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ECU cooked or something else?

Snoozer

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Just finished the reassembly of my ve wagon after replacing the chains.
I disconnected the battery at the beginning of the job about 3 weeks ago, and upon reconnecting for start up everything looked fine. Dash illuminated etc but the date did the Delorian manoeuvre and went back to June 2009...
I hit the key and nothing much happened. Nothing cranked, few lights flashed, few ticking noises and then fizzled out like a flat battery.
I checked the battery and it's throwing just a smidge under 13v. I put the OBD2 on and no codes and connected to the ECU just fine.

Anyone know what's going on?
 

greenacc

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Tried jump starting it just in case?
I'd try turning it over by hand with a breaker bar first just to check it turns over and isn't jammed.
 

Snoozer

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Jumped it at the time but it gave me nothing.

Have now had the charger on for a few hours and showed just over 13v and it started, however it wasn't happy!
I had turned it over by hand a few rotations after assembly without any interference, but it popped and farted for about 30 seconds before slowly coming to a slow stop. OBD2 shows PO300 and now won't crank. faaark!!
 

Snoozer

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In addition to the clock/date being wound back a decade, I just noticed the avg fuel consumption on the dash reads 99.9 l/100 and the airbag fault light has come on also.

I'm almost certain now the issue is in the ECU. Will a reset likely fix it given that it's essentially been 'reset' by having the battery disconnected for an extended period?
 

07GTS

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once the battery is disconnected for a period of time it will all go back to the start clock/date doing that is normal and average fuel is because its cranked and idled for a minute and stopped without and km done so its at max usage, that code is just the misfire code so check everything make sure its all plugged in properly
 

Snoozer

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Interesting on the fuel consumption, but it makes sense I guess.
Something is amiss for sure. I turned the climate control off after noticing it was on at start up. I cranked it again and the fans can back on for a second then switched off. I tried cranking again and then the airbag light came on, so I just walked off....
I'm going to leave charger on overnight and check the connections tomorrow and try again. Hopefully it's something h simple.
Is there a KAM in the VE ECU? Could that have wiped causing it to 'relearn'?
 

07GTS

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prob just need a fully charged battery, see what the volts is like when cranking or using load as thats when u will notice if its good or not, these can do odd things when the charge is low
 
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