C1202, C1252, C1256, and more

Hi ,

If you go to your 2009 Repair Manual on techinfo.toyota.com (according to @Elektroingenieur, there may also be a way to gain access through your local library; you can search for posts on that), I believe (though I don't have them in front of me) you'll find all those codes in the brake section.

What you'll find is, toward the front of the section, a table listing all the codes together, and for each code there's a page number (or a blue "INFO" hyperlink button) to a separate page that just talks about that code and how to proceed.

Often those sections for each code will have several pages of troubleshooting steps you can follow to find out what exactly caused that code. For starters, though, just look for something on each code's first page, called the "detection condition". That's what tells you exactly what the computer must have noticed, for it to post that code.

The detection condition is different from the short title/fortune cookie phrase that's shown up at the top of the page for the code. Those things aren't as useful as they look. If there were a code C1234 FLUX CAPACITOR, it would be a mistake to think that means you need a new flux capacitor. The key really is to look up the detection condition for the code, then figure out why that condition was detected, and that might or might not turn out to point to the flux capacitor per se.

Where this advice can really help is in a situation (like yours) where there are several codes. If you just look up the codes' fortune cookies, you might end up thinking you have some incoherent mishmash of arrows pointing different directions. If, however, you look up the several codes' detection conditions, and then think about why those conditions might have been detected together, you will often find they tell a pretty tight story.

-Chap

 

Welcome to PriusChat!!

How did you retrieve the codes posted above?

 

Anyboby have the pages of troubleshooting steps for c1253?

 

Here is the workup for c1252 and c1253:

https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/21avn/cic12525.pdf

Please report back on how you fixed your thrown DTC

 

Thank you very much, but mi Prius is 2010. I cant find the abs relay. My car have the light on ( abs, brake, vcs, exclamation point) and a beep. The brake pedal is like solid rock. The abs fuses are good.

 

Oh, my bad.

Your profile lists a 2004 (gen2), and you were posting under a gen2 forum 'Gen 2 Prius Care, Maintenance and Troubleshooting.'

You might try reposting your request in a Gen3 sub.

 

Right!! Today I downloaded the prius 2010 manual. Thanks you!!