Technical ABS Warning light following discs and pad change

[llebyat]

Hi All, new here so thanks for letting me join.

Just changed the rear disc's and pads on a 2016 panda Cross and now have the ABS, ESC and ELD warnings on the dash.
have plugged in a reader but no fault codes are in the ECU.

Not a novice to changing discs and pads but not used to modern stuff (run classic cars myself) so any help would be appreciated.

Cheers

 

[koalar]

Sorry to hear you are having problems. I know how frustrating it can be

What sort of scanner unit are you using to read the codes. Most of the cheaper ones will only read the engine module and nothing else such as steering, body, ABS

It sounds like a ABS sensor or wiring has got damaged to me

I would start by doing a visual check of the ABS sensor and it’s wiring

You are not the only person this has happened to. I have seen two other similar threads unfortunately they never posted their fixes

 

[llebyat]

Sorry to hear you are having problems. I know how frustrating it can be

What sort of scanner unit are you using to read the codes. Most of the cheaper ones will only read the engine module and nothing else such as steering, body, ABS

It sounds like a ABS sensor or wiring has got damaged to me

I would start by doing a visual check of the ABS sensor and it’s wiring

You are not the only person this has happened to. I have seen two other similar threads unfortunately they never posted their fixes

Thank you for your reply
Am using a OBDII Bluetooth unit and the Torque App on my phone?

I will have a look at the wiring and sensors as you suggest.

 

[koalar]

I have had no luck reading anything other than the engine faults with a cheap Bluetooth dongle

But it does that very well.

To read abs, climate control and so on I have to use a different set of tools

Not seeing any fault I suspect is just the limitation of the obdii dongle you are using

 

[The Panda Nut]

Thank you for your reply
Am using a OBDII Bluetooth unit and the Torque App on my phone?

I will have a look at the wiring and sensors as you suggest.

I had the same with my mothers car. It was a different make. On that once the sensor was disconnected and reconnected ithe ABS light went off after being driven a mile or so. Its notable that the ABS was not working when the light was on and the rear wheels did lock upon little more than moderate braking so do please take care.

 

[llebyat]

I have had no luck reading anything other than the engine faults with a cheap Bluetooth dongle

But it does that very well.

To read abs, climate control and so on I have to use a different set of tools

Not seeing any fault I suspect is just the limitation of the obdii dongle you are using

I have downloaded the 'garage pro' app which reads all codes - but it shows no fault found on the ABS system.
All wiring and sensors appear to be okay, but one thing am thinking - The ABS ring on the end of each half shaft, would you know if there is something like a starting point. The reason i ask is that there were no access holes to get to the calliper pad retainer which needs to be removed to remove a disc, so i ended up undoing the hub on the swing arm so i could move the hub forward enough for access to the bolts. Am thinking that if one of the half shafts jumped a tooth then the ABS ring would be in a different place, which would make no difference unless there was some sort of starting point which effectively lines up with the opposite side. The car would drive fine been a tooth out but it would provide a problem for the sensors - hope that makes sense?

 

[llebyat]

I had the same with my mothers car. It was a different make. On that once the sensor was disconnected and reconnected ithe ABS light went off after being driven a mile or so. Its notable that the ABS was not working when the light was on and the rear wheels did lock upon little more than moderate braking so do please take care.

Hello, have tried that but it made no difference on this occasion, but thanks for you help.

 

[koalar]

I have downloaded the 'garage pro' app which reads all codes - but it shows no fault found on the ABS system.
All wiring and sensors appear to be okay, but one thing am thinking - The ABS ring on the end of each half shaft, would you know if there is something like a starting point. The reason i ask is that there were no access holes to get to the calliper pad retainer which needs to be removed to remove a disc, so i ended up undoing the hub on the swing arm so i could move the hub forward enough for access to the bolts. Am thinking that if one of the half shafts jumped a tooth then the ABS ring would be in a different place, which would make no difference unless there was some sort of starting point which effectively lines up with the opposite side. The car would drive fine been a tooth out but it would provide a problem for the sensors - hope that makes sense?

On other models it makes no difference. Not 100% sure on the 4x4 though but doubt it makes any difference

 

[llebyat]

On other models it makes no difference. Not 100% sure on the 4x4 though but doubt it makes any difference

Okay thank you

 

[Panda IIs]

I have downloaded the 'garage pro' app which reads all codes - but it shows no fault found on the ABS system.
All wiring and sensors appear to be okay, but one thing am thinking - The ABS ring on the end of each half shaft, would you know if there is something like a starting point. The reason i ask is that there were no access holes to get to the calliper pad retainer which needs to be removed to remove a disc, so i ended up undoing the hub on the swing arm so i could move the hub forward enough for access to the bolts. Am thinking that if one of the half shafts jumped a tooth then the ABS ring would be in a different place, which would make no difference unless there was some sort of starting point which effectively lines up with the opposite side. The car would drive fine been a tooth out but it would provide a problem for the sensors - hope that makes sense?

Too late for you now but you don't need to remove the hubs to change rear discs on the Panda 4x4. This is covered on several posts on here.

Regarding syncing the ABS with drive shafts seems extremely unlikely given there's a differential involved between the two wheels. My guess is that there is a connection issue, damaged sensor or the rings on the hub need cleaning. Did you remove the sensors before setting about doing the discs? When I did mine I recall its tough stopping the assembly rotating which could damage the sensor or wiring.

 

[llebyat]

Too late for you now but you don't need to remove the hubs to change rear discs on the Panda 4x4. This is covered on several posts on here.

Regarding syncing the ABS with drive shafts seems extremely unlikely given there's a differential involved between the two wheels. My guess is that there is a connection issue, damaged sensor or the rings on the hub need cleaning. Did you remove the sensors before setting about doing the discs? When I did mine I recall its tough stopping the assembly rotating which could damage the sensor or wiring.

Hi, thanks for your reply and input. No i didn't remove the sensors, so i guess that i will have damaged them. Just hoping i haven't damaged the rings also as i had a real job swinging the hub to one side to get the the calliper bolts (did read about access holes to get to them but the swing my arms don't have any on my car for some reason?)

 

[llebyat]

Hi, thanks for your reply and input. No i didn't remove the sensors, so i guess that i will have damaged them. Just hoping i haven't damaged the rings also as i had a real job swinging the hub to one side to get the the calliper bolts (did read about access holes to get to them but the swing my arms don't have any on my car for some reason?)

Struggling to find sensors atm also, what a mare of a job this is turning out to be lol.

 

[Panda IIs]

Hi, thanks for your reply and input. No i didn't remove the sensors, so i guess that i will have damaged them. Just hoping i haven't damaged the rings also as i had a real job swinging the hub to one side to get the the calliper bolts (did read about access holes to get to them but the swing my arms don't have any on my car for some reason?)

Its not so much a hole as a cut out, here's one description on here; https://www.fiatforum.com/threads/4x4-rear-brake-discs.437398/page-3

I wouldn't assume the worse but if the hubs were allowed to rotate when tightening or loosening stuff then damage to wires or sensor is a risk. Check out connections first. Also the car may need a drive before the fault clears since the (body) computer will only know what it last saw from the sensors.

Good luck

 

[koalar]

Struggling to find sensors atm also, what a mare of a job this is turning out to be lol.

Unfortunately that does happen sometimes

It’s not a problem just another hurdle that needs to be jumped before crossing the finishing line

If your diagnostics was able to interface to the the ABS module it would more than likely tell you where the problem lies

Do you own a multi meter. If so you can do a rough check of the ABS sensor