S85B50

My new project is a s85b50 engine from e60 M5.

ECU is V3 with internal CAN

Engine has can bus controlled throttles

First issue: Primary trigger is VR is not detected (not seen in triggerlog and RPM=0).

Ground point is bolt on the chassis. Strongly tightened.

The 4 cam signals are all ok.

Info provided by email:

* Everything is working except Primary trigger VR signal.

** maybe ECU is configured as primtrig HALL for some reason ? can you measure input DC voltage with 1k resistor between ground and EC36/27 ? >0.5V (1.35V typically for 2k7 internal pullup) likely HALL input. Measuring <270 mV means weak internal pullup (likely VR), perhaps p259 damaged causing VR not sensed ?

* I have a spare Ecu to test the same trigger on the same harness and it sees the primary signal.

* All the 2nd 3rd 4th and 5th signals are seen on the triggerlog but the 1st.

** Double-check grounds just in case, and see [repair/upgrade]

* I have an engine simulator also to test and the same thing happens.

* The spare ecu is OK.

DB review and feedback

* If the ecu was ordered with pri = VR and 4x HALL (for cam triggers) than it should just work out of the box

* Your other testing (with the other ecu and engine simulator) suggests its not a problem with wiring or sensor, this must be some ecu mis-configuration.

I have checked P259 channels 4,5,6,7 making vanos solenoids ticking. They work.

I assume p259 is not dead.

I can also simulate Hall sensor signal with the Jimstim but prim signal still missing.