C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Mercedes-Benz C230 (W203) No Crank - Cooling Fan On High Speed - Solved

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Old 02-19-2019, 07:28 PM
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2007 S600
Mercedes-Benz C230 (W203) No Crank - Cooling Fan On High Speed - Solved

This was an interesting situation that I thought we would share with you. 08/2004 production C230 comes in no crank, cooling fan on high speed with key in position 2 and multiple failure messages in the information center, to include coolant temperature, battery/alternator. display and ESP. Inspection revealed fuse #52 was blown. More invasive testing showed a short to ground downstream of the fuse. Further testing revealed a short to ground on ignition coils #1 and #4, which had been replaced by us with Delphi less than one year ago.

Replacing the ignition coils corrected the short circuit condition.

Posted in hopes this may prove helpful to someone with a similar symptomology...
Old 02-19-2019, 07:55 PM
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C320
Cooling fan goes to full speed when it loses CAN BUS connection to the ECU.
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Old 09-01-2019, 07:36 AM
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2005 CLK500
Can Bus

Originally Posted by tjts1
Cooling fan goes to full speed when it loses CAN BUS connection to the ECU.
Good morning, hope all is well. I am experiencing a "no start" for 23dys and counting. I have been seeking advise and suggestions from numerous members.
Can you elaborate on how I can execute your suggestion?

Respectfully and valued
Arjuna

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