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 02-04-2021, 06:41 AM   #1
kaypie
 
Drives: daihatsu sirion
Join Date: Feb 2021
Location: South Africa
Posts: 3
Unhappy intermittent fuel pump start

Hi folks, newbie here - thanks for the great forum!

Hoping you can point me in the right direction.
My wifes Sirion (Yaris T3 engine) has a strange issue where the fuel pump only switches on intermittently. Initially I thought it was the fuel pump, so I replaced the Denso pump and filter for a new Bosch unit.

After replacement the vehicle started, idled, and did a long test drive without any issues, several test starts afterwards was also fine.
The car stood for a few hours, when trying to start it again the pump wouldn't switch on.

I'm still testing a theory whereby when I pull the EFI fuse for a minute and replace it, it allows the pump to switch on again (some sort of "reset"?)

Is there perhaps another relay or fuse I can check that could be acting up?

As part of the initial troubleshooting I checked the coils, spark, battery, fuses under the hood. I also disconnected the battery while changing the pump.

Hope you can help!
kaypie is offline   Reply With Quote
Old 02-04-2021, 06:59 AM   #2
kaypie
 
Drives: daihatsu sirion
Join Date: Feb 2021
Location: South Africa
Posts: 3
I've found this diagram for the internal fuse box behind the cubby, I noticed "Fuel Pump Relay" at the bottom left, so I guess it's worth replacing
Attached Images
File Type: png Screenshot from 2021-02-04 12-57-08.png (31.4 KB, 14 views)
kaypie is offline   Reply With Quote
Old 02-04-2021, 08:10 AM   #3
kaypie
 
Drives: daihatsu sirion
Join Date: Feb 2021
Location: South Africa
Posts: 3
Well I've replaced the relay for what its worth, still nothing :/
kaypie 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
Fuel pump, sender, seal, wiring, and cluster mavrick DIY / Maintenance / Service 5 07-22-2019 06:34 PM
HELP: Swings but does not start after fuel filter replaced REV 2 11 DIY / Maintenance / Service 12 08-19-2013 02:38 PM
Fuel Pump Relay bronsin General Yaris / Vitz Discussion 4 08-07-2012 08:19 AM
Yaris Fuel Pump HTM Yaris General Yaris / Vitz Discussion 13 03-22-2012 04:34 AM
NEED ENGINE CHECK LIGHT CODE LIST Attitude Forced Induction Forum 12 04-11-2011 07:38 PM


All times are GMT -4. The time now is 08:36 PM.




YarisWorld
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.