2003 c240 no crank no start!!! Help
#1
2003 c240 no crank no start!!! Help
Have a 2003 C240, wont crank at all, wont turn over with key, can feed 12 volts to fuse #52 and the starter will turn over, need help where to go next, thanks in advance for your help
#3
The key turns and powers everything just won't power the starter, what should I check in the SAM? That's the front fuse box under the hood correct? Fuse 31, 52 and 57 are all good. The relay doesn't click and I switched with other relays and no change.
Last edited by JP70; 12-19-2015 at 05:53 PM.
Trending Topics
#8
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 182
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
You need to check the whole process. Make absolutely sure that fuse 52 is fine & not corroded. The system also interrogates the CPS & temp sensor before start authorisation. Make sure those connections are good.
https://mbworld.org/forums/c-class-w...t-process.html
https://mbworld.org/forums/c-class-w...t-process.html
#9
I checked the connections on both and they are clean, I just found out that the previous owner installed a cheap aftermarket crank sensor from autozone made by duralast. Will that cause a no crank condition?
#10
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 182
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
It can if faulty. If the ECU thinks that the engine is already rotating it will not allow cranking.
Last edited by Glyn M Ruck; 12-30-2015 at 01:41 AM.
#12
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 182
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
This is where DIY can get expensive because you can't try things from the spares dept. like a dealer can. CPS frequently does not throw a code but can still be bad.
#14
You really gotta get it hooked up to an SDS. Your issue is likely key or ignition switch related, and diagnosing them you really need to use SDS to test DAS. (Drive Authorization System)
#16
Similar Issues with my 2003 C240.
Car died while entering my parking garage. No crank.
After hooking a battery charger after about an hr......the car started no issues.
Drove the car to my mechanic and he checked the alternator and battery - no issues. He also drove it for a few days no issues.;
Took the car back after a few days and as I was driving back it died on the highway. After a few minutes it started and I returned it to him.
I had him check some key fuses and relays...all good.
Again it was there for a few days and he drove it on and off no issues. I took it back and after a few days same issues ....it had difficulty starting and then again died on the road. I started it after a few minutes and drove it to my mechanic and it died as i was entering his shop. He tried to start and again no crank and he immediately realized it was the AC Compressor.....it was getting heated or stuck........he loosen the bolt a bit on the compressor and it started right away.
AC Compressor replaced and so far no issues. This issue will cause the car to not crank sometimes if it is stuck or die on while driving as it ill get stuck and kill the engine RPM
Dr Ash.
Car died while entering my parking garage. No crank.
After hooking a battery charger after about an hr......the car started no issues.
Drove the car to my mechanic and he checked the alternator and battery - no issues. He also drove it for a few days no issues.;
Took the car back after a few days and as I was driving back it died on the highway. After a few minutes it started and I returned it to him.
I had him check some key fuses and relays...all good.
Again it was there for a few days and he drove it on and off no issues. I took it back and after a few days same issues ....it had difficulty starting and then again died on the road. I started it after a few minutes and drove it to my mechanic and it died as i was entering his shop. He tried to start and again no crank and he immediately realized it was the AC Compressor.....it was getting heated or stuck........he loosen the bolt a bit on the compressor and it started right away.
AC Compressor replaced and so far no issues. This issue will cause the car to not crank sometimes if it is stuck or die on while driving as it ill get stuck and kill the engine RPM
Dr Ash.