Question

a no start condition is being diagnosed on a vehicle with electronic fuel injection (efi) and distributorless ignition. technician a says you should only use a dmm (digital multimeter) to check voltage values on pcm (powertrain control module). technician b says you should use a tool to check for spark at one of the spark plugs. who is right?

Answer 1

Technician A is correct. A DMM should be used to check voltage values on the PCM. A spark plug tester should be used to check for spark at one of the spark plugs.