Toyota Yaris Forums - Ultimate Yaris Enthusiast Site
 

 


 
Go Back   Toyota Yaris Forums - Ultimate Yaris Enthusiast Site > Technical Forums > DIY / Maintenance / Service
  The Tire Rack

Reply
 
Thread Tools Display Modes
Old 08-24-2022, 09:34 AM   #1
Asadeng
 
Drives: Yaris 1999 1.0L
Join Date: Aug 2022
Location: Pakistan
Posts: 2
Yaris / Echo sedan 1SZ-fe 1.0 L cooling fan trigger at high temperature

Dear all,

I have issue with my yaris installed with 1sz-fe engine. the issue is very strange . the cooling fan turned on at 206F or 97C while according to manual it should be at 200F or 93C. i have changed cooling temperature sensor. two wires. its mean the fan on and off controlling by ECU not from sensor. i have completed radiator service. have no issue with overheating problem but fan trigger on temperature should be less as per manual 93C. on AC switching on fan keep runs on

kindly help me to out for this issue.
Asadeng is offline   Reply With Quote
Old 08-24-2022, 09:57 PM   #2
toyotavios_11
 
Drives: Toyota Vios
Join Date: Feb 2013
Location: MY
Posts: 49
could be fan relay issue, try to replace it
toyotavios_11 is offline   Reply With Quote
Old 08-25-2022, 01:44 AM   #3
komichal
 
Drives: Yaris 2007 1.3 2SZFE 64kW
Join Date: May 2012
Location: CZ
Posts: 247
I would say this is normal.
The coolant boiling temperature is not 100 degrees Celsius but a lot higher and engines do need high temperatures to work efficiently. You do have a proper coolant in the system and not just plain water, right?
I would not suspect the relay either - the relay engages/disengages based on the info from the ECU. As long as it does engage - it is fine.
komichal is offline   Reply With Quote
Old 08-25-2022, 04:49 AM   #4
Asadeng
 
Drives: Yaris 1999 1.0L
Join Date: Aug 2022
Location: Pakistan
Posts: 2
Dear Sir,
Thank you very much for your prompt answer, yes new coolant has been added. you really decreased my concern about knowing that the boiling point with coolant is not the same as normal water. i have installed odb2 application Torque on my din panel keep monitoring all activity of engine. while driving engine temp range varies between 80 to 90 in my hot zone. my AFR value is at optimum toggling around 14.7 its mean including temperature values from sensor to ECU is correct. Anyhow, thank you very much, sir.
Asadeng is offline   Reply With Quote
Old 08-31-2022, 02:14 AM   #5
sh0rtlife
 
Drives: 2007 5dr canadian import
Join Date: Dec 2016
Location: pacific north WET
Posts: 455
in theory
if your thermostat is acting up it can "trap" heat in the engine and will be hotter than the temp switch is seeing as the switch is on the cold side of the cycle

its cheep and easy...
sh0rtlife is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
NEWS: TOYOTA REVEALS ALL-NEW YARIS SEDAN AT 2006 LOS ANGELES AUTO SHOW VitzBoy General Yaris / Vitz Discussion 5 09-05-2010 09:53 PM
2007 Yaris Pricing Info ! YarisBueller New YARIS Purchase Forum 104 06-24-2009 05:54 PM
Echo and Yaris fan forum jambo101 General Yaris / Vitz Discussion 7 01-26-2009 01:27 PM
Yaris and Echo short shifters sale, $30 off! TWM Performance TWM Performance 8 11-17-2008 03:23 PM
Yaris Sedan Vs. Yaris 4dr. hatch Meow General Yaris / Vitz Discussion 11 10-29-2006 03:11 PM


All times are GMT -4. The time now is 01:19 PM.




YarisWorld
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.