09 Yaris Heater blower problem - Page 2 - Toyota Yaris Forums

motoxxx3 · 10-01-2010, 09:25 AM

Just had a call from the dealer - they have found a bad earth. Apparently it is now fixed!
Let's see if they have!

CTScott · 10-01-2010, 09:40 AM

Quote:

Originally Posted by motoxxx3

Just had a call from the dealer - they have found a bad earth. Apparently it is now fixed!
Let's see if they have!

That sounds plausible. With it happening under load, I would believe that a bad ground could cause that.

motoxxx3 · 10-01-2010, 11:43 AM

Latest update:
They have today fitted an auxillary earth strap from the blower motor to the car.
The reason being that they now think there is a fault with the earth wire in the car's multiplex wiring harness and by doing this is it will prove whether this is the case.
(They have changed every other component in the system)
I have to run the car for a few weeks and see if this has cured the problem.
Everything is checking out o.k. now with the voltage.
If this turns out to be the problem they are going to fit a complete new wiring harness.

motoxxx3 · 10-01-2010, 03:18 PM

Quote:

Originally Posted by CTScott

That sounds plausible. With it happening under load, I would believe that a bad ground could cause that.

Latest update:
They have today fitted an auxillary earth strap from the blower motor to the car.
The reason being that they now think there is a fault with the earth wire in the car's multiplex wiring harness and by doing this is it will prove whether this is the case.
(They have changed every other component in the system)
I have to run the car for a few weeks and see if this has cured the problem.
Everything is checking out o.k. now with the voltage.
If this turns out to be the problem they are going to fit a complete new wiring harness.

motoxxx3 · 10-02-2010, 01:18 PM

The temporary earth strap has not cured the fault. It is doing it as bad as ever - on top of this I noticed a kind of 'plasticy' burning smell when I first started the car this morning.
Iam a very unhappy Toyota customer.
Back to the dealer on Monday - my patience has just about run out

why? · 10-03-2010, 03:15 AM

really sounds like you got the 1 in a million lemon. Sorry to hear about that. Hope they figure it out or replace it.

motoxxx3 · 10-05-2010, 01:17 PM

After taking legal advice my car is back in at Toyota - Iam not happy - 5 attempts to fix it and still have the problem! they have assured me that this time the the car will not be given back to me until this fault is 100% fixed. Watch this space!

pspeezy · 10-05-2010, 05:11 PM

dang thats a bummer to hear, hope everything turns out okay.

motoxxx3 · 10-14-2010, 11:10 AM

Final post.
Toyota have had my car for 4 weeks in total. Changed every component in the system.
It has now transpired that this is an inherent characteristic of the Yaris T2 1.0 model 06-10 without aircon.
Not just my car does this - all of this particular model Yaris' do it - and I have witnessed this now on other cars like mine.
So there we go folks, Toyota don't know what their own cars do, or why they do it, or if it is even actually a fault.
Turns out mine wasn't the 1 in a million lemon after all....just one of a bunch of lemons.
Back to a Honda next time.....probably.

CTScott · 10-14-2010, 11:35 AM

That is really strange, and one reason that I am glad that here in the US we get Japanese made Yaris instead of French made ones.

It basically means that the voltage is significantly sagging, but stepping on the accelerator normally has the opposite effect - It should raise the voltage, as the alternator should have a greater output at higher RPMs.

When you are driving at night, do you notice that your headlights dim when you step on the accelerator?

motoxxx3 · 10-15-2010, 06:45 AM

No the headlights and all dashboard lights do not dim. However the interior lamp does dim in sync with the blower speed slowing down.
The tech told me the ECU sends a signal to boost alternator output when the lights are turned on, but it does not send a signal when the blower is turned on. This explains why the problem does not occur when the lights are turned on.
I have myself now checked a couple of 1.0 T2 Yaris and they do it also.
The 1.0 & 1.33 TR versions WITH aircon do not do it.
I totally agree with your comment about the Japanese built Yaris. They are sure to be better quality. The French built ones we have in Europe have VALEO electronics, which have a bad reputation. The Jap ones probably have Hitachi, Denso or Toshiba electronics.

