Hello all,
I had a 2006, 407 2.0 hdi, RHR engine code, SID803 system, dropped off last night after it cut out.
I have it running again. Two bad fuses, one of which fell apart as I extracted it, ( fuse 10 Engine management actuators, and one VERY dirty ( fuse 1 Engine management control unit ), both located in under bonnet fuse box.
The issue I have is, confusion at the crank position sensor signal and the designation of terminal values/numbers.
ESI states, wiring harness connector terminal 1 positive, terminal 2 signal and terminal 3 negative.
This vehicle has terminal 1 negative, terminal 2 signal and terminal 3 positive.
Terminal one being at the top when sensor fitted to vehicle.
Okay, this may simply be Bosch transposing the terminal numbers !!
I have 5.05 volts at terminal 3.
This is a active sensor so did not do a resistance check, although ESI tells me to !!!
I scoped the sensor after the fix, as this was the most prevalent code, ( P0337 Crankshaft position sensor short to + / ground or open circuit ) and expected to see a 5 volt square wave signal BUT I have a 11.5 volt square wave signal.
How? And Why do I have this?
I understood ( I thought ) that I should get a 5 volt signal as it is a 5 volt sensor, or am I being thick here, misunderstanding what I’ve been taught, is something else wrong that I have not yet sorted Or do / can these sensors actually give a nominal 12 volt signal???
Waveform shown...