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#1
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Electrical issues 2005 E320CDI
I'm wondering whether the CDI suffers from the "biodegradable" wiring that I hear other report on...
My issue. "Coolant level low" on dash several months ago. It comes on every time I start it. Replaced level sensor with new one, same message. Swapped know good sensor from my other CDI, same message. Then, car sat for a month while I was repairing some minor front end damage. Now "Batt visit workshop" with come on while driving. My scangauge which is always connected to the OBDII port report 13.9v consistently. Message will disappear, then return some time later. Its a recent battery, and cranks strongly. Glow plug light will come on while driving, stay on for several miles, then go off. CEL will come on...code P2015, which is intake manifold flaps. Car goes into limp mode...no turbo, no downshifts until stopped. Disconnected swirl flap linkage, still get the CEL and limp mode returns within a couple miles of resetting code. I disconnected batt for a full minute, hoping it may reset. Still same issues. Putting these all together, it seems like the computer has gone bonkers. Any ideas? The limp mode is the most troubling, because it truly makes the car unreliable.
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Mark in MA 05 MB E320CDI 402k Granite Grey Metallic 05 MB E320CDI 267k Black 05 MB E320CDI 232k White 05 MB E320CDI 209k Tectite Grey 99 Dodge 2500 Cummins 5sp 148k 62 Jeep CJ-6 120k |
#2
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I remember reading this concerning coolant level
Coolant visit workshop | Mercedes-Benz Owners' Forums I did a quick search and found a similar thread Coolant! Visit workshop! Help!!!! | Mercedes-Benz Owners' Forums |
#3
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Thanks for the info on washer tank. On quick glance, the washer tank is in the quarter panel. Can you get at the sensor by removing inner fenderwall?
Still troubled by limp mode. Any thoughts?
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Mark in MA 05 MB E320CDI 402k Granite Grey Metallic 05 MB E320CDI 267k Black 05 MB E320CDI 232k White 05 MB E320CDI 209k Tectite Grey 99 Dodge 2500 Cummins 5sp 148k 62 Jeep CJ-6 120k |
#4
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The bio wire went away in 96.
I'm wondering why an intake flap code would affect the trans, they don't seem to be related. I'd be studying wiring diagrams looking for a power or ground point common to affected systems. You might have mouse damage so look around in hidden areas. |
#5
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Unplugged swirl flap motor and put a 2.2k resistor to simulate operation. So far so good with no limp mode.
Unplugged coolant level sensor and put a 470 ohm resistor to simulate combination of coolant and washer fluid levels...so far so good. Many videos of removing swirl flap system altogether (mostly on the 5 cyl CDI and 4 cyl CDI). That may be the next step, but getting rid of limp mode is huge.
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Mark in MA 05 MB E320CDI 402k Granite Grey Metallic 05 MB E320CDI 267k Black 05 MB E320CDI 232k White 05 MB E320CDI 209k Tectite Grey 99 Dodge 2500 Cummins 5sp 148k 62 Jeep CJ-6 120k |
#6
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It doesn't affect the transmission, it kills turbo boost pressure, resulting in a car that won't get out of it's own way........
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#7
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Our guy claims no down shifts until stopped.
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#8
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Yes, limp mode on a CDI includes no turbo, upshifting very soon upon takeoff, and no downshifting until stopped. Flooring it gives no kickdown, you can manually downshift with the stick, but power is still limited to a crippling degree. In my case resetting the CEL would give normal performance for about a half mile before limp mode returns. Hopefully with this bypass resistor I'm done with swirl-flap-limp-mode for good.
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Mark in MA 05 MB E320CDI 402k Granite Grey Metallic 05 MB E320CDI 267k Black 05 MB E320CDI 232k White 05 MB E320CDI 209k Tectite Grey 99 Dodge 2500 Cummins 5sp 148k 62 Jeep CJ-6 120k |
#9
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I would consider the resistor bypasses to be a temporary solution not a permanent fix.
