C6 random intermittent electrical BCM issues
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Joined: Sep 2006
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From: Pearland TX
C6 random intermittent electrical BCM issues
I have a 2008 very clean LS3 with 31K miles. It was a "water damaged" car and had 17K miles with damaged/ recovered title when I got it for cheap. It runs like a watch and perfect in every way... except- the park shift lock solenoid (good solenoid) does not get juice until about 30-120 seconds of having your foot on the brake. Then all the sudden "click" (sound of solenoid engaging) then OK.
Next issue now. 2 years ago, can't connect to computer port (ECM) for inspections, etc. Connect ANY scanner and SOMETIMES, LOCK symbol sometimes comes on and car goes into a "limp mode" won't shift gears. Solution- RANDOM: turn car off. Click FOB to lock and unlock a few times. Clears- PERFECT - for a while. Or just wait 10 minutes for LOCK (yellow security lock on left lower side of cluster, BTW). ALSO of note, when this happens, the shifter lock solenoid can be heard clicking on and off.
Now it has gotten worse. Lock symbol appears RANDOMLY like a turn to the right under acceleration may cause this. Or going from Drive to reverse and back with a little acceleration. Car shuts down and won't start, door solenoids stick. Can't shut doors (or open). ALL gauges ZERO out. Try to start and NADA, ZIP except light ACCY in push start button light. SOLUTION: lock/ unlock repetitively with key FOB. (Door lock unlock buttons do not appear to respond. And if the door is open, the door solenoids (driver and passenger) are in CLOSE position and an attempted door close and BAM! strike pin HITS the closed solenoid captivating C latch.
There is a loose ground SOMEWHERE! Anyone know where it might be? Or BCM/ and or ECM going bad- corroded connectors from Hurricane Sandy flood damage... car was partially submerged. ECM/PCM or whatever you call it is down low behind passenger side fender which makes it appear to be a pain it the butt to get to it. But! maybe I should start there. Disconnect battery and pull the connectors and inspect for corrosion? ARE THERE ANY MULTI JUNCTION GROUND POINTS that are easier to get to that may cause random electrical issues?
Next issue now. 2 years ago, can't connect to computer port (ECM) for inspections, etc. Connect ANY scanner and SOMETIMES, LOCK symbol sometimes comes on and car goes into a "limp mode" won't shift gears. Solution- RANDOM: turn car off. Click FOB to lock and unlock a few times. Clears- PERFECT - for a while. Or just wait 10 minutes for LOCK (yellow security lock on left lower side of cluster, BTW). ALSO of note, when this happens, the shifter lock solenoid can be heard clicking on and off.
Now it has gotten worse. Lock symbol appears RANDOMLY like a turn to the right under acceleration may cause this. Or going from Drive to reverse and back with a little acceleration. Car shuts down and won't start, door solenoids stick. Can't shut doors (or open). ALL gauges ZERO out. Try to start and NADA, ZIP except light ACCY in push start button light. SOLUTION: lock/ unlock repetitively with key FOB. (Door lock unlock buttons do not appear to respond. And if the door is open, the door solenoids (driver and passenger) are in CLOSE position and an attempted door close and BAM! strike pin HITS the closed solenoid captivating C latch.
There is a loose ground SOMEWHERE! Anyone know where it might be? Or BCM/ and or ECM going bad- corroded connectors from Hurricane Sandy flood damage... car was partially submerged. ECM/PCM or whatever you call it is down low behind passenger side fender which makes it appear to be a pain it the butt to get to it. But! maybe I should start there. Disconnect battery and pull the connectors and inspect for corrosion? ARE THERE ANY MULTI JUNCTION GROUND POINTS that are easier to get to that may cause random electrical issues?
Last edited by ctap22; Oct 12, 2019 at 11:12 AM.
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Go back to the main forum page:
https://www.corvetteforum.com/forums/
Now start to slowly scroll down until you see the generation of your Corvette. C6 Corvette, 2005 - 2013 section:
https://www.corvetteforum.com/forums...-2005-2013-14/
Got a technical question about the C6 Corvette? Use the C6 Tech/Performance section:
https://www.corvetteforum.com/forums...rformance-101/
Thank-you
