How to Test an Airbag Cover
If you recently replaced your airbag cover, you will need to make sure it is connected correctly before you drive away. A full test by a professional mechanic with the correct test rig is necessary, but there are a few things you can do yourself before you take your car to the shop for testing.
Step 1 - Test the Ignition
Turn the key in the ignition to the "On" position without starting the car. The lights on your dash panel should activate at this. Watch for the airbag light. You can count the the number of times it blinks and compare this to a fault list if you want, but there are more than 35 combinations of possible errors. If the airbag light comes on and stays on, move on to step 2.
Step 2 - Use the Multimeter
The most common reason you would get a fault code for the new airbag or airbag cover would be a sensor plug that isn't connected tightly. To check this, use the ohmmeter on the sensors to test. If this shows a problem, disconnect and reconnect the sensor and try it again.
Step 3 - Use a Test Rig
Only certified mechanics will have access to a test rig. If the lights are still coming on, it could be a bigger issue. Find a mechanic with a test rig and have the vehicle tested for official error codes and go from there.