Help, Rear Defogger shuts off Fuel Pump - Toyota Yaris Forums

sm2by · 05-29-2011, 09:11 AM

I just got my Yaris from the Dealer after a warranty replacement on the oxygen sensor, my car had rough idling so the sensor was to blame. After 4 days, while getting ready to drive out my Yaris sputtered and stalled, I tried to restart but it just choked and stalled again, then I turned off the lights, radio and Defogger. It suddenly came back to life, but when I switched on the Defogger it started to die again.

I brought it to a local shop, they said the Fuel Pump is not getting any power when the Defogger is on, they also said a relay was clicking when the Defogger was switching on so maybe a faulty relay? Planning to take my Yaris back to the dealer for some serious Questions and if necessary Accusations....

CTScott · 05-29-2011, 10:51 AM

Those circuits are pretty well isolated. The only thing I can imagine is that they damaged the insulation on a couple of wires and now they touch.

why? · 05-29-2011, 11:42 PM

Quote:

Originally Posted by CTScott

Those circuits are pretty well isolated. The only thing I can imagine is that they damaged the insulation on a couple of wires and now they touch.

hopefully it is something simple and stupid like that. My father had a car with electrical gremlins, the car would die in the middle of the highway, he would open the passenger door and it would start right back up. What a nightmare.

Vinceb · 05-30-2011, 12:10 PM

chance the alternator is dying? can't supply the required power when everything is on? keep us posted on what you find out.

05-29-2011, 09:11 AM	#1
sm2by Drives: 08 Yaris Sedan (1.3E Vios) Join Date: Jan 2010 Location: Manila, Philippines Posts: 3	Help, Rear Defogger shuts off Fuel Pump I just got my Yaris from the Dealer after a warranty replacement on the oxygen sensor, my car had rough idling so the sensor was to blame. After 4 days, while getting ready to drive out my Yaris sputtered and stalled, I tried to restart but it just choked and stalled again, then I turned off the lights, radio and Defogger. It suddenly came back to life, but when I switched on the Defogger it started to die again. I brought it to a local shop, they said the Fuel Pump is not getting any power when the Defogger is on, they also said a relay was clicking when the Defogger was switching on so maybe a faulty relay? Planning to take my Yaris back to the dealer for some serious Questions and if necessary Accusations....

05-29-2011, 10:51 AM	#2
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	Those circuits are pretty well isolated. The only thing I can imagine is that they damaged the insulation on a couple of wires and now they touch. __________________

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05-30-2011, 12:10 PM	#4
Vinceb Drives: 2008 5 Speed Sedan Join Date: Jan 2011 Location: Nova Scotia, Canada Posts: 77	chance the alternator is dying? can't supply the required power when everything is on? keep us posted on what you find out.