10-03-2010, 03:15 AM	#24
why? Only Happy When it Rains View User's Garage Drives: Yaris LB Join Date: Jan 2006 Location: harnett county NC Posts: 4,097	really sounds like you got the 1 in a million lemon. Sorry to hear about that. Hope they figure it out or replace it. __________________ Colin Chapman disciple

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10-01-2010, 09:25 AM	#19
motoxxx3 Drives: 2009 YARIS 1.0 VVTi Join Date: Aug 2009 Location: YORK, ENGLAND Posts: 21	Just had a call from the dealer - they have found a bad earth. Apparently it is now fixed! Let's see if they have!

10-01-2010, 11:43 AM	#21
motoxxx3 Drives: 2009 YARIS 1.0 VVTi Join Date: Aug 2009 Location: YORK, ENGLAND Posts: 21	Latest update: They have today fitted an auxillary earth strap from the blower motor to the car. The reason being that they now think there is a fault with the earth wire in the car's multiplex wiring harness and by doing this is it will prove whether this is the case. (They have changed every other component in the system) I have to run the car for a few weeks and see if this has cured the problem. Everything is checking out o.k. now with the voltage. If this turns out to be the problem they are going to fit a complete new wiring harness.

10-02-2010, 01:18 PM	#23
motoxxx3 Drives: 2009 YARIS 1.0 VVTi Join Date: Aug 2009 Location: YORK, ENGLAND Posts: 21	The temporary earth strap has not cured the fault. It is doing it as bad as ever - on top of this I noticed a kind of 'plasticy' burning smell when I first started the car this morning. Iam a very unhappy Toyota customer. Back to the dealer on Monday - my patience has just about run out

10-05-2010, 01:17 PM	#25
motoxxx3 Drives: 2009 YARIS 1.0 VVTi Join Date: Aug 2009 Location: YORK, ENGLAND Posts: 21	After taking legal advice my car is back in at Toyota - Iam not happy - 5 attempts to fix it and still have the problem! they have assured me that this time the the car will not be given back to me until this fault is 100% fixed. Watch this space!

10-05-2010, 05:11 PM	#26
pspeezy Drives: 09 Yaris Sedan Join Date: Sep 2010 Location: Orange County, California Posts: 72	dang thats a bummer to hear, hope everything turns out okay.

10-14-2010, 11:10 AM	#27
motoxxx3 Drives: 2009 YARIS 1.0 VVTi Join Date: Aug 2009 Location: YORK, ENGLAND Posts: 21	Final post. Toyota have had my car for 4 weeks in total. Changed every component in the system. It has now transpired that this is an inherent characteristic of the Yaris T2 1.0 model 06-10 without aircon. Not just my car does this - all of this particular model Yaris' do it - and I have witnessed this now on other cars like mine. So there we go folks, Toyota don't know what their own cars do, or why they do it, or if it is even actually a fault. Turns out mine wasn't the 1 in a million lemon after all....just one of a bunch of lemons. Back to a Honda next time.....probably.

10-14-2010, 11:35 AM	#28
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	That is really strange, and one reason that I am glad that here in the US we get Japanese made Yaris instead of French made ones. It basically means that the voltage is significantly sagging, but stepping on the accelerator normally has the opposite effect - It should raise the voltage, as the alternator should have a greater output at higher RPMs. When you are driving at night, do you notice that your headlights dim when you step on the accelerator?

10-15-2010, 06:45 AM	#29
motoxxx3 Drives: 2009 YARIS 1.0 VVTi Join Date: Aug 2009 Location: YORK, ENGLAND Posts: 21	No the headlights and all dashboard lights do not dim. However the interior lamp does dim in sync with the blower speed slowing down. The tech told me the ECU sends a signal to boost alternator output when the lights are turned on, but it does not send a signal when the blower is turned on. This explains why the problem does not occur when the lights are turned on. I have myself now checked a couple of 1.0 T2 Yaris and they do it also. The 1.0 & 1.33 TR versions WITH aircon do not do it. I totally agree with your comment about the Japanese built Yaris. They are sure to be better quality. The French built ones we have in Europe have VALEO electronics, which have a bad reputation. The Jap ones probably have Hitachi, Denso or Toshiba electronics.