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sprinkles08, ASE Certified Technician
Category: Toyota
Satisfied Customers: 22653
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Toyota Camry: Ok...replaced fuel pump in a 2007 toyota camry....worked

Customer Question

Ok...replaced fuel pump in a 2007 toyota camry....worked for a few minutes then power again when key is on to pressurize the fuel system
Submitted: 1 year ago.
Category: Toyota
Customer: replied 1 year ago.
Constant 10.5 voltage at pump on one lead but didn't realize that key was not actually on...probably replaced a pump that was working fine. Already put the seat back in...Definitely a fuse, relay or wire issue....Checked all fuses and Relay that are visible....
Customer: replied 1 year ago.
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Expert:  sprinkles08 replied 1 year ago.
Hello and welcome to JustAnswer!
The wire you're seeing with voltage is almost surely the sensor circuit, it's reference voltage rather than power. the fuel pump would only have power when the key is first turned on or when cranking.
The fuel pump power wire is gray. If there is no power there, fuses and the circuit opening relay are good then you either have a wiring issue or the engine controller isn't awake.
Doe the ECM have communication with a scan tool at the time it won't start? If so, are any codes setting?

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