Berlingo ABS & ESP/ASR Fault - Any Advice?

[PedroGTR101]

Hello

I’m hoping someone has come across this before or better yet has any guidance on what needs done to correct it.

I have an odd problem with my Berlingo Van (Berlingo B9 , 2015, 122000miles)

One day it decided that there are an ABS and ESP/ASR System faults.
Plugged in the OBD reader to see what all the beeping messages was about and came across the following codes…
P0571 – Intersystems CAN. Brake pedal position information sent by the built-in systems interface.
C0040 – Brake Pedal Switch fault: Coherence with the pressure sensor: Coherence.

P0571- Checked operation of brake switch with ODB reader, interestingly they are two detected by the OBD reader Primary and a Secondary – the Primary changes state when pedal is pressed and released, the secondary shows as pressed and doesn’t change its state – quite possibly a duff switch. – yet to confirm if this is normal on a similarly spec’d and age van, which I do have access to. and need to find a moment to visually inspect the switches.

C0040- This could be related to the above fault, but I’m not sure which one is the root cause of the issue. upon inspection of the brake pressure the van reports that there is a constant 30 Bar of pressure on the brakes when idle (not pressed), this increases when the brake pedal is pressed and when released its settles back to 30 Bar. On the other “working” van the pressure sits (when idle) at 0 Bar.

After finding the pressure oddity between the vans, we were suspicious of my vans ABS pump/block which may be at fault.
We handed the van to a Garage to have a look over the issue to confirm - They came to the same conclusion, the garage sent the ABS Pump/Block away to a service centre who repairs, re-conditions and tests them.

However, when the pump returned and was refitted to the van the fault remained. The garage spoke to the pump repairers, they believe the issue is elsewhere in the van as the pump had a clean bill of health. The garage had a go over wiring and earth points to no avail. The Garage then threw in the towel as this was becoming not economical to continue. – fair enough!

With the age and mileage on the van, you would expect things to misbehave. With this issue it will not pass an MOT with ABS faults on the dash, and I feel it’s a shame to condemn it because of it.

So… what do you think?

Cheers

Pedro

[RichardW]

Welcome along, I have moved this into Citroen.

This fault has come up before, but not sure we have ever got to the bottom of it!

[ghostinwires]

Did it say which wheel when you had the diagnostics done. I has a similar issue which was a nightmare to find a trusting garage as all they wanted to do was charge me a fortune for a hub replacemnt. I had a issue with a 308 gtline sw 2016 plate I know they are different vehicles however check the wiring loom from the sensor as it could be damaged or cable corrosion causing the fault on dashboard..that's what mine ended up being.

[GiveMeABreak]

Brake switch - there's a technical bulletin if this fault code (C0040) comes up with the ABS warning light on braking. Recommendation is to replace the brake switch.

These are dual circuit type switches - and used for the braking lights and also the cruise control.

[williemacleod]

I’m hoping someone has come across this before or better yet has any guidance on what needs done to correct it.
P0571- Checked operation of brake switch with ODB reader, interestingly they are two detected by the OBD reader Primary and a Secondary – the Primary changes state when pedal is pressed and released, the secondary shows as pressed and doesn’t change its state – quite possibly a duff switch. – yet to confirm if this is normal on a similarly spec’d and age van, which I do have access to. and need to find a moment to visually inspect the switches.

C0040- This could be related to the above fault, but I’m not sure which one is the root cause of the issue. upon inspection of the brake pressure the van reports that there is a constant 30 Bar of pressure on the brakes when idle (not pressed), this increases when the brake pedal is pressed and when released its settles back to 30 Bar. On the other “working” van the pressure sits (when idle) at 0 Bar.

Hi Pedro, did you ever get anywhere with this fault? I am helping a friend who has exactly the same fault - 30 bar pressure when idle, increases when brakes are pressed, secondary switch showing pressed, ABS pump taken off and sent away for testing coming back with clean bill of health, brake switch already replaced by a garage and now MOT due!

We'd be grateful for any assistance anyone can offer? The only other thing that I see that I would like to check further but don't have wiring diagrams available to me is "electrovalve supply relay status" turns to "faulty" in our diagnostics software when the pedal is pressed. So if anyone has a source for the ABS circuit on a 2018 1.6 diesel berlingo B9 that would be helpful. Thank you.

[williemacleod]

I'm just updating this post for anyone else in the future who may stumble across it. We ended up fitting a secondhand ABS unit from a Partner van of the same year and the issues disappeared straight away.

Having wasted weeks whilst a "specialist" pump repairer who has a very high google ranking "tested" a pump and declared it serviceable leading us on a wild goose chase stripping and testing bits we didn't need I am really disappointed with their lack of response and given that the cost of the their diagnosis/testing/shipping was equal to the cost of a new pump I would advise caution as their are some crooks out there in the pump rebuild world.