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2016 E350 engine cranking, not starting after minor crash
After a minor front crash which broke front bumper, radiator, condenser and left headlight, my car won't start. It cranks fine but just won't start.
I pulled the following codes from the ECM:
P209400 - actuator exhaust camshaft cylinder bank 2 short circuit to groundP209000 - actuator exhaust camshaft cylinder bank 1 short circuit to groundP209200 - actuator intake camshaft cylinder bank 2 short circuit to groundP208800 - actuator intake camshaft cylinder bank 1 short circuit to groundP062C00 - internal control unit fault in monitoring function for vehicle speedP010711 - imtake manifold pressure sensor short circuit to groundP007300 - outside temp sensor short circuit to positive
Electric Power Steering:
B210F00 - Input "circuit 30" has a malfunction
There's also a "stored U140900 - An implausible left front wheel speed signal was received" error code in the TCM & ISM shift modules.
Is there a pyrofuse in this model?
I thought the pyrofuse would disable cranking too?
Or is there a "disable ignition after crash" in this model?
I thought it also disabled cranking.
I have checked and found no damaged harness.
I'd appreciate any help pointing me in the right direction.
Pyro fuse is only to cut off power to starter motor, nothing else.
The problem you are having is not related to pyro fuse.
What scanner are you using ?
Some DTCs are kind of wide spectrum description and we can not take its meaning literally, example P209400 - actuator exhaust camshaft cylinder bank 2 short circuit to ground
It may not be actually short to ground, but could be loss of power.
Now, have you check all 5 fuses which your engine computer N3/10 neeeds to function ?
I am not at home now, so I can't access my PC.
Go to this post and download your M276 3.5 NA engine computer wiring diagram. Post #12 https://mbworld.org/forums/e-class-w...ml#post8850679
Fuse F27, F22, F23 and F24.
Below I marked red, I believe it is fuse F25. I know there is one fuse not stated in the ECM wiring diagram, but when you use the Front SAM wiring diagram,
you can find that fuse.
There's an option in Xentry to activate the engine after a collision. I think it's under "Adaptations" sub-menu. I don't know how this system works but it could save you some time to go to a shop that has Xentry or use the passtrough version if it is available in your region.
I bet you are not getting fuel. Cars have had auto fuel pump disable functionality after a crash since the late 80s. You need to find how MB does that and reset the fuel pump somehow.
Pyro fuse is only to cut off power to starter motor, nothing else.
The problem you are having is not related to pyro fuse.
What scanner are you using ?
Some DTCs are kind of wide spectrum description and we can not take its meaning literally, example P209400 - actuator exhaust camshaft cylinder bank 2 short circuit to ground
It may not be actually short to ground, but could be loss of power.
Now, have you check all 5 fuses which your engine computer N3/10 neeeds to function ?
I am not at home now, so I can't access my PC.
Go to this post and download your M276 3.5 NA engine computer wiring diagram. Post #12 https://mbworld.org/forums/e-class-w...ml#post8850679
Fuse F27, F22, F23 and F24.
Below I marked red, I believe it is fuse F25. I know there is one fuse not stated in the ECM wiring diagram, but when you use the Front SAM wiring diagram,
you can find that fuse.
I hope you are decent with DC electrical and has the tools to troubleshoot further
I checked and fuse 23 & 24 were blown.
A guide I have lists them as "Electrical connector for interior harness and engine wiring harness" fuses.
Replaced them & car starts & runs, as sweet as ever. Didn't have to do anything about the power steering. Error cleared & It worked as soon as vehicle started.
MC,
When any of the F23 and F24 fuses blow again, you have to dig into it properly.
Fuse do not usually blow unless overloaded or mild short or dead short.
Know your F23 and F24 consumers well, that will give you easier visualization if the crash had created any small cut on wire jacket which can be producing mild/dead short
at certain time or vibration. Flooded connector, say from coolant can also do havoc.
Here is what you need to do, I give you example for F23, and you do F24 on your own. I given you the link to the ECM wiring Diagram already.
First ID what is the splice or wire sharing as +12V supply to consumers of F23. Don't use ground (-) wire, always use the positive feed when tracing actual consumers of a fuse.
Follow to the next diagram to see what is the splice ID of Fuse 23. So we got Z7/38z1
Splice in MB wiring only gets that unique dot with a diamond square and no wiring path/run indicator, so you must find every label with Z7/38z1 on both wiring diagramsand imagined that they are all interconnected.
.
Now scan thru slowly the entire diagrams , both of them, for Z7/38z1
Look at the diagram legend for their names. These are Ignition Coils cylinder 1, 2 and 3 of BANK 1 ( Right side ) . Now we spotted 3 consumers already. Lets move on.
Now we got all the consumers, number 4th to 7th.
.
Each wiring diagram has legend, that is also telling you how many Z7/38z1 are PRINTED/EXIST on the said diagram. Here we have 3, so find all 3.
