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- 31
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- Netherlands
Hi everyone,
I'm about to start pulling my hair out. About a week ago, my L322 began to make all sorts of clicking and clanging sounds around the chain on bank 2. I pulled all the belts to confirm it was the chain and not one of the other components. It was still the chain. After that, I pulled the valve covers and figured out it was a lower chain tensioner that got stuck. We ran the car with valve covers off to verify that it was the tensioner, the car ran just fine (solely on distribution, no auxiliary pumps, alternator, or anything like that, so I know it ran on pure battery). Engine was running no longer than 5-10 seconds at a time in that configuration, 'cause well, you get an oil bath
So, I replaced the tensioner. Chain tension seemed much better, and I wanted to crank the engine again to see whether it really helped, only to see that I got the HDC, ABS, DTC, and all those "usual" failures, but on top of that - the engine doesn't even try to crank.
My first thought was - that the battery drained past 8.5V - EMS ECU wouldn't respond. Disconnected the battery, left it on a charger overnight, and am getting a 12.3V from it now - nothing. What's more interesting is that none of my diagnostic tools (I have a large variety of those) is capable of connecting to and reading out EMS ECU. All the fuses, including the main 50/100A ones, are good. The steering column unlocks, so I'd assume immo ECU is also operational. I can read out everything but engine ECU.
Could it go bust all of a sudden? What am I missing? Power lines seem to get power all over the place where I could reach. I tried disconnecting and reconnecting every ECU (apart from LCM, but that one's readable, so dunno if that would help anything). I'm gonna try and feed the starter 12V to see if the engine wants to crank in general, but if the engine ECU is unreadable, I'd assume it will crank but still won't start on key turn.
Does anyone have any ideas? Or am I SoL and just need to get a new ECU?
Thanks,
Vlad
I'm about to start pulling my hair out. About a week ago, my L322 began to make all sorts of clicking and clanging sounds around the chain on bank 2. I pulled all the belts to confirm it was the chain and not one of the other components. It was still the chain. After that, I pulled the valve covers and figured out it was a lower chain tensioner that got stuck. We ran the car with valve covers off to verify that it was the tensioner, the car ran just fine (solely on distribution, no auxiliary pumps, alternator, or anything like that, so I know it ran on pure battery). Engine was running no longer than 5-10 seconds at a time in that configuration, 'cause well, you get an oil bath
So, I replaced the tensioner. Chain tension seemed much better, and I wanted to crank the engine again to see whether it really helped, only to see that I got the HDC, ABS, DTC, and all those "usual" failures, but on top of that - the engine doesn't even try to crank.
My first thought was - that the battery drained past 8.5V - EMS ECU wouldn't respond. Disconnected the battery, left it on a charger overnight, and am getting a 12.3V from it now - nothing. What's more interesting is that none of my diagnostic tools (I have a large variety of those) is capable of connecting to and reading out EMS ECU. All the fuses, including the main 50/100A ones, are good. The steering column unlocks, so I'd assume immo ECU is also operational. I can read out everything but engine ECU.
Could it go bust all of a sudden? What am I missing? Power lines seem to get power all over the place where I could reach. I tried disconnecting and reconnecting every ECU (apart from LCM, but that one's readable, so dunno if that would help anything). I'm gonna try and feed the starter 12V to see if the engine wants to crank in general, but if the engine ECU is unreadable, I'd assume it will crank but still won't start on key turn.
Does anyone have any ideas? Or am I SoL and just need to get a new ECU?
Thanks,
Vlad
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