Parking on hill: abs fuses blown?

The service manual. In pdf search for "/xx" for any given flash code in the brake control section. /57 is C1256, /42 is C1242, and /45 is C1245.

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I have this now and my code I can't remember what it is it's from the Toyota dealers machine is for low pressure in the left rear part of the brakes my lights just as you describe have been on for 2 years and the brakes have been working like they always did except I have no ABS so I can lock up all four wheels and smoke all four wheel wells on a smart application of the brakes but they work very well just like my Corollas I just don't have any ABS when the car skids or loses traction the traction control light still comes on so everything seems to work I just have no ABS so it's like I'm driving my old Corolla I'm comfortable with that I'm sure you're going to find you have similar as far as I know getting a ABS pump and accumulator that works is problematic good luck

 

You can't go looking up C1xxx codes just any old place, because the C1 range is "manufacturer defined", where the same code can mean whatever a manufacturer wants it to mean, wherever they want to use it.



Even if you find it in a list of "Toyota codes", even the same manufacturer can use the same C1xxx code to mean completely different things in different car models.

If you have a Gen 2 Prius, you have to look up manufacturer-defined codes in a repair manual for a Gen 2 Prius.

C1245 means the car is computing an acceleration g value from the car's speed, comparing that to the acceleration sensor reading, and seeing a difference of more than 0.35 g for at least 60 seconds. Possible causes can be a dodgy yaw/accel sensor, incorrect installation of the same, wiring problem, or that the sensor's zero-point calibration needs to be redone.

C1242 tells you that one of the skid ECU's power terminals (IG1 or IG2), which are supposed to be redundant, received power for at least four seconds while the other one didn't. (There's an INF code with C1242 that will tell you which one had power and which didn't, if you have a scan tool that shows INF codes. If it's 87, there was power at IG2 but not IG1. If it's 88, there was power at IG1 but not IG2.)

 

For each of those codes, there will be a specific troubleshooting section, often with several pages of ideas, in the repair manual.

Toyota Service Information and Where To Find It | PriusChat