The swirl flap is important, it really affects engine performance. It is not just for emissions controls. The swirl flaps are moved based on engine rpm. The airflow through the intake manifold, especially once the air passes the divisions to each cylinder, is not constant, but intermittent. The swirl flaps are used to manage the pressure waves that can be set up in the intake runners as the intake valves open and close. The pressure waves can actually reduce the air flow coming into the cylinder. Remember that on a diesel engine, you are air limited, not fuel limited, so any restriction of air reduces the performance. We had the swirl flap motor fail on our 2008 ML and after putting the resistor in the line to get the car running again, the performance and mileage really suffered, until I could fix it correctly. We lost easily 3-4 mpg with the swirl flap bypassed. As for the coolant tank alarm, I will share this story on my 98 E300: Got in the car a few weeks ago, the low coolant message was showing. Looked under the hood to investigate, found a split in the upper radiator hose. If that alarm had not shown I would have gotten down the road and would have gotten stranded. Or worse lost my coolant totally and baked the engine. These systems are there for a reason.
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The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#10
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I absolutely agree...fix the problem, don't Band-Aid the symptoms.
Having said that, the resistors are troubleshooting tools. After replacing the coolant sensor, and still getting the message, it led me to believe it was wiring/computer. I've since learned that coolant and washer fluid sensors are in series, which is substandard design. I seldom say that about Mercedes...I think MB puts much more effort into robust design than other car makers. But when a failing washer sensor yields "Coolant Low", that's just poor design. Chirping at me at every start up about coolant level is like crying wolf. The coolant level sensor is valuable...twice it has led me to faulty water pumps on 2 different CDIs. But it is not mission-critical like oil pressure or engine temp. It is on the list to get sensors replaced and working. The swirl flaps are a performance measure. They are important, that's why MB put them in. They are for optimized performance/power. The resistor here is also a troubleshooting tool to confirm that the feedback from swirl flap motor was in fact the source of P2015 and limp mode. My main issue is that the feedback should be "swirl flaps not working...performance and power will not be optimized...visit workshop" It should NOT be..."swirl flaps not functioning...we're going to go ahead and cripple your car to the point where it is undriveable...visit workshop". That's the end of my rant. Thanks
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Mark in MA 05 MB E320CDI 402k Granite Grey Metallic 05 MB E320CDI 267k Black 05 MB E320CDI 232k White 05 MB E320CDI 209k Tectite Grey 99 Dodge 2500 Cummins 5sp 148k 62 Jeep CJ-6 120k |
#11
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Quote:
This kind of thing really isn't new, it saves a bunch of wires. Ford did it in the 70's for cruise control selection by using a different resistance value across 2 wires ( on, set , accel , decel ). This has since expanded to wiper switches, the wiper switch only puts a request to the body computer rather than taking full motor power. This probably follows the no DEF fluid = limp strategy. |
#12
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You can thank the EPA for that one, actually it's worse, it starts a counter, after so many starts (n = 16), you get NO start...
From my 2014 ML350 manual explaining the add DEF messages on the console: (When you get the message “xx Starts Remaining”) The DEF level has fallen to a minimum. You can start the engine a further 16 times. Have the DEF tank filled immediately at a qualified specialist workshop. You can start the engine a further 16 times. If DEF is not added, it will then not be possible to restart the engine. Refill the DEF tank with approximately 1 gal (3.8 l) DEF. I remember reading a story about an ambulance hitting this hard limit and it resulted in a bad deal for the patient involved.
__________________
The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#13
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Quote:
Rube Goldberg wiper control on the 210: Wiper switch, with different resistors for each mode -> input pin on the EIS (key switch) -> CAN bus message -> N10 front SAM -> left side K4 relay box -> motor Note there are 2 “K4” relay boxes on the 210, one is in the fuse box and handles things like the wipers, the other one is in the engine computer box and is the one that will leave you stranded if it fails since it has the start control relay and all the power distribution for the electronic modules.
__________________
The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
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