Weird EIS Issue: No crank unless key is held upward
11-29-2020, 12:32 AM
#1
MBWorld Fanatic!
Thread Starter
Join Date: Mar 2005
Location: America
Posts: 2,365
Received 180 Likes
on
147 Posts
1999 C43 AMG, 2005 E55 Wagon
Weird EIS Issue: No crank unless key is held upward
On my 1999 C43 I've been chasing a random no start issue for years! And I finally tracked it down. See the video below:
As you can see in the video, if the key is "down" while turning, the car will not start. If I push "up" on the key as I turn it, the car starts. You can also see how this corresponds to power at the blower fan. If the key is "down" the blower fan reads no output on the HVAC display. If I push "up" on the key, the HVAC shows power at the blower on HVAC. The same thing happens for turn signals and cruise control: if key is "down" they don't work, if key is "up" they work.
This would all indicate something up with the EIS tumbler and my basic instincts say it's a simple solder joint (or two) in the EIS tumbler. Is it that simple? Has anyone seen this before?
As you can see in the video, if the key is "down" while turning, the car will not start. If I push "up" on the key as I turn it, the car starts. You can also see how this corresponds to power at the blower fan. If the key is "down" the blower fan reads no output on the HVAC display. If I push "up" on the key, the HVAC shows power at the blower on HVAC. The same thing happens for turn signals and cruise control: if key is "down" they don't work, if key is "up" they work.
This would all indicate something up with the EIS tumbler and my basic instincts say it's a simple solder joint (or two) in the EIS tumbler. Is it that simple? Has anyone seen this before?
