Compression test is used to decide how good the cylinder compression is. The engine is not started for this test. The test results are shown as percentages (0-100%).
Test conditions:
Ignition on, engine off.
Procedure:
Start the function.
Turn on the ignition, the values from the compression test are shown.
Turn off ignition, press "OK".
Wait 6 seconds.
Turn on the ignition, press "OK".
The function is done.
If the function fails, check the test conditions and repair any faults.