Hello every body

As writen in my presentation :
I 'm french, so my english was not very good
I buy a lovely Crossfire who won't start.
Before going a head with my problem, I want to confirm I'm not a professional, don't want to do money easy, and I'm the owner of the car (buying 2 weeks ago - paper could be show at at admin of this site)

To come back to the car :
Last professionnal owner have lose the only key.
They have send the ECU to carlabimmo to unlock key with emulator :



I will consider that they do their Job good.
Ignition barel have been change (no electronic inside key).
As ask by carlacb, Skreem unplugged.

What happens :
When I want to start, no thing, and after few second, cooling fan go to max speed.
For me, if skreem, electronic key problem, the crank must go, engine start
sec stop, and could do nothing after 3 tests.

In my case, cranks not go.
I will control, pumpe pump seems to go one few second.
I controle all the K40 box, all contact and all inside component = OK.

My first goal will be to test crank starter. Do you know where the relay is located ? Not seems to be inside K40 relay box ?

Thanks in advance to have read me ... and help will be friendly

Regards

Nicolas

 

Think I understand. When you turn the key to "Run" (not start), Do many dash lights come on ? Also what year is the car please ?

 

Thanks
Yes, I put the Key, light of the dash comes (i will do a picture this WE). When I go to last Ignition position, no rotation of the engine. Just fan starting few second later
I will check again, but I think I heard the fuel pump few second.

Car was born a nice day of 13/11/2003
I forgot to tell I test 2 batteries = same result

Test of the K40 :


(I have 2 K40 with car, one original I think, and one news MB)

My first idea is to test what not go on : starter + his relay

Thanks

 

Wrap a rubberband around the middle relay (engine control relay) and try to start the car.
Does it start?

 

Have you read the "No Start" thread ? The 04 service manual with wiring diagrams is available for download but I forget where. Could someone provide a link please ?

 

Thanks tighed1
I will do the test with rubberband. i same time I will look if they move or not (in labo test, all works + relay 3 and 4 in same time).
Relay engine (middle relay) give electric power to witch component ?
=> test will be perform tomorrow I hope. At latest, saturday morning
Thanks for your how to repair that I use to controle RCM (what I call K40 from other mercedes forum)

Thanks Padgett

I read this post before, and lot of other. For me, it s not so easy if post are very long to find good key in answer given.
i will try to find wiring diagrams.

Regards

Nicolas

 

I test the RCM relay, and as you all told me, hand pushing centered relay.
In each case, starter not launch.

Relay seems to be OK :
12V on one side of the relay. When we put the key, 3 relay move and one come back after few second (relay pump). I've got 12V on the other side of the relay after they have been activated. For me all seems to be OK in this side.

I have download service manual with all diagrams ... thanks for the documents.

I think I've RCM issue, but problem not come from this part (I 've got two with the car, one new from 2021 and test = same with both)

On the other hand, I do a test with Delphi diag auto.
I've got P0453 error = FUEL TANK PRESSURE SENSOR CIRCUIT HIGH
I will look if this error could stop launching.

Regards

Nicolas

 

At this point I would check for power (trouble light is fine) to the solenoid and starter (when key in start), either could be bad and not set a code.If no power will just have to trace.

As for the P0453, I'd clear (erase code) and see if it comes back, should not prevent starting.

 

nicolas-e63. This may help you. The Pulse Module has two relays in it . One of which sends the start power to the starter. It is located in the fuse box on the opposite side of the car from the RCM and it is under the black plastic that holds the fuses. You must pry the top of the fuses up to see the pulse module. Click here for more info; Pulse Module

 

And here is one on the starter if it comes to that Starter removal

 

No. I had P0453 for at least a MONTH with my first Roadster, that just stops you from passing a USA emissions test. THe car will run fine.

 

Hello

Thanks Pizzaguy for your confirmation. Defautl keep after erasing. From your answer, I will not lost time on it (at this time).

Thanks Zip 439. Yesterday Evening, after watching wire diag, and look the car, I found the pulse modul, without be sure it was this.
With you link, I'm now sure and could check tension in this relay.
If I'm right, I could launch starter when I'm on RUN position key + engage this relay :




Thanks Paggett to for your help.

Yesterday evening, I remove look barrel to control it. It 've been change before car stop starting. To be sure, I decide to controle it (will be done this evening).

Service manual was a dream and nightmare in same time (english ...)

Thanks to all.

 

Try to test ignition switch
Found this page 8w.10.9



What I have (Continuity test)
* Off : pin 5 7 + 2
* ACC : pin 5 7 + 2 + 3
* Run : Pin 5 7 + 1 +3 + 6
* Start : Pin 5 7 + 1 + 3 + 4
Wiring diagram I found not totally confirm I'm Ok but seem's to be OK

Last thing I could notice. I don't have on my car the little black switch on the ignition :


Thanks to all

Nicolas

 

Starter test in pulse module :
Ignition on "on/run"
Starter turn very fast, but not starting...
I think in this position engine must start.

Afraid ECU error or something said to ECU not go.... I will continue my check

Test wit / without Skrem - with / without emulator inside ECU = same ...

Regards
Nicolas

 

"Starter turn very fast, but not starting" - is the fan belt moving ? "very fast" usually means the bendix did not engage.

 

The bendix engage and motor turn ... but no ignition or benzine (??)...
I think ECU told to the car to not start.

All rest of the car seems OK :
I heard the fuell pump few second
All electric seems to works (windows, seat, ligth etc ...)...

Do you know what the ignition missing switch I have (circled in red on the net above picture) ? What does this "key in ignition switch" block ? Do my problem come from this. Perhaps, I could do bridge with a wire or add a switch on the connector ?

Thanks

Nicolas

 

Amazon has ignition testers.

 

Dear all
do you know compatibility on ecu
mine :

one found sell on the net :

 

Booth référence are very very close.
the ecu found was an automatic gear box.
mine was manuel.
could work ???
thanks to all
Nicolas

 

Dear all
I order new ECU with key, skrems.
i will let you known if works.
In same time, i will look for my Ecu. I think Car Lab immo do a mistake during ecu virgin eeprom.
Regards
Nicolas