to diagnose your car. Any car enthusiast needs to have this small but strong tool in their toolbox because it makes diagnosing a wide range of vehicle problems easy. The MS309 is made to work with a lot of different cars, so anyone can use it to diagnose problems with their car, from professional techs to regular drivers. The Autel MaxiScan MS309 is going to change the way you maintain and fix your cars because it is easy to use and has a lot of features.

DTC Codes

Autel MaxiScan MS309 Scanner Description

1. OBD II CONNECTOR: Connects the code reader to the vehicle’s Data Link Connector (DLC).
2. LCD DISPLAY: Indicates test results.
3.  ENTER/EXIT BUTTON: Confirms a selection (or action) from a menu list, or returns to the previous menu.
4. SCROLL BUTTON: Scrolls through menu items. It is also used to enter the system setup menu when pressed.

Specifications of Autel MS309 Scanner

1. Display: Backlit, 128 x 64 pixel display
2. Operating Temperature: 0 to 60°C (32 to 140 F°)
3. Storage Temperature: -20 to 70°C (-4 to 158 F°)
4. Power: 8 to 18 Volts provided via vehicle battery
5. Dimensions:
   1. Length
      110.3 mm (4.34”)
   2. Width
      69.5 mm (2.74”)
   3. Height
      20.2 mm (0.80”)
6. 0.18Kg (0.39lb), GW: 0.21Kg (0.46lb)

In the Box when You purchase

1) User’s Manual — Instructions on tool operations
2) OBD2 cable — Provides power to tool and communicates between tool and vehicle.

Autel MS309 Scanner Setup

The code reader allows you to make the following adjustments and settings:

• Language: Select the desired language.
• Unit of measure: Sets the unit of measure to English or Metric.
• Contrast adjustment: Adjusts the contrast of the LCD. The Settings of the unit will remain until the change to the existing settings is made.

To enter the setup menu
From the second startup screen, press the SCROLL button to enter the System Setup menu. Follow the instructions to make adjustments and settings as described in the following setup options.

The number “x/x” to the upper right corner of the screen indicates total number of items under the menu and sequence of currently selected item.

Language Setup

• English is the default language.
  1. From System Setup menu, use SCROLL button to selectLanguage, and press ENTER/EXIT button.
     
  2. Use SCROLL button to select the desired language and press ENTER/EXIT button to save your selection and return to the previous menu.

Unit of Measurement 

• Metric is the default measurement unit.
  • From System Setup menu, use the SCROLL button to select Unit of Measure and press the ENTER/EXIT button.
    
  • From Unit of Measure menu, use SCROLL button to select the desired unit of measurement.
    
  • Press ENTER/EXIT button to save your selection and return to previous menu.

Contrast Adjustment

• From System Setup menu, use SCROLL button to select Contrast, and press ENTER/EXIT button.
  
• From Contrast menu, use SCROLL button to adjust contrast.
• Press ENTER/EXIT button to save your settings and return to previous menu.

How to Use the Autel MaxiScan MS309

Simple steps are needed to use the Autel MaxiScan MS309. Here is a step-by-step plan to help you begin:

1. Locate Your Vehicle’s OBD2 Port:
   • The OBD2 port is usually found under the dashboard, near the steering wheel, but its location can vary depending on the vehicle model. Look for a 16-pin connector that matches the MS309’s plug.
2. Plug in the MS309 Scanner:
   • With the vehicle’s engine off, plug the MS309 scanner into the OBD2 port.
3. Start Your Vehicle:
   • Turn the ignition key to the “On” position, or start the engine, depending on the requirement of your vehicle for running diagnostics.
4. Operate the MS309 Scanner:
   • The MS309 should power on automatically once the engine is on.
   • Navigate the menu using the buttons on the device. You can typically choose to read codes, erase codes, and view freeze frame data, among other functions.
5. Read the Diagnostic Trouble Codes (DTCs):
   • If your vehicle has any issues, the scanner will display corresponding DTCs on its screen. The MS309 provides generic codes (applicable to all manufacturers) and some manufacturer-specific codes.
6. Interpret the Codes:
   • The scanner typically shows a code along with a brief description. For a more in-depth understanding, you may need to refer to a code manual or an online database.
7. Erase the Codes (if applicable):
   • After fixing the issues indicated by the trouble codes, you can use the MS309 to erase them. Note that merely erasing the codes without addressing the problems will likely result in the codes returning.
8. Turn Off the Scanner and Unplug:
   • Once you’re done, turn off the engine, disconnect the scanner, and safely store it.

Tips for Effective Use:

• Vehicle’s Engine:
  • Check whether your vehicle needs to be running or just in the “On” position for diagnostics.
• Code Interpretation:
  • Some codes may be vague or require professional interpretation. Consult a mechanic if unsure.
• Regular Checks:
  • Use the MS309 regularly to catch potential issues early.
• Battery Drain:
  • Avoid leaving the scanner plugged in for extended periods to prevent battery drain.

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