internal failure at the skid control ECU

89540-47130 - OEM Toyota COMPUTER ASSY, SKID

2004-09 Toyota Prius Skid Control ECU Computer Unit : eBay Motors (item 260566139058 end time Apr-08-10 21:21:48 PDT)

Diagram

http://www.toyotapartszone.com/2005/84-14-1882-toyota-prius-abs-vsc.html

 

Check all the "ABS MAIN" fuses. Then the ABS relays [there are
four, I think -- two for main ECU power and two for the pump
motor]. Make sure your 12V is solid before beginning any of
this, of course.
.
_H*

 

1377 is capacitor malfunction.

This could be a good test vehicle of the braking backup mechanism. Do you still have hydraulic braking capability ?

 

Test the 12V battery before spending any money. You can do this yourself with no tools:

http://priuschat.com/forums/newbie-forum/73400-weird-stuff-happening-mpgs-dropping-test-battery.html

 

2005 Prius 69,000 miles. Red triangle warning light. They say I need a new ECU skid control for $2200.
Anyone able to get toyota to pitch in on the cost or cover under warranty? They say it is out of warranty.

 

What DTC was logged? Any driveability issues or warning lights on besides the master warning light?

 

"multiple trouble codes
hybrid control b2799, u0129, cruise control u0129,abs/vsc/trac c1300,c1310/ emps u0121/ a/c b1421/ immobilizer b21794/ gateway b1200,b1207,b1271. traced found no communication to skid control ecu. recommend replace ecu"

That's what the invoice said. Sounds like ECU needs to be replaced on many of the 2005

 

Thanks for the details, diagnosis seems plausible. If you can DIY maybe you could buy a salvage unit.

 

what is diy?

 

Toyota national asked if I wanted to go to arbitration

 

do-it-yourself

 

diy means.. you can do it by yourself without bringing it to the car repair station..

 

Get in touch with Steve Woodruff at <[email protected]>
He may be able to get you a used one. He could also possibly test yours if you remove it and send it to him. If you can't remove it yourself, you could bring it to your local garage to have it removed, and the replacement installed. Off course, if you are in the bay area, you could bring it to Lucious Garage www.lusciousgarage.com/ they should be much less expensive then the dealer.

 

You are not the only one - I too have experienced this - read my post for further info (search on Skid Control ECU under GII forum)

 

Hi

My 2005 T4 prius has got a problem and error codes are C1313 AND C1373 and car will require a new skid control ecu and part number is
T89540-47120
Problem is Toyota Dealer in London are asking 1900£ for this repair though I bought this car in 4500£ 7 months ago. I can not see this part anywhere on internet available either new or used. Can I get some help please.​

 

Unfortunately installing other skid unit dint work, toyota gemca asked me that MAY be skid unit ecu I provided was not functioning alright as they dont have any way to check whether its working or not. Then they said.. May be its because of some problem in Wires to gear box OR something wrong with Skid unit relay. To figure this out I need to pay cost of 4-5 hours of labor @ 130£ per hour...one more interesting thing,they said Even if they would have used the New part and it dint work, I had to pay 1900£ still. Now they suggested me to try Relay change first, then wiring, then going for a BRAND NEW skid unit. I am really confused and frustrated as I have spent 320£ with No results at all.
I went through other forum and followed the procedure to check battery at Weird stuff happening? MPGs dropping? Test The Battery | PriusChat

and found problem in my battery.
This problem started when I left my car unattended for a month in November to Dec in London and temp was very low. Battery was flat when I returned and I jump started it instead of changing the battery.
Results for battery are
1- Battery 11.9v , IG off
2-Battery 11.3v, IG on
3-Battery 14.1v, IG on, PKB ON.
Any suggestions please?

 

Start by replacing the 12V battery to ensure that all ECUs have a source of reliable power upon start-up. I agree with the suggestion that you should replace the relay next.

You may end up spending much more than 320£ before you are done, as the skid control system is not easy to figure out and the dealer tech will rely upon parts swapping at your expense, to see what works.