Rajan Wilcox
If you want to check your fuel injector values using VCDS (VAG-COM), you'll need a laptop and a VCDS cable. This process can be used for Volkswagen, Audi, Skoda, and Seat cars. First, connect the VCDS cable to the OBD2 port of your car and your laptop. Then, start the engine and open the VCDS software on your laptop. From there, you can select Options and choose USB / TEST / OK / SAVE. Finally, click on Select Control Module / 01-Engine / Meas. Blocks and input the relevant information to view your fuel injector values. It's important to note that you should not run output tests while your car is in motion, and some tests may require additional actions, such as pressing the gas pedal, before they become active.
Checking Fuel Injectors with VCDS
| Characteristics | Values |
|---|---|
| Required tools | VCDS / VAG COM diagnose, a laptop |
| Connection | Connect the VCDS cable to the OBD2 port of your car and to your laptop |
| Engine | Start the engine |
| Software | Click on VCDS software on your laptop |
| Software options | Select "Options" and choose USB / TEST / OK / SAVE |
| Control Module | Click on "Select Control Module / 01-Engine / Meas. Blocks" |
| Fuel Injector Values | Should be between -2.8 mg/Str. and +2.8 mg/Str. |
| Output Test Sequence | Can be run only once per session; to run again, close the controller and re-start the session |
| Fuel Injector Activation | Press and sometimes release the gas pedal |
| Output Tests Function | Only available when the engine is not running |
| Advanced Measuring Values | Displayed during Output Tests in UDS/ODX modules |
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What You'll Learn
Connect the VCDS cable to the OBD2 port and laptop
To check your fuel injectors with VCDS, you will need to connect the VCDS cable to the OBD2 port of your car and to your laptop. Here is a step-by-step guide to doing this:
First, locate the OBD2 port in your car. This is usually found under the dashboard on the driver's side, but it can also be located in the centre console or glove box. Once you have located the OBD2 port, you can connect one end of the VCDS cable to it.
Next, take the other end of the VCDS cable and connect it to your laptop. Make sure the VCDS software is installed on your laptop before proceeding. Once the cable is connected to both the OBD2 port and your laptop, you can start the engine.
With the engine running, open the VCDS software on your laptop. From the software, select “Options” and then choose USB / TEST / OK / SAVE. This will allow the VCDS to communicate with your car's systems.
Now, you can click on the "Select Control Module" option within the VCDS software. From here, you will want to select "01-Engine" and then "Meas. Blocks". This will bring up a field where you can input “013” in the first field below “Group”. This will bring up the fuel injector values for your car.
It is important to note that Fuel Injectors often require additional action before they become active. To activate a Fuel Injector, you may need to press and, in some cases, release the gas pedal. Always refer to your car's Factory Repair Manual for exact details. Additionally, do not use the Output Tests function while the car is in motion, and exercise caution when testing certain systems, such as the ABS brakes, as it can cause individual wheels to lock and unlock.
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Start the engine
To check fuel injectors with VCDS, you must first start the engine. Here are the steps to follow:
Firstly, connect the VCDS cable to the OBD2 port of your car and to your laptop. Once the connections are secure, start the engine. It is recommended that you start the engine from cold and select "log START" to ensure accurate readings. Take the vehicle for a drive, preferably for at least 20 minutes, to bring the engine up to its working temperature. This will allow you to gather data across a range of operating conditions.
After your drive, return to your laptop and open the VCDS software. From here, you can begin to analyse the data. Navigate to the Options menu and select "USB / TEST / OK / SAVE". This will ensure your data is stored for review. Next, click on "Select Control Module". From this menu, you will be able to access specific data related to the engine. Select "01-Engine" to focus on engine-related data.
Within the engine module, you can access Meas. Blocks to view detailed measurements. To see fuel injector values, enter "013" in the first field below "Group". This will display the fuel injector values, which should ideally be between -2.8 mg/Str. and +2.8 mg/Str. You can also access other blocks, such as 001 and 004, to log acceleration data and create graphs for further analysis. Remember, the engine has no way to measure injection quantity, duration, or start of injection, so the figures will represent the engine ECU's instructions to the injectors.
