Codes P1500 and P0322 on my 1999 Audi A4 2.8L, what grounds the injectors? The ECM. If so what grounds it
P1500 Fuel pump relay circuit ,electrical malfunction
P0322 Ign / distributor Engine speed circuit , no signal
The ECM uses gound to open and closed the injector, the ECM is connected to a ground and uses ground connection these are known as power ground they are a significant type of gounds. Which is attatched to the engine block. If there is a no start situation and you have code condition P0322 this is a crank position sensor Audi names this as a engine speed sensor without this signal this will have a no start condition.
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