2005 Mercedes Benz C240 ENGINE NOT STARTING

2005 MERCEDES BENZ C240
85,000 MILES
Avatar
AKINYEMI22
  • MEMBER
  • 10 POSTS
I have a mercedes benz 2005 c240 4matic, the engine does not roll or crank but all the lights on the dashboard light up normally but the fan also comes up rolling at a high speed. I have tried different things like removing the battery terminal but its still the same. I had it scanned but the ecu could not communicate with the scanner. I did this using three different scanners all to no avail. the ecu could not communicate with the scanners. what could be the cause of this problem
Jun 16, 2013 at 10:55 PM
Advertisement
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
Check the fuses and fusible links. A power supply is most probably missing somewhere.

The other possibility is the immobilizer is triggerred. This would result in the ECM not communicating with the scan tool. If you have a spare key with immobilizer transponder, try using it.
Jun 17, 2013 at 12:04 AM
Avatar
AKINYEMI22
  • MEMBER
  • 10 POSTS
I already used the spare key, and its still not working
Jun 17, 2013 at 12:10 AM
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
Then you need to check for missing power supply. Have the fuses and fusible links checked.

At the Data Link Connector, test for battery voltage at terminal # 16.
Jun 17, 2013 at 12:14 AM
Avatar
AKINYEMI22
  • MEMBER
  • 10 POSTS
Hi just spoke to a friend and he said it could be the SAM signal activation module is that possible just want to confirm
Jun 17, 2013 at 5:16 AM
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
Yes, it is possibleand there are many possibilities. you should start with the basics checks instead of worrying what it could be.

Have you tested the DLC for power supply?
Jun 17, 2013 at 10:44 PM
Avatar
AKINYEMI22
  • MEMBER
  • 10 POSTS
I haven't tested the DLC yet, cause I don't know where its located or what it looks like. can you please give a description of its location or a picture. that would be helpful
Jun 17, 2013 at 11:05 PM
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
The DLC is the connector where you plug in the scan tool.
You had the vehicle scanned so I believe you know where it is located. you would need a DVOM to test terminal # 16 for battery voltage.
Jun 17, 2013 at 11:10 PM
Avatar
HDBXFGV
  • MEMBER
  • 1 POST
Where is the cencer on the car
Sep 10, 2014 at 3:44 PM
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
What sensor are you referring to?
Sep 22, 2014 at 3:30 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.