After Hybrid Battery Changed Brake+ABS Light Came On

I will send you a pm

 

Some of those codes have to do with electrical power supplied to the brake system, some of it from a box that's located in the rear of the car near the (aux) battery.

If there was recent work done back in that area (as would be involved in replacing the traction battery), I would be tempted to do some careful inspection back there before I totally took the dealer's word that the actuator's shot. Sometimes things get bumped, jostled, left unplugged or half-plugged.

 

Can you throw a link to how you recalibrated it? I'm having a similar issue with my cruise control every since I replaced the 12v battery. It's been 8,000 miles so no actual problems just a code that won't clear even with a computer from the mechanic's.

 

You don't have to guess at this based on "similar issue" or "a code".

There is one specific code that tells you the car wants the linear solenoid offset learned. C1345.

If you have that code, you have to do the linear offset learning. If you "clear" the code, the car will just say "by the way, did I ever mention you need to do the linear offset learning?"

If you have other codes but not that, you should not be thinking about the linear offset learning, but about what the codes you have mean.

It comes down to not "I have codes" but to what codes.

If you do have C1345, this procedure will trigger the relearn in a Gen 3. I don't know if the Gen 2 procedure is the same. A careful person would check the repair manual to be sure.

 

Ok, that's a different procedure. That one's for initializing the yaw rate and deceleration sensor. That's also a thing. If your car has a code for needing the yaw rate and deceleration sensor initialized, you do that thing. If it is giving you the code for needed the linear solenoid offset learnt, you do that thing.

Again, it comes down to paying attention to what codes you have.

 

The ABS actuator is a box with ten valves that are electrically operated, one that's mechanical, an electric pump, a pressure chamber, and seven pressure sensors. "ABS actuator failing" can happen in dozens of different ways, with different symptoms, and that's why there are so many different brake trouble codes that can be reported, and that's why you read the trouble codes to find out what it's reporting.

Now, if you get codes that lead you to a diagnosis that the actuator is in fact failing, there isn't much you can do but replace it; there aren't any sub-assembly-level repair instructions or parts on sale for it.

But you can also get lots of codes that don't mean the actuator is failing. Codes about electrical supply to it, or connections to other sensors, or communication with other ECUs, or just codes that it wants to relearn a certain calibration figure, so you do that.

That's why it's so important to read the codes, and refer to the manual for what they could be telling you, and not just guess. There are near two hundred of them; it doesn't make sense to say "I seem to have some brake codes, what does that mean?"