Vauxhall Meriva towed to workshop after it wouldnt start on customers drive.
Plugged into sykes handheld scanner entered correct engine code but came up with ecu mismatch, allowed me to check fault codes and none present. Would only show battery voltage in live data.
Thinking it was a problem with the scanner I plugged it into opcom only to find it wouldnt talk to it at all!
Changed crank sensor as it seemed a good place to start but has not made any difference.
Checked for spark and there is one! However there is no fuel. Checked fuel pump and is working, Bridged relay and pump works. Checked switch wire from ecu to relay and ecu is not switching relay. If I disconnect ecu multiplug and use power probe to earth switched wire the relay works and switches pump. Vehicle doesnt start as im assuming the ecu won't fire injectors without the signal from the fuel pump relay switch wire.
I am suspecting a faulty ecu, checked fuses and ecu seems to have a good earth.
Immobiliser possibly? Not sure if immobiliser cuts the spark too? Management light stays on when ignition is left on.
Am I missing something? Help!!