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Ok, just to make sure I am on the same page, the check engine light does not come on when you turn the key to the on position for its normal self check, correct?
If so, I need to get the 17 digit vin number to pull the schematics so we can trace the issue
Sorry, I will need to opt out and see if another expert can help. I dont have the wiring schematic for the check engine light circuit
Hello, you said there are no codes, does the scanner communicate when connected to the diagnostic port and give you a message that there are no codes?
Yes, had to go offline for a bit.
There is a chance that the bulb may just be burned out.
Let me check o something and get back to you.
You can remove the instrument cluster and then access the bulb on the back of the circuit board. At the back you'll see a couple of electrical connectors, there are two wires related to the check engine light, a red/blue and a violet/green one, the red/blue should be hot with the key on when measured to body ground, if this is ok, turn the key off, connect the voltmeter or test light from the R/B to the V/G there should be voltage there when the key is turned on for a few seconds and then go off, if this checks out the bulb is the problem, the manual shows this to be an lead so make sure you get it from the Toyota dealer for the correct one.