2008 Yaris Fuel Pump Problems - Toyota Yaris Forums

B.B._07 · 03-31-2018, 05:33 PM

Check the EFI and IG2 relays located in the engine bay fuse box along with the C/OPN relay in the interior fuse box. Relays can fail intermittently so the best way to check them is to pull them out and power and ground the coil side and listen for the clicking sound as relay is powered and de-powered. Also check the EFI and AM2 fuses in the engine bay fuse box and the IGN fuse in interior fuse box. I'd recommend a test light for testing the fuses but if you don't have one pull the out to get a close look. If everything is fine then you need to confirm you have good power and ground at the fuel pump. Black wire to the pump is power and white-black wire is ground.

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03-31-2018, 05:33 PM	#3
B.B._07 Drives: 07 5dr Join Date: Nov 2015 Location: YYC Posts: 197	Check the EFI and IG2 relays located in the engine bay fuse box along with the C/OPN relay in the interior fuse box. Relays can fail intermittently so the best way to check them is to pull them out and power and ground the coil side and listen for the clicking sound as relay is powered and de-powered. Also check the EFI and AM2 fuses in the engine bay fuse box and the IGN fuse in interior fuse box. I'd recommend a test light for testing the fuses but if you don't have one pull the out to get a close look. If everything is fine then you need to confirm you have good power and ground at the fuel pump. Black wire to the pump is power and white-black wire is ground.