Warning: To avoid personal injury, this test may be used only when the battery is fully charged and a battery charger is connected. Otherwise the engine may start at any time.
- Stop the vehicle and turn the engine off.
- Connect the compression gauge to the engine.
- Turn the ignition on.
- Activate the test to disable combustion.
- Turn the ignition key to the crank position.
- Measured values are displayed on the compression gauge.