What the hay is the power steering power supply??? and why does it cost $1100 to replace?

If the red triangle is on then there are DTC present. Are your local Prius guys dealer techs or just local mechanics? If dealer techs ask them for the DTC codes and post on here.

Yes, it will take a Prius specific scanner to pick up the correct DTC codes. If you can get these codes then the site experts should be able to help you diagnose your problem and give you some recommendations.

 

His 'local Prius guys' may not be a dealership, so may not have an ODBII reader that can get all his Prius Specific codes. Going to a dealer to get those codes almost HAS to cost less than $1100.

 

see techinfo.toyota.com which is a subscription website

 

From previous postings, it happens that the power steering ECU can fail with no DTC set.

A brief summary from the manual:

The troubleshooting procedure for a situation when no DTCs are output but a PS warning is always indicated is specified here. The PS warning remains on when there is an open in the IG circuit that inputs power source voltage to the power steering ECU.

The procedure is:
1 check that the communication bus is OK
2 check that the wire harness is OK
3 check that the power steering ECU is getting 12V supply
4 replace the power steering ECU
5 make sure the warning on MFD is gone

 

The OP states that the red triangle is on. My understanding is that any time you have a red triangle a DTC has to be set to trigger this. Is this not correct?

 

Not correct. The red triangle is the master warning light which calls the driver's attention to the fact that a problem exists. However a DTC will not necessarily be logged.

For example, if you open the driver's door while the car is in R or D, the red triangle will come on but no DTC will be logged.

Or if the engine oil level is low, the red triangle may eventually turn on but again, no DTC will be logged.

If the check engine light is on, or if the hybrid vehicle or traction battery warning icon appears in the MFD, then a DTC will definitely have been logged.

 

This is the second posting from the OP on the same subject.
2007 power steering fail

John (Britprius)

 

Hi Patrick,

I tried the opening of a door in D and I received the Yellow Triangle and a message. The Yellow Triangle is a warning alarm for the Gen III. Is this not the same for the Gen II?

The OP had a red triangle which is a fault alarm for the Gen III. Can you also get red triangle faults with no DTC?

Dwight

 

Hi Dwight, 2G does not have a yellow warning triangle, only red. Yes, it is possible for the 2G red warning triangle to appear without a DTC being logged. I don't own a 3G so I can't comment on how its warning lights should be interpreted.

 

The first site showes where it goes
http://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/50/20un0/x040001.pdf

The second site list's several complaints, associated


2007 Toyota Prius Steering Complaints


The third site gives examples of prices 30$ to 60$

prius power steering ecu in eBay Motors | eBay