Nissan NV200 brakes wont bleed

[Dee J]

As the title says. My normally very competent garage is having problems with my 2014 NV200 van. Having replaced rear brake cylinders (starting to weep) they can't get the brakes working properly again. Having gone through a couple of sets of brake cylinders, and swapping out the master cylinder for a s/h replacement, it's still the same. Spongy brakes that need pumping, and a slowly sinking pedal. They've vacuum bled and pumped etc to no avail. Does this vehicle have some secret procedure? I can't even clearly identify if the van has a load sensing valve (that might need bleeding) or how brake servo/booster (if fitted) might come into the picture.
New brake master cylinders are rare, expensive, and difficult to get, so fitting a new one just as part of a diagnosis technique would really be a last resort. Help please!

 

[Shedendman]

https://www.nissanforums.com/threads/help-with-brake-bleeding.278160/

Post 11 and 13 might help

 

[Dee J]

https://www.nissanforums.com/threads/help-with-brake-bleeding.278160/

Post 11 and 13 might help

Thanks. Looks like brakes have got really complicated in recent years. I've sent the info onto the garage.

 

[Shedendman]

On my transit mk7 you have to bleed the brake through the software,i know bonkers yeah

 

[Bornfree]

On my transit mk7 you have to bleed the brake through the software,i know bonkers yeah

I had a transit mk7 .it was the first vehicle I owned that had the pedal sink to the floor if you held pressure on it with the engine running.
I never thought it would pass an MOT but it did without a problem.

 

[Craig-SM]

https://www.nissanforums.com/threads/help-with-brake-bleeding.278160/

Post 11 and 13 might help

Sounds the same way as I have to bleed the brakes on the Shogun

 

[Keithmac]

On my transit mk7 you have to bleed the brake through the software,i know bonkers yeah

Same with our Mk2 Kuga, you have to pressure bleed and activate the procedure though diagnostics to run the ABS module.

 

[m_c]

On my transit mk7 you have to bleed the brake through the software,i know bonkers yeah

Only if you get air in the ABS module.
Quite a lot of vehicles with ABS are the same.

Even vehicles that should bleed without the ABS being activated can sometimes get air stuck in them that can only be shifted by triggering the various valves and pump.

It's also worth mentioning that some systems require to be pressure bled, with pressure held around 2bar for the entire process.

 

[willie.macleod]

In a nutshell; disconnect battery and bleed front right, front left, rear right, rear left. Press the brake pedal 10 times before you open the bleed nipple in question. Hope you get it sorted!