RB25 No RPM Signal

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Posts: 9
Joined: Tue Nov 01, 2016 7:39 pm

RB25 No RPM Signal

Postby r34gtt » Wed Oct 14, 2020 5:34 pm

Hi all,
Trying to start my R34 Rb25 neo after installing a platinum pro+ Many mechanical upgrades.
It cranks but will not start.
First thing i notice is that in Ecu Manager the RPM counter is reading 0 even while cranking.
I have rechecked the Gap on the crank and cam triggers is 1mm
I have gone to the Diagnostics page and the Trigger counter and miss counter say 0
I have a Ross crank trigger and have selected 24+1 in the Main Setup page.
With the cam sensor unplugged i read 5v at the Power supply, I also read 5v at the signal wire?

Any help would be appreciated.

Posts: 9
Joined: Tue Nov 01, 2016 7:39 pm

Re: RB25 No RPM Signal

Postby r34gtt » Sun Oct 25, 2020 5:06 pm

I back probed the sensors and have the expected voltage (5V) on both sensors.

The signal wire also changes from 5V to 0V when i wave a screwdriver in front of it so it would appear they are working as expected.

I have also back probed signal from the ECU to the sensors and have continuity so all appears good there.

While waving the screwdriver in front of Crank sensor the trigger count did go up to 2, however i cant get it to do it again..

The 'home counter' and 'triggers since last home' boxes are both greyed out'

I also have the crank signal wired to pin 44 (crank signal 1 degree), however pin 45 is also labeled the same on the pinout.

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