CEL check engine light not working on my 2005 SRT-10

[master_328]

Hello folks,

my check engine light (CEL) is not working at all. With ignition turned on only, it`s also not working. I just removed the dash, to check for a broken bulb, but I can`t find the bulb. Is it an LED? How could I trigger it to test it? I already checked ECU but I could not find the CEL wire. Is this signal transferred by a bus system?

 

[VIPR PWR]

You may want to see about downloading the repair CD for the 10's ... I believe it's on here somewhere or someone may have a copy ... It should have wiring diagrams etc ..

 

[master_328]

Thanks for your input.

I already checked ECU pinouts. But I couldn`t find a special CEL signal.

Does anybody have wiring diagrams of the dash (tacho) unit?

 

[ViperCLKGTR]

How do you know it's not working? Half serious, half jokingly

 

[master_328]

Well CEL should work when ignition is on, but engine not running. There was also a fault code because of a damaged spark plug, but there was no light. So it`s definitely not working. I just bought the car, maybe someone manipulated the light, but there seems to be no bulb to simply pull off...

 

[followme2dq]

Not sure, but take the gas cap off and let it run, this throw an EVAP code.

 

[master_328]

Thanks for help.

Have this fault code stored...but there is no check engine light :-(

The light should also work when turning the key...but it doesn`t

 

[ViperCLKGTR]

Well CEL should work when ignition is on, but engine not running. There was also a fault code because of a damaged spark plug, but there was no light. So it`s definitely not working. I just bought the car, maybe someone manipulated the light, but there seems to be no bulb to simply pull off...

I know some readers will show every code ever registered when they get plugged in are you sure it's not a past code?

You do have a point about the ignition on, I don't think it's a bulb it should be a board.

 

[ViperJeff]

Do an instument cluster test (do not start). Hold the trip reset button and turn the key to on(don't let go of the trip button).

The cluster will do a test, the CEL turns on and off if I remember right. Maybe someone with a 2005 that is bored will also run one and see what happens

 

[master_328]

Do an instument cluster test (do not start). Hold the trip reset button and turn the key to on(don't let go of the trip button).

The cluster will do a test, the CEL turns on and off if I remember right. Maybe someone with a 2005 that is bored will also run one and see what happens

Thank you...test was successful. But check engine light is definitely not working...everything else is working fine.

 

[master_328]

I just solved this problem. There was a black tape on the backside of the display. Seems like the pre-owner preferred to shut sown CEL light instead of searching for faults

Thanks for your help guys.

 

[ViperJeff]

I bet it wasn't the owner, bet it was a dealer

 

[ViperCLKGTR]

I bet it wasn't the owner, bet it was a dealer

x2, I would be willing to bet that

 

[SANCHOBA]

so...is it lit?

 

[SlvrSnake]

I just solved this problem. There was a black tape on the backside of the display. Seems like the pre-owner preferred to shut sown CEL light instead of searching for faults

Thanks for your help guys.

That is some shady S&*^!

 

[master_328]

so...is it lit?

Yes, it is working. After I have new plugs put in (one of them was cracked), I will check for fault codes again. Maybe I need your help again...