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Chris (aka-Moose)
Chris (aka-Moose), Auto Technician
Category: Toyota
Satisfied Customers: 901
Experience:  16 years of experience
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Mando No power to ecu no engine light cranks but no start

Customer Question

Customer: mando No power to ecu no engine light cranks but no start
JA: Thanks. Can you give me any more details about your issue?
Customer: Service engine light,, is off,,, cranks but no start,,, looks no power ecm
JA: OK got it. Last thing — JustAnswer charges a fee (generally around $20) to post your type of question to Toyota Experts (you only pay if satisfied). There are a couple customers ahead of you. Are you willing to wait a bit?
Customer: ok
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Submitted: 1 year ago.
Category: Toyota
Expert:  Toyota Service replied 1 year ago.

Hello. Welcome to Just Answer. Please allow me to assist you. Please advise of the make, model and year of the vehicle you have this problem with; thanks

Customer: replied 1 year ago.
2009 VIN: 1NXBU40E09Z099002 Style / Body: Sedan 4D Engine: 1.8L I4 EFI
Toyota Corolla Base / LE / S / XLE
Expert:  Toyota Service replied 1 year ago.

No power to the ECU (assuming that all of the fuses associated with the ECU are good) would suggest that the EFI Mail Relay may be faulty. Did you check all of the fuses?

Customer: replied 1 year ago.
10 fuses check ok
power to injectors and coil
Customer: replied 1 year ago.
immobolizer working and but no mill light when you turn key over
Customer: replied 1 year ago.
10 amp fuses working
Customer: replied 1 year ago.
efi main relay what color and location
Customer: replied 1 year ago.
Customer: replied 1 year ago.
Unable to locate EFI Relay?
Expert:  Toyota Service replied 1 year ago.

The EFI relay is mounted under the fuse panel in the engine compartment. You need to take the fuse panel apart to see it. This is a huge job if you are skilled in this type of disassembly.

Customer: replied 1 year ago.
Easy for me
Customer: replied 1 year ago.
what color is the relay,,, looks like its black or blue
Expert:  Toyota Service replied 1 year ago.

The relay colors change depending on who supplies the parts. The best way is to check power. Power will be lost to it when you pull the 20 amp EFI fuse.

Customer: replied 1 year ago.
did not EFI relay,, I took apart the fuse panel,,, ,,,
What I do see is 2 10 EFI Fuses,,, Traces them the go straight to ecm wiring and the other wire goes to connector,, took me 2 hours to take the fuse panel apart,,, can you verify with this Relay is located please
Customer: replied 1 year ago.
Did not find the EFI Relay
Customer: replied 1 year ago.
Could used help finding this relay
Expert:  Toyota Service replied 1 year ago.

Sorry for the delay. It was snowing heavily here and the internet dropped out. The relay is supposed to be directly under the 20 amp EFI MAIN fuse (according to the Toyota service manual. )

Customer: replied 1 year ago.
No 20 amp fuse. There is 2 10 amp fuse. Can you sent me engine electronic schematics. To find efi relay. Took the fuse box apart. No
Expert:  Toyota Service replied 1 year ago.

Is this car in the USA?

Customer: replied 1 year ago.
this car was built in usa
Customer: replied 1 year ago.
could used schemetics to locate EFI RElay,,
but I cannot locate EFI
Expert:  Toyota Service replied 1 year ago.

According to the schematic I have the EFI relay is a solid state unit attached under a panel with 4 fuses on it. Not the main fuse panel Under the hood. One of these fuses is the EFI fuse. The power form the EFI fuse goes directly to the relay. If you can find the EFI fuse you will find the relay connected to it.