Piezoelectric Fuel Injectors

WARNING: This page is about a different car, the 2011 Audi Q7, 2010 Audi Q7, and 2009 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

To reduce the risk of personal injury and/or damage to the fuel injection and glow plug system, always observe the following:

Some Piezoelectric systems and control modules have high tension; coming in direct contact with certain components can result in injury.
Individuals with pacemakers should not bend over the engine compartment when the engine is running because the injectors are powered with high voltage.
Fuel lines must not be opened when engine is running.
The ignition must be switched off before connecting or disconnecting the injection and glow plug system wiring or tester cables.
Cleaning the engine should only be performed with ignition switched off.
It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all checks and repairs, check the DTC memory and erase the memory, if necessary.