ECM- electronic control module

hmmm, let me see. just came back from class. we did a hands on practical job on a mercedez e 200, 210 model, 111 engine. learning abt diff control modules. well...what i'm gonna say next will make me sound like a total idiot or a bloody noob on cars. i never knew that cars nowadays have more then 1 control module. during lesson time, my instructor touched on this topic. he asked the whole class how to tell him how many control modules were there in that particular car. the whole class went blur and blank. isshhh! to call ourselves mechanics....what lies. even the instructor was surprised. then he said that in that car has more then 10 ECM'S. one for every damn thing. for engine one, transmission one, aircon, traction control, differentila gearbox, air bags, abs, they even had one for each door and its was for the power window, and the locks. sshiisshh...i worked on that car before and i never knew...i did see 3 ecm's near the engine dept but all the while i thot that was for the engine only and some other stuff like the abs and air bag, shit like that. lol! i was so wrong. however, i did asked him abt the vehicles immobilizer, on how we can, if possible, override the damn system. he said that there was no way! even if there was a way he would never teach us such things, haha.

ok now, today i learned that for the mercedez, when the engine has some probs or the car has some other probs, it doesnt immediately give us the MIL(malfunction indicator light). unlike other japanese cars. it stores em up intil something very serious pops out then only will it light up. so thats why for the mercedez, we always have to scan thru its system whenever we do service and maintenance for the car. that is why for a mercedez, if the car is more then three years old, and we plug the scanner in, we have so many diagnostic trouble codes. and just erase em. if it cant be erased thats when we have to start gettin our hands dirty.

so i guess thats all i can say rite now for this post. till next time when i can think of something else or learned something useful at work.