Linear Solenoid Valve Calibration FAIL

So you replaced the used accumulator that drove over to the dealership just fine without any lights on or anything and the dealer tells you that you needed a new accumulator pump assembly or whatever and it would be $2,200 and you ran out and brought a new one wow that's interesting. I don't think I would have gone that route with no lights on in the brakes working fine My accumulator's bad yeah okay. That almost seems nonsensical but cool and so then after the new however many dollars the new part was you still have the same thing which makes sense the dealer was wrong obviously. And I don't know where this linear sensor is I'll have to go look on the parts diagram like everybody else I see nobody's quick to say where it is.

 

The linear solenoid valve calibration is one of the steps the repair manual says to perform after replacing an accumulator (at least in the Gen 2). There are also Gen 2s that get a linear solenoid valve calibration forgotten code, (like a 2008 I currently own) and if the calibration procedure will not work, the troubleshooting guide states that accumulator replacement is required.

So, he replaced a failed accumulator with a used one and wasn't able to complete the calibration successfully. Apparently, the dealer wasn't able to complete it either, which is likely why they said it needed a new accumulator. I'm sure he had codes and alarm lights. He didn't drive it to the dealer with no warning lights. I read through a lot of postings about this code and there were a few things mentioned that can throw it off, like parking brake position. I don't recall everything exactly. So far, I've just lived with driving the car the way it is. The only problem I've experienced is the brakes are a bit grabby below 5-10mph. I just haven't had the time to swap it out.

 

If it's a Gen 3, it has two linear solenoid valves, SLA and SLR. They are both internal to the brake actuator.

 

Well kick Azz. So he's been through two break actuators one he bought on eBay that I guess was working fine and had no lights and then as you see in the text the dealer told him it was bad and he needed to do something and I guess went out and bought I don't know brand new aftermarket supplied have no clue and I guess in both of those he couldn't set this sensor

 

The linear solenoids are valves. Some solenoid valves are built to just be open or closed, but linear ones are made so you can modulate the electric current to the valve, and that modulates how open the valve is.

When the ECU is going through its linear solenoid learning procedure, it is sending different amounts of current to the valves, making different rates of brake pressure change (you can hear this, while the procedure is running), observing the result on the pressure sensors, and learning what electric currents it should use in the future to make what pressure change rates.

 

2 actuator accumulators where changed. First one was from eBay and the second one from Olathe Toyota.
The lineir valve offset didn't take with the first one or the second brand new one.

 

Tried the learning again. Just like before it didn't take. The instructions say that the lights should stop flashing and when completed flash again. We've never seen that happen and we've waited quite a while after the screen counted down. Has anyone seen the process finish? I'm wondering if the instructions are just wrong a little bit. Even after the countdown the pump does a few more cycles so maybe (I hope) we're doing something wrong.

 

So now are there brake lights ABS traction control lights any lights on on the dash constantly or flashing or what's happening I'm just trying to get an idea what's going to go on because I'm sure my Gen 3 will fail at some point and I want to know kind of what to expect I know about the park business Toyota only new I bought one from JDM imports in New Jersey they're like 150 bucks and they have plenty so I'm going to guess the eBay one may have not have been bad.

 

I replaced this in my Gen 2 and didn't do any calibration then bled the brakes without tech stream . All works perfectly no lights nothing.

 

Iirc the brake, traction control, and slip warning lights go solid on when the pump fails. Plus the brakes revert to old school hydraulic and the regen no longer works. I have a 14' gen 3 and wonder when it's my turn though I have much lower mileage than my brother.

 

But now you have none of those lights or something's flashing because of this recalibration you can't do or it won't complete. Or it gives you a code for this and a check engine light or ABS code or something like that?

 

What was changed exactly? "Actuator accumulator" isn't a thing in Gen 3. They are separate: the actuator is the upper thing here, the accumulator is the lower thing. Which was changed?

The linear solenoids are in the actuator—the upper thing.

 

The freaking names change across the different models. We changed the lower thing pump and the nitrogen filled canister. I'm pretty sure the microfiche from Olathe called it actuator accumulator (pump and nitrogen filled tank). I think there's a thread or two on here talking about the naming conventions. It doesn't help these threads.

 

Three solid lights, slippery road, BRAKE, and the one that looks like a tire with clamping brake shoes around it.
During the learning process they are a little different and it's described in tech stream. Look at the bad screen picture I took. We have never seen the lights blink signaling it's done