How to Perform a Cylinder Deactivation Test (cylinder balance or misfire diagnostics) on an Autel Tablet

The Cylinder Deactivation Test is a useful diagnostic function that allows technicians to disable specific cylinders to analyze engine performance. If you are using an Autel diagnostic tablet, follow these steps to locate and perform this test.

Finding the Cylinder Deactivation Test

On most Autel tablets, the Cylinder Deactivation Test can be found under the following menu paths:

• Step 1: Power on your Autel tablet and connect it to the vehicle via the OBD-II port.
• Step 2: Open the Diagnostics application.
• Step 3: Select the vehicle's make, model, and year.
• Step 4: Navigate to Control Unit or System Selection.
• Step 5: Choose ECM (Engine Control Module).
• Step 6: Look for Active Tests / Special Functions.
• Step 7: Select Cylinder Deactivation Test (may also be labeled as "Cylinder Power Balance" or "Misfire Test" depending on the vehicle manufacturer).

Performing the Test

Once you have accessed the Cylinder Deactivation Test:

• Follow the on-screen instructions.
• Select the specific cylinders you want to deactivate.
• Monitor engine performance and compare results.
• Reactivate all cylinders once testing is complete.

Need Assistance?

If you cannot find the Cylinder Deactivation Test on your Autel device, please ensure your vehicle supports this function. For further assistance, contact us at sales@diagmart.com.