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AutoTech08
AutoTech08, Workshop owner
Category: Toyota
Satisfied Customers: 973
Experience:  Diploma in Automotive Engineering, 30 years working experience.
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My check engine light doesnt come on..bulb..ECU

Resolved Question:

my check engine light doesn't come on. The bulb is good, how do I check it at the ECU?
Submitted: 7 years ago.
Category: Toyota
Expert:  mike c replied 7 years ago.
hello. what year and model and engine do you have?
Customer: replied 7 years ago.
The check engine light on the dash of my 87 Toyota 4 Runner does not come on when you turn the key on. It never comes on. The bulb is good. I put a test light on the wire for the Check Engine light on the ECU pinout while it was plugged in, and the test light did not come on either, does that mean that the ECU is bad? Is there a way to check it?
Expert:  mike c replied 7 years ago.

im sorry i dont have any electrical wiring diagrams for this vehicle due to the age. i will open the question up and maybe another expert can help you..

Customer: replied 7 years ago.
It has a 22RE non turbo
Expert:  AutoTech08 replied 7 years ago.

 

Hi there,

 

Here are the diagnostics for the MIL.

 

graphic

 

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Customer: replied 7 years ago.
Will this car run without an EFI computer? And could that have an effect on the Check Engine light?
Expert:  AutoTech08 replied 7 years ago.

 

The EFI computer is the main brain for the engine operations and without it, the engine would not start.

 

If it is faulty or not installed, there would be no Check engine light.

AutoTech08, Workshop owner
Category: Toyota
Satisfied Customers: 973
Experience: Diploma in Automotive Engineering, 30 years working experience.
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