We did find all 3 of the Z7/38z1
So its done for this diagram, check the other diagram too.... well, there is none there. So we are good for F23 consumers.
.
.
===================================
Now you do F24. Later you make a list like I did, for future reference.
Below is based on my M276 3.0 Turbo, so its a bit different, but the general components are very much the same to how MB does the consumers grouping.
.
So, your M276 3.5NA F23 consumers assignment is exactly like on my car, your F24 you need to verify yourself.
So among these 7 consumers, which one of its positive feed wire get nicked and cause fuse to blow ?
That is your homework, when and if F23 blow again.
Have fun listing your ECM engine fuses "consumers".
Last edited by S-Prihadi; 10-13-2023 at 02:23 AM.
Reason: ADD INFO
MC,
When any of the F23 and F24 fuses blow again, you have to dig into it properly.
Fuse do not usually blow unless overloaded or mild short or dead short.
Know your F23 and F24 consumers well, that will give you easier visualization if the crash had created any small cut on wire jacket which can be producing mild/dead short
at certain time or vibration. Flooded connector, say from coolant can also do havoc.
Here is what you need to do, I give you example for F23, and you do F24 on your own. I given you the link to the ECM wiring Diagram already.
First ID what is the splice or wire sharing as +12V supply to consumers of F23. Don't use ground (-) wire, always use the positive feed when tracing actual consumers of a fuse.
Follow to the next diagram to see what is the splice ID of Fuse 23. So we got Z7/38z1
Splice in MB wiring only gets that unique dot with a diamond square and no wiring path/run indicator, so you must find every label with Z7/38z1 on both wiring diagramsand imagined that they are all interconnected.
.
Now scan thru slowly the entire diagrams , both of them, for Z7/38z1
Look at the diagram legend for their names. These are Ignition Coils cylinder 1, 2 and 3 of BANK 1 ( Right side ) . Now we spotted 3 consumers already. Lets move on.
Now we got all the consumers, number 4th to 7th.
.
Each wiring diagram has legend, that is also telling you how many Z7/38z1 are PRINTED/EXIST on the said diagram. Here we have 3, so find all 3.
We did find all 3 of the Z7/38z1
So its done for this diagram, check the other diagram too.... well, there is none there. So we are good for F23 consumers.
.
.
===================================
Now you do F24. Later you make a list like I did, for future reference.
Below is based on my M276 3.0 Turbo, so its a bit different, but the general components are very much the same to how MB does the consumers grouping.
.
So, your M276 3.5NA F23 consumers assignment is exactly like on my car, your F24 you need to verify yourself.
So among these 7 consumers, which one of its positive feed wire get nicked and cause fuse to blow ?
That is your homework, when and if F23 blow again.
Have fun listing your ECM engine fuses "consumers".
MC,
When any of the F23 and F24 fuses blow again, you have to dig into it properly.
Fuse do not usually blow unless overloaded or mild short or dead short.
Know your F23 and F24 consumers well, that will give you easier visualization if the crash had created any small cut on wire jacket which can be producing mild/dead short
at certain time or vibration. Flooded connector, say from coolant can also do havoc.
Here is what you need to do, I give you example for F23, and you do F24 on your own. I given you the link to the ECM wiring Diagram already.
First ID what is the splice or wire sharing as +12V supply to consumers of F23. Don't use ground (-) wire, always use the positive feed when tracing actual consumers of a fuse.
Follow to the next diagram to see what is the splice ID of Fuse 23. So we got Z7/38z1
Splice in MB wiring only gets that unique dot with a diamond square and no wiring path/run indicator, so you must find every label with Z7/38z1 on both wiring diagramsand imagined that they are all interconnected.
.
Now scan thru slowly the entire diagrams , both of them, for Z7/38z1
Look at the diagram legend for their names. These are Ignition Coils cylinder 1, 2 and 3 of BANK 1 ( Right side ) . Now we spotted 3 consumers already. Lets move on.
Now we got all the consumers, number 4th to 7th.
.
Each wiring diagram has legend, that is also telling you how many Z7/38z1 are PRINTED/EXIST on the said diagram. Here we have 3, so find all 3.
We did find all 3 of the Z7/38z1
So its done for this diagram, check the other diagram too.... well, there is none there. So we are good for F23 consumers.
.
.
===================================
Now you do F24. Later you make a list like I did, for future reference.
Below is based on my M276 3.0 Turbo, so its a bit different, but the general components are very much the same to how MB does the consumers grouping.
.
So, your M276 3.5NA F23 consumers assignment is exactly like on my car, your F24 you need to verify yourself.
So among these 7 consumers, which one of its positive feed wire get nicked and cause fuse to blow ?
That is your homework, when and if F23 blow again.
Have fun listing your ECM engine fuses "consumers".
I'll keep this in mind and check for the consumers when time permits. Thanks a lot. This is definitely useful info
09-25-2023, 03:03 AM
