2002 Z06, 85k miles.

I had been getting the C1267 RR inlet solenoid malfunction code for as long as I have had the car. 99% of the time the ABS and TC light would come on the dash as soon as I started up the car. No ABS/TC but otherwise the brakes worked well. I finally decided to do some troubleshooting earlier this week.

First, I pulled off the EBCM and inspected the electrical connections. Not bad. I cleaned them up a little anyway. I had already cleaned the grounds a few months back.

I looked at the ABS module and several of the solenoids had some surface rust on them so I sprayed them with some PB blaster then cleaned them off real well with some electrical cleaner. Since the ABS module had rust I pulled apart the EBCM to inspect. Everything looked good physically there so I put it back together.

Now the ABS and TC light do not come on when I first start up the car EVER. It will come on after the first medium duty brake with the same code - C1267. The car will also pull to the drivers side when I brake - this is new.

My first thought was that I had loosened up the solenoid but now it is stuck in a different position so I pulled off the EBCM and they all seem to be in the same position. Next, I took the car for a drive WITH THE EBCM DISCONNECTED. I figured with the ABS controls out of the picture it should at least brake straight. Nope. It still pulls to the left.

I put everything back together and took it for a couple more rides and clearing the codes. No changes. The last thing I did was bleed the rear brakes on both corners. I would have though that if a solenoid was stuck closed the fluid would have trouble escaping but it bled normally. After bleeding I took it for a drive and...

...Pull to the left followed by C1267.

Any thoughts?

 

I just bled the front brakes, too. It turns out the passenger front line is completely blocked. That explains why it is pulling even with the EBCM removed. Still, all of the solenoids appear to be returned to their NO position. I am going to try to find one of those brake bleeders that push the fluid from the caliper side to loosen up whatever is blocking the fluid.

 

I'm sure you've checked, to make sure you just don't have a bad bleeder....right? Do the pistons in the caliper extend and retract normally?

 

Nope. I had my girlfriend pushing on the brakes and I could just spin the wheel with ~0 resistance. There is no movement in the caliper.

 

Ok. The chances of a line being "blocked" are remote. Pull the wheel, and attempt a bleed at the caliper. That will tell you immediately, if fluid is flowing.

 

I have done as you suggested and pulled the flexible line off the caliper. With my girlfriend pumping the brakes not a drop of fluid came out.

I will agree with you that the chance are remote but it is looking like that is my problem. I am just hoping it is debris that I can flush out and not something broken inside the BPMV.

 

That's not what I suggested....

Hope you find the problem.

 

What did you suggest, then? It reads like you were suggesting to bleed conventionally; i.e. through the bleeder. Since I already wrote that I did that I figured you must have meant to make sure the fluid is flowing to the caliper.

 

I have replaced the BPMV and braking is restored to all four wheels. Unfortunately my EBCM still needs to be replaced. This system seems to be almost identical to one found in certain Audis. I wonder if they are having as many issues as us.