Hi,I have an Turbo II S5 from 1991 (european version).
I need to check ,but I can't ,the car is without the "Check Engine" light on the dash board(see below).How can I do?
[IMG][/IMG]

 

hmmm, strange. id assume one of those has to be the CEL in some way? have you tried to diagnose yet? maybe if you try it and something blinks that must be your CEL.

 

There is a check connector w/three wires near the lead coil. Two of the wires are Yellow while the third wire is Black/White. You can use a LED code checker light like the one used to check error codes for an S4 and use it at the check connector to pull error codes for an S5.

http://2ndgenrx7.freeservers.com/error%20codes.html#LED Circuit Figure

 

Ok understand,I need use the method for the S4.
For the tester light it's ok one like this(I can't buy it from radio shack)?
Led 12V - Ø 5 mm :

 

Check the link provided and it describes why you need LED lights. If you have these then okay. If not LED it could damage the ECU.

 

LED bought..but I have a BIG problem with the green connector,the DCC2 missing.
See the picture below..
Recap:
The S5 method dont work because the check engine light on dashboard is missing.
The S4 method dont work because the dcc2 connector missing
If someone can help me,really I don't know how I can do.I'm front of a blocked road

 

The LED code checker uses the B/W wire (has power w/key to on) and one of the Yellow wires (pulses a ground to flash the LED light) so it looks like you got what you need. The diagram for the S4 is for the S4 and not the S5. As in post #3 the check connector only has three wires (the S4 has four wires).

 

Perfect, I resolved.
For evryone need: