Nissan Repair Questions? Ask a Mechanic for Answers ASAP
Ok, check for power on the red wires on the coils and for continuity to ground on the black wires. Let me know!
A bad crank sensor could cause a no spark issue, I would start with that, check for voltage at the crank sensor. I do not believe your p1564 is related to the no start issue.
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You should see battery voltage on the red wire to the crank sensor
here is a wiring diagram for the coils, do you have injector pulse when cranking?
have you checked all those fuses and relays in the diagram? have you checked for voltage at the coils?
Usually if it is a security or key issue, the engine will not crank at all.
check the black wire on the coil for ground. probe the red wire and ground the test light to the black wire, does it light up?
Yes it could be, but you want to make sure the harness and all the grounds are good first.
Has the car been in an accident? any other work done on it?
the third wire is the triggering circuit, you need an oscilliscope to see the wave form, a test light or volt meter will not pick it up.
unless your multimeter can read hz frequency
if you already replaced the crank sensor, and all the coils are not getting the triggering signal then its the ecm. if it were just one or two I would say wiring harness.
You could also hook up scan tool and go into live data, verify in the scan tool you have an rpm signal.
That will tell you if the crank sensor is sending a signal to the ecu.
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Yes those aftermarket cam sensors are not the best.
Sorry to hear that. You really need a scope to check to see if the ecm has a triggering signal to the coils.
If your cam and crank sensors are out of correlation, the engine will not start.
By unplugging the sensor the computer resorts to base timing values.
I would probably do a compression test on the motor. If it jumped time it may have bent valves.