mfairoze

Feb 8 2007, 10:36 AM

We try to achieve win-win situation. to find the best solution.

seizai

Feb 11 2007, 06:36 PM

after we change extrator n o2 sensor location, o2 sensor matter can be solve?

Quote:

 

sifu-sifu,

just want to clarify the O2 sensor problem:-

i) when O2 sensor is disconnected, MIL doesnt light on = means ECU mulfunction only on this issue coz cannot read the signal
As mention before our O2 sensor does not work that way because it does not have the heater circuit to detect heater faulty.

ii) when testing O2 sensor condition (3 min at 3000rpm), RPM swing = ECU communication problem but O2 sensor can be tested by using OBDII
The so call IT 2 tester in UMW was not update (firmware) last time but now it will work to capture the reading. But as mention they have change the test procedure to 2500rpm/4mins which will not causes the fluctuation.

iii) our ECU doesnt have any problem on A/F ratio, if working temparature > 300C, the O2 sensor works and the ECU able read the signals and adjust accordingly.
Our Avanza design are using a few element to measure and to archiving the best AFR.
1. temperature sensor - at air enclosure
2. voltage signal feedback -  from O2 sensor when it reach to >350°C vari from 0V-1V

please clarify :TQ

mfairoze

Feb 15 2007, 01:54 PM

Last friday, I went to Selayang SC to have my O2 sensor tested.
Thank you to Mr. Jit for allowing me to witness the test.
I was shocked that they used an ANALOGUE multimeter. Where is the IT2 tester?
But I was not arguing,just keep my mouth shut and just see what they were doing.
Technician asked me to see the voltage signal indicated by "that" ANALOGUE tool.
At the same time he was pressing the gas pedal and maintain at 3000 rpm.
At this point, I was arguing about the purpose of doing that.
The said it is one of the step mentioned in the test procedure.
Was it to keep the sensor hot so that right range of voltage signal can be produced?
So it can be said that heater is a MUST.

So I disagree with what they were doing.Test not completed and was phostponed to another date. Mr. Jit promised to refer this to HQ.

Sifu Ocmax, do you have any idea on normal voltage signal range at idle? thank you

meehailam

Feb 21 2007, 01:37 AM

Hi guys, long time haven't come here liao...luckly still can log in :P
Just wondering, anyone considered writing up something about this O2 problem in wikipedia section on Avanza? Link here:

http://en.wikipedia.org/wiki/Toyota_Avanza

I was about editing it, but then donno what to write coz lack of technical knowledge of this problem. Maybe some of you sifu will want to 'contribute' some update to the wiki info (but I am not sure if it will attract law suit.. please consider this). And link it up with reference to this site (another danger being drag into law suit?)

Or anyone fancy writing to all of the top 24 management officers at the TYT Motor Corp? We all can chips in the stamps cost..hehe

http://stocks.us.reuters.com/stocks/office...Nav-11-Officers

:P

PS: wah can change testing manual when the steps don't work...like that no better than to say 'it's design to be like that one lah'.. make no different!

AvanzaKID

May 4 2010, 11:01 AM

Helo.... am a owner of a 1.5G Auto. hit this problem when I reach junction, the engine cuts off. I've went thru some of the o2 issues....and is wondering if I have the same problem. i've sent in my car yesterday and all they said was that I hv installed a foot-pedal lock that cuts off the starter is giving the problem (suspected) and had disconnected it. But the same problem happened this morning.

I would like some advise as to what I can do next ? I do not want SC to tell me to change the whole ECU or something just to test their theory and spend time in and out of SC.

Thank you all.

ppfoong

May 5 2010, 10:04 AM

Instead of waiting for Monday, I think you could go to another SC (the bigger one). Or if you are not claiming for warranty, might consider go for outside shop.