desmofab
Senior Member
- Joined
- Aug 28, 2019
- Messages
- 47
- Reaction score
- 13
- Location
- France
- Your Mercedes
- CLK W209 / 2006 / 320 CDI (OM642) + 722.9
Hello all,
For the second time in two months my car let me on the side of the road.
I have been riding more than 1000 km in one week and for the final step of my trip it was impossible to start the engine.
On the dashboard, I do not have the gearbox information like (P R N D). I used an autocom and faults code are the following : P1856, P2211, P1221.
So I changed the gear selector, now the car is able to start but the car is staying on the first speed. P2211, P1221 are remaining. To test the TCM I unplugged the wire one the gearbox (722.9) and I got the same symptoms but with the fan running a lot in addition.
As an information, I bleed the oil of the rear tranmission and the gearbox one month ago(2000km).
From WIS electical diagram I made some continuity tests. And everything seems ok from/out N15/3 and N15/5
I also checked the K relay into the front sam and I made a swap with the horn relay... Without succes. Still no gear displayed on the dashboard !
I also checked the can bus X63/4.
Now I removed the TCU but I still have some doubt about the root cause... maybe I missed something..
Do you have any advice ?
Thanks
For the second time in two months my car let me on the side of the road.
I have been riding more than 1000 km in one week and for the final step of my trip it was impossible to start the engine.
On the dashboard, I do not have the gearbox information like (P R N D). I used an autocom and faults code are the following : P1856, P2211, P1221.
So I changed the gear selector, now the car is able to start but the car is staying on the first speed. P2211, P1221 are remaining. To test the TCM I unplugged the wire one the gearbox (722.9) and I got the same symptoms but with the fan running a lot in addition.
As an information, I bleed the oil of the rear tranmission and the gearbox one month ago(2000km).
From WIS electical diagram I made some continuity tests. And everything seems ok from/out N15/3 and N15/5
I also checked the K relay into the front sam and I made a swap with the horn relay... Without succes. Still no gear displayed on the dashboard !
I also checked the can bus X63/4.
Now I removed the TCU but I still have some doubt about the root cause... maybe I missed something..
Do you have any advice ?
Thanks