Quote:
Originally Posted by TonyS9
If you unplug all the injectors you will see 12V only one 1 pin of the connector, the other side I'm not sure what it will be at because it connected to an open collector output of a power electronic stage in the ECU, it could be at any voltage when its not trying to actuate the injector.
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If it's open collector Tony, it will be in high impedance state so there won't be any voltage on it with the injectors unplugged. Could also be they used MOSFET output stages in which case it will still be high impedance but will switch the injectors quicker with fewer worries about hysteresis.
The +12V will be on the pin with the green wire on the injector plug.