Technical '06 Panda crank sensor issue.....

[koalar]

They all seem to match except two

Pin 3 isn't fully in any photo only the white side not the green if this is correct I Would assume the pink and white is correct just misprinted

 

[RDM1]

It's possible that due to the age it is looking more grey than white i don't know. Anyway i looked a lot and all manufacturers use the exact same obd2 pinout but the question is where is the first destination of these 2 can wires? Because they're not reaching the ECU

 

[koalar]

Probably here is a good first check, pin 11 and 20

 

[RDM1]

Alright gonna pull out the BCM for a start

 

[koalar]

Can you not see the white/pink and black pink on connector H, I know it's a bit tight in there

You radio, the original was CANBUS operated if you follow the wires back can you see where a box plugged into the wiring loom, or a wire spliced in, either a can adaptor is fitted or an ignition supplier cable tapped into to operate with the ignition

Plug the ABS back in and disconnect the dualogic does the car crank

Can you now connect to the canbus via diagnostic software

 

[RDM1]

Sorry mate removed the BCM and here's how it looks gonna check if the obd2 can bus are getting where you mentioned first

 

[RDM1]

These are the wires on pin 11 and 20

 

[koalar]

That looks correct

What's the resistance between pins 11 and 20 at the BCM

 

[RDM1]

It's giving me OL

 

[RDM1]

Want me to close the circuit with a wire on the obd2 and test it again?

 

[koalar]

Want me to close the circuit with a wire on the obd2 and test it again?

Nope

We need some to check thier car,

Resistance between pin 14 and 6 on the obdii port, battery negative

My car's not here

@irc
@MrMagoo
@A3jeroen

Anyone

 

[RDM1]

I did check it it was also OL

 

[RDM1]

Did this little trick and measured on the obd2 connector i got 0 ohms perfect continuity. Is it possible now that there is a canbus internal fault in the BCM?

 

[koalar]

Did this little trick and measured on the obd2 connector i got 0 ohms perfect continuity. Is it possible now that there is a canbus internal fault in the BCM?

The result isn't what I expected, before jumping to conclusions we need to confirm what a working car resistance is first

Fiat is a little different, it uses the BCM as a gateway, unlike most

 

[RDM1]

Alright then waiting here hopefully it's not what i am expecting but I'm already prepared for the worse (which is a new BCM and ECU)

 

[irc]

@koalar I'm in the middle of nowhere with only a Mondeo for company at the moment so can't help for now. Sorry.

 

[RDM1]

One more thing for today:

I tested for voltage on the canbus obd2 plug got no voltage at all between low and high but i plugged only the BCM plug that contained the can nothing else should i plug them all again to get a reading?

And i am promised a professional multimeter tomorrow probably in the afternoon then we will be able to measure 100%

 

[koalar]

Those multimeters are fine for this sort of thing

The Panda has 2 separate networks

This B CANBUS network is in parallel, every node does not have to be plugged in but you do need all the powers and grounds connected

Black/pink and White/pink

I have no specification for testing this network

Had a look at the 500 diagnostic port as I have more information on this, it's completely different


The C CANBUS is serial anything after a disconnect node will also not work

Brown and Green

The ABS should be in the middle with 4 wires

Brown, green wires going to the ECU

Brown, green wires going forwards through other nodes ending at the BCM

Split anywhere green to brown should be 120 ohms

 

[RDM1]

I mean shouldn't i get a voltage reading if i plug the can included plug only? The loop is closed and i should get one

 

[koalar]

Ignition on, dash working, I would expect some communication, activity on the B CANBUS

But that's a guess