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Old 07-23-2015, 03:22 PM   #1
Drives: Yaris 2007, LB, 3 drs
Join Date: Feb 2015
Location: Costa Rica
Posts: 4
Yaris 07, 2dr, lb - P/S problem

Hi everyone!

I own a Yaris 07, 2dr, lb and about 5 months ago started with some problems...

This is what happens:

Suddenly when you start the car (1) the P/S light shows in the panel along with the (2) drivers airbag light, (3) the seatbelt beep does not sound and (4) the steering wheel gets hard.

It's resolved by shutting the car off and starting the car again and everything works perfect.

This problem has never came when driving, just when I start the car. The battery is new and I replaced the EPS ECU too. ECU fuses seem to be ok.

I took it for scan and since the problem didn't happen while been there they couldn't get anything. Is like a ghost ha. It just showed old codes apparently from the can communication. May be that's the issue??

I can drive my car anywhere but I can't stand this thing anymore...

If you have any idea of what's generating this I'll appreciate your help!

Here's the video illustrating all this..

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Old 07-23-2015, 07:37 PM   #2
CTScott's Avatar
Drives: 09 5dr LB, 2x 08 3dr LB
Join Date: Oct 2008
Location: USA, CT
Posts: 13,456
The CAN bus error could be part of it. Do you leave any devices plugged into the diagnostic connector?

Also, are you running the original alternator or a replacement one?
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Old 09-07-2015, 08:30 PM   #3
Drives: Yaris 2007, LB, 3 drs
Join Date: Feb 2015
Location: Costa Rica
Posts: 4
Hi CT, the alternator is original! Today I found this thread.. It's the only one that sounds similar to whats been happening with my car, but with a different car.. I think the ECU and the PS motor assembly are from the same maker: DENSO

Chevi cobalt thread:

I might buy a PS motor and get it installed and hope this solves the issue.. What you think?
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