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Open the VCDS software
To begin checking your fuel injectors with VCDS, you must first open the VCDS software on your laptop. This requires connecting the VCDS cable to the OBD2 port of your car and your laptop. Then, start the engine.
Once you have opened the VCDS software, you will need to navigate to the correct menu to begin the fuel injector test. Click on "Options" and select "USB / TEST / OK / SAVE". From here, you can select the "Control Module" option.
In the "Control Module" menu, you will need to select the "Engine" option, which is typically labelled as "01-Engine". This will bring up the menu for engine-related tests and measurements.
Next, you will need to select the "Meas. Blocks" option. This will allow you to access the specific measurements and values related to the engine and fuel system. In the "Meas. Blocks" menu, you will need to enter the specific code for the fuel injector values. Type "013" in the first field below "Group".
After entering the correct code, you will be able to see the fuel injector values. These values should typically be between -2.8 mg/Str and +2.8 mg/Str. Once you have noted these values, you can click "Done" and exit the VCDS software.
It is important to note that most Control Modules will only permit the Output Test Sequence to be run once per session. If you need to run the test again, you may have to manually close the controller and restart the session. Additionally, some tests, including fuel injector tests, may require additional actions, such as pressing or releasing the gas pedal. Always refer to your Factory Repair Manual for specific instructions and safety precautions before conducting any tests.
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Select 'Options' and 'USB/TEST/OK/SAVE'
To begin testing the fuel injectors, you'll need to access the "Measuring Blocks" menu. Here's a step-by-step guide:
- Connect your VCDS interface to the vehicle's diagnostic port and launch the VCDS software.
- From the main menu, navigate to the "Select" option.
- Select "Engine" or the specific system where the fuel injectors are located. Different vehicles may have slightly different menus, so select the option that pertains to the fuel injection system.
- Look for the "Options" menu within the Engine or relevant system menu. This is where you'll find the specific controls for the fuel injectors.
- Within the "Options" menu, you should see multiple options related to the fuel injection system. Navigate to "USB/TEST/OK/SAVE."
- Select "USB" to establish a connection between the VCDS interface and the vehicle's control module. This allows the VCDS to communicate with the vehicle's systems and perform diagnostics.
- Once the connection is established, choose "TEST" to initiate the testing procedure for the fuel injectors. This will start the process of gathering data and performing measurements.
- During the testing process, the VCDS software will provide real-time data and measurements related to the fuel injectors' performance. You can monitor these values to assess the condition and functionality of the injectors.
- If you need to record or save the measured data, select "SAVE." This option allows you to store the test results for future reference or analysis. You can then recall the saved data at any time to review or compare it with subsequent test results.
- After completing the testing and data collection, select "OK" to confirm and exit the testing mode. This will return you to the previous menu or the main menu, depending on your VCDS system and vehicle configuration.
Remember to consult the VCDS user manual or seek guidance from a qualified technician if you have any questions or concerns during the testing process.
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Click 'Select Control Module'
To check the fuel injectors with VCDS, you must first connect the VCDS cable to the OBD2 port of your car and to your laptop. Then, start the engine and click on the VCDS software on your laptop.
Now, you can "Click Select Control Module". This is the third step of the process. Here, you will select "01-Engine / Meas. Blocks". You will then write "013" in the first field below "Group". This is where you will be able to see the fuel injector values. The fuel injection values should be between -2.8 mg/Str. and +2.8 mg/Str.
It is important to note that the Output Tests function is used to test a Control Module's Electrical Outputs and the wiring that connects it to various devices. The sequence in which the outputs become active is controlled by the Control Module, not the Diagnostic Tester. Therefore, you should refer to the Factory Repair Manual for your specific car to know what to expect.
Additionally, most Control Modules will only permit the Output Test Sequence to be run once per session. If you need to run the sequence again, you must manually close the controller and restart the session.
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Frequently asked questions
You will need a VCDS cable and a laptop.
Connect the VCDS cable to the OBD2 port of your car and to your laptop.
Start the engine, open the VCDS software on your laptop, and select "Options" and then "USB / TEST / OK / SAVE".
Click on "Select Control Module", then "01-Engine", then "Meas. Blocks".
Normal fuel injection values are between -2.8 mg/Str. and +2.8 mg/Str.
