Fuel Injectors

TEST PROCEDURE
Activate the Fuel Injectors
In this case, the fuel injector valves are driven with a frequency of 10 Hz. The pulse period is 1 ms. Activation time should be kept as short as possible in order to avoid an excessive amount of fuel being injected. Activation can be felt with the hand. The pulses can be tested with the multimeter at the injector valve connector.

Resistance Test
The resistance of an injector valve must be measured directly at the component. Only the entire injector valve group (e.g. 3 valves on 6-cylinder engine) can be measured from the DME control unit connector. See Fuel Injection.