ECU no start nightmare
Hi purchased an 1998 mercedes clk320 and within 10 miles the car suddenly
died. After a couple tows and the inability of mercedes licensed mechanics
to diagnose mainly due to the ecu not spitting codes I got it home
determined it to be a faulty ecu. Opened it up and sure enough there was
actually burn marks on the case. I sent the unit off and had to wait a month
to receive the unit. Plugged it in and the car run excellent. There were 3
issues abs esp lights remained on, car sometime wouldn't shift to 5th gear
and said I had a faulty brake or tail light one was a little dimmer. Three
weeks later the car wouldn't start and had all the ecu symptoms of fan on
high, key turned, all lights and equipment operated, when jumped starter turn
and fuel pump operated. I purchase two donor ecu's and took immobilizer
from my original and installed in a new one. When I tried to start the car I
have these symptoms.
The symptons are:
There is plenty of voltage from battery
If I turn ignition quick there will be a click and almost feel like it is beginning
to engage starter. Turned slowly there is no sound. all lights etc work.
computer links to scanner but throws no codes. fan is back to normal. K40
and all fuses appear good. new brake switch installed. we tried a number of
reset procedures with no results. So here's a few thoughts.
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