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

[RDM1]

Have a nice weekend

 

[RDM1]

Alright so i went and did your first part and did something more to it: i went ahead cleared the DTCs on all systems the only thing that came out new is the c1001 on the EPS no canbus DTC or anything else i cleared everything (ECU faults that are the RPM sensor and motorized throttle stop learn and the 9022 on the BCM) went ahead and cranked the car 5 times checked again for fault codes got no canbus errors (no idea why) EPS fault didn't show up and the same faults on the ECU and BCM. This time i cleared them and monitored the CPS and battery voltage, the ECU is reading and giving the engine RPM but the dashboard is not returning any RPM feedback twice.so what i wanna ask isn't the BCM responsible for the dashboard RPM? Is it possible that he's the one causing the ECU intermittent RPM fault although the sensor is being read properly by the ECU?

 

[RDM1]

This is the plugs of the radio and the radio front and back

 

[RDM1]

Ok as for the can bus you asked for testing they all returned an exactly 0 ohms

 

[koalar]

With the ABS still disconnected

Clear the codes

Crank the engine a few times

Read the codes, you will probably get some network errors as we have broken the daisy chain


Off the internet most of day

We can test the wiring for the CANBUS at the diagnostic port

View attachment 443134
Battery disconnected

Resistance between both pins
Resistance between each pin and ground
Resistance between each pin and power



The third party radio does it go off with the ignition
Does bit have a canbus adaptor fitted

All 0 ohms isn't possible unless I have told you wrong

Or we are on the wrong pins is going to be hard for me to check anything untill I get back

 

[RDM1]

All 0 ohms isn't possible unless I have told you wrong

Or we are on the wrong pins is going to be hard for me to check anything untill I get back

Sure no worries but you forgot to mention abs connected or disconnected? Because i plugged it back in and measured with the battery completely removed

 

[RDM1]

And as for the radio it does indeed turn on when i plugged it and opened ignition

 

[RDM1]

Oh and forgot that the radio is related to the canbus and while measuring it was disconnected

 

[koalar]

Anything on the CANBUS will stop the dash, as well as low battery voltage

However we are reading o ohms at the OBD even with things disconnect this is not right

We should be able to check the CANBUS via the mini elm327 adaptor

 

[RDM1]

Uhmmm and if the radio is disconnected does it cause 0 ohms?

 

[RDM1]

Alright so did some digging and that's what i found out something is really not normal in the can system.
These are the photos of what i got upon attempting to connect to the can loop

 

[koalar]

And what readings are you getting

 

[RDM1]

I'll check the voltage tomorrow morning but the immediate can low and high together gave me 0 ohms I'll try and wait for a few as this guy did tomorrow as well and see what i get

 

[koalar]

0 ohms is not correct even with the Abs And radio disconnect

The system does have to be asleep

It easier just to disconnect the battery negative while measuring

 

[RDM1]

0 ohms is not correct even with the Abs And radio disconnect

The system does have to be asleep

It easier just to disconnect the battery negative while measuring

I disconnected the battery fully as it was removed from the car but i didn't wait as long as the guy did in the video I'll make sure to wait longer and to test the voltage as he did too

 

[RDM1]

Hello there after double checking and using another multimeter turned out the can is broken somewhere as i am getting open on the multimeter as if i didn't plug it at all and the 12v socket got the right power on it (battery voltage)

 

[RDM1]

But now the question how to know which wires are the can wires in the modules?

 

[koalar]

Hello there after double checking and using another multimeter turned out the can is broken somewhere as i am getting open on the multimeter as if i didn't plug it at all and the 12v socket got the right power on it (battery voltage)

Just checking

Pin 14 to pin 6

Resistance is still 0 ohms

With the battery disconnected

 

[koalar]

The wires are black and pink
White and pink

 

[RDM1]

Just checking

Pin 14 to pin 6

Resistance is still 0 ohms

With the battery disconnected

It's not 0 ohms it's open 0L