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

[koalar]

Not the voltage drop on the big lead

But the voltage on the little lead

Ignition on and ignition off

Smart gearbox looks like d4 has been moved to the back

 

[RDM1]

Had to jack the car again and go under because I couldn't pass my hand from behind the engine and these were the results from the wire above the main one for the cranking and it was 0 when ignition off but when i opened the ignition i got a very bouncy value at first between 840 and 1194 before stabilizing at the picture

 

[RDM1]

So this is definitely wrong and as for the plug next to the fuse box there is nothing on the fender but i have a green one next to the fuse box is this the one?

 

[RDM1]

Is this the one? Turns out black atop the fuse box

 

[koalar]

Is this the one? Turns out black atop the fuse box

Looks to be

Be handy to find out as the starter and alternator go through it

Saves crawling under the car

Should give the same results

 

[RDM1]

If by going under the car i can get a more accurate result then so be it

 

[RDM1]

Had to jack the car again and go under because I couldn't pass my hand from behind the engine and these were the results from the wire above the main one for the cranking and it was 0 when ignition off but when i opened the ignition i got a very bouncy value at first between 840 and 1194 before stabilizing at the picture

What about those?

 

[RDM1]

Doesn't that mean that the issue is with the alternator wiring?

 

[koalar]

Doesn't that mean that the issue is with the alternator wiring?

Nope looks good, same as mine

It's been a few year since I tested mine

I can't remeber if the voltages bounced or not and I don't have the car here to test

 

[RDM1]

Ok then what's the next step?

 

[koalar]

But now come to think of it the U1700 means that there's a lost connection between the BCM and ECU and the grounds are all not related as i understood your shared explanation of the DTC

Just means the BCM it's missed some traffic on the canbus

Could be the gearbox
ABS
ECU
Steering
Radio
Parking sensor if fitted
Climate control if fitted
And so on

Unfortunately it does not tell you which model didn't respond


Usally the abs

 

[RDM1]

Well the gearbox used to disengage sometimes it mess up with the gears dunno if it's a possibility but that's when the car was running not to mention when the car started shutting down while driving i noticed its shifting has became much more smoother

 

[MrMagoo]

Looks like your ECU is the same as my 2009 euro 4. I noticed your diagnostic device displays pre 2007.

 

[koalar]

Most things tested so far are fine
Being intermittent it's not 100% but close enough

The only test the was marginal was the ECU ground

This needs retesting before moving on

From the aluminium case to battery negative while cranking I would expect around 0.1V

 

[koalar]

The relays should be flush

The bottom one in your photo looks to be out by 3 or 4 mm

Looks like someone's been here before by the plier marks

 

[RDM1]

I was the one was testing them to check for a bad one causing the sudden turn off thought it was a failing fuel pump relay or something so i went and checked them all out and they were all functional

 

[RDM1]

Sorry lads for being away it was a busy day but my question is what's next?

 

[koalar]

Post a good photo of inside the fuse box

Do the voltage drop test to the ECU and battery negatative

You said earler there were two earths on the ECU can you post a photo

 

[RDM1]

Tomorrow morning to noon I'll get my sister to get an extra clear photo with her better camera

 

[RDM1]

Hope it's clear