E48 ecu not picking up crank sensor reading.

[Steveevs43]

Got an E48 ecu ,if I run a test on spark and injectors ,all works..but it won't recognise crank sensor,tested sensor all working ,I'm using oem crank sensor ,it's all on a vauxhall x20xev motor running original parts ie injection,coilpack,and all the sensors, am baffled now,any help epuld be much appreciated.

[stevieturbo]

has it ever ran ?

Has the ecu been set up correctly for your application ?

[Steveevs43]

Engine was a runner on original wiring and ecu ,bit I've removed all of vehicle loom,and engine loom,to replace with dta and a smaller loom on the car ,ecu was set up for a vauxhall 16v motor .

[stevieturbo]

When you're cranking, what does diagnostic display show ?

do a screen record, or video of it or something

And not all motors are the same, has the crank trigger setup etc been correctly configured/wired for your engine ?

[Steveevs43]

Seems like it's an crank sensor fault, I've had a new one ,so will try it ,diagnostic display isn't showing any cranking action at all,I've a feeling also along with sensor issue,the wiring diagram is wrong for my sensor ,as mine needs a positive feed to work it ,there's no feed on diagram, only a shield and return to ecu .

[katana]

Sounds like the 'new' crank sensor is a Hall device which does need a voltage supply to work. I'd take an additional supply from the DTA fused supply to the crank sensor. These give a very distinctive output signal - a square wave - different to the inductive sensors that are widely used.

[JON-TEC-RALLYE]

dta e48, only accepts 2 or 3 wire VR sensors, nothing hall or optical.

You have to change the sensor.

If it is powered, it should not work for this old ecu

[Steveevs43]

dta e48, only accepts 2 or 3 wire VR sensors, nothing hall or optical.

You have to change the sensor.

If it is powered, it should not work for this old ecu

Hi mine is a 3 wire sensor ,original equipment for the vauxhall x20xev motor in an astra gsi 1998,out of interest what type of sensor would be in these ?

[stevieturbo]

Scope it and see.

Some may have 3 terminals, one is just carrying on the shield. Although more often 3 wires will be hall.

Only way to be sure is to test it

[JON-TEC-RALLYE]

Crank sensor connections
Use twisted pair wire with overall
screen for crank sensor
VR sensor pin outs (magnetic)
Pin 1 to pin 18
Pin 2 to pin 20
Shield to pin 20 at ECU
Vauxhall/Opel/BMW/Volvo/Saab/e
tc. (Bosch & Siemens)
Pin 1 to pin 18
Pin 2 to pin 20
Pin 3 to shield to pin 20 at ECU
Marelli
Ford
Pin 2 to pin 18
Pin 1 to pin 20
Shield to pin 20 at ECU