T27 Parking Brake after manual release

[Ananiash]

Hi toyota owners,

Im stuck after having epb manual release in my avensis. What happened was, epb did not release some time ago and I had to release it manualy.

It wasn't that bad anyway but since then, when I press the button, I can hear the motor winding but by the sound it makes, I can say it has no resistance, winds the gears like they were not connected to flexishafts and it is skipping a gear in ~1 second cycles. In techstream I can see that positive and negative voltage is applied when pressing and depressing the epb button. Now, I took a look in the trunk of the car where manual release slot is and as far as I remember, that cylindrical piece of metal where you put the hex key and press it inside, it didn't recovered to previous position, it didn't came out. It also does not spin when epb button is pressed. I wonder now if anyone in the forum had the epb module opened and could tell me if there is any chance that manual release shaft has had decoupled the gears when I did the emergency release. In the images from the net I can see that manual release shaft sits at the end of the rotor. Watching a video of renault scenic epb, altough it looks different inside, made me think that decoupled gear/shaft could be my problem.

Thanks for looking.

[Konrad C]

I wonder if the calipers are sticking. Also I had the pads stick to the discs especially after washing the car and not using driving. Same for if rain blows on the disc and car not moved for a few days. I now move the car every so often. I would hate mess with the EPB, so check the condition of the calipers, discs, pads and cables first. 
I tend to say that most EPB faults are external. Once you had checked the everything else, then look at the EPB itself, which is very expensive!

  

[Ananiash]

Hi Konrad,

Calipers are okay as for my best estimeate. I rather blame something related with emergency relase here as problem started imediately after the procedude.

I will fidle with epb emergency flexishaft next to see if it makes the difference. 

Thanks for reply

 

[Ananiash]

After removing the emergency release flexishaft from epb housing and untightening by 1 turn the other going to brake caliper, it eventualy worked. Brakes  got locked, I'm waiting now for laptop to charge and will go ahead with techstream diag. 

[Konrad C]

Before you do any diagnostics, make sure the Battery is charged! Don't operate the EPB too much during testing because you could trigger the overheating warning and the Battery power could drop, causing the EPB to stop working and the car cannot start! I have drained the Battery doing diagnostics before.

Anyway good luck in getting the system to work properly.