190e keyon/engine off values
 

Hey fellas,

Posted this earlier but decided the post name was not correct, so here it is again.

I just checked the keyon, engine off value at pin 3 and the reading keeps giving me a solid 30.7. From what I can find here it seems that reading should be a steady 70, for a federal car.

Is my car trying to tell me something? If anyone knows this code it would be much appreciated.


Thanks,

Josh

88 190e 2.3 with a 91 engine...

Thirty is seventy!!

You are reading duty cycle, it is all a matter of point of view. Is the cup half full or half empty OR is it 30 percent full or seventy percent empty.

Good enough for me, thanks a lot Steve!

If you want to read it right, just reverse the leads. Place the positive lead in #2, and the negative in #3. That should give you the 70.
Read from that point on. And make sure of it.
Example:
If you read 30 (KOEOff), any fault values will be opposite on the fault codes table once the engine is running.

You may get a fixed 70% and start looking for what it means, when in reality your fault code is a 30%.

An example of fault codes:
70% - No TD/TN siganl. Open circuit in wiring at KE unit.
30% - Coolant temperature sensor faulty.