Brake, Brake System, Slip Indicator, and ABS lights on

While you're away from your scan tool out of town, get the codes using light blinks, and post them here.

 

If you search the forum for something like blink codes jumper tc cg

you should probably find a few posts here and there.

 

call around to auto parts stores for a free scan, maybe there is some air in the system

 

42 on the ABS light is "go look at your ECB light."

45 on the VSC light is "go look at your ECB light."

46 on the ECB ((!)) light is DTC C1246. It can be used to report five different weird things about the reading from the master cylinder pressure sensor.



There are INF codes to tell you which of the five weird things happened: either the voltage supplied to the sensor was out of range for at least a twentieth of a second, or the pressure reading was outside of [0.4V, 4.92V) for at least that long, or you weren't braking and it was outside of (0.2V, 0.88V) for at least 3 seconds, or the reading doesn't make sense compared to the stroke sensor or the wheel cylinder pressure, or the pressure fluctuated weirdly.

But light blinks can't give you the INF codes; you would need a scan tool to get those.

There are five pages of troubleshooting steps in the repair manual that you can follow to pin down the problem.

Toyota Service Information and Where To Find It | PriusChat

edit: hmm, from your profile, I looked in a Gen 3 liftback repair manual and posted a Gen 3 liftback diagram. But I think the c is pretty similar in the brake department. (?)

 

Can you send a link to the webpage that explains how to activate the Tc & GG blinks? I have a 2013 Prius and I'm in the same situation. I still can't find a post on how to activate the blink diagnostics.