HELP!! dead in the water
Thread Starter
Pro
Joined: Feb 2006
Posts: 718
Likes: 7
From: Jacksonville , NC
HELP!! dead in the water
Completed the install of my Dewitts short rad and SPAL fans. Started up the vet and checked on fluids and temps. All good. Took her out for a quick test drive and all was normal. Came back to the house and parked outside the garage. Put the window valet back into the OBD II port and checked the operation...all good. Went out to move the car and started right up but got Reduced engine...Low Fuel...and a few other messages on the DIC... Went to pull codes and PCM. no com..TSC..no com BCM no com HVAC no com... radio no com. all gages except the volt meter were dead. Funny thing is the car was running and definitely not in reduced engine mode. Shut the car down and pulled the window valet out. When I went to start the car. nothing...Zilch....nada.. no start and the same DIC messages Could the Window valet have caused this? Im open to any and all help. O2 vert with mods listed in my sig. I do have a TECH II but with no comm Im not sure it helps.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Check your battery voltage first and then make sure the connections are tight...
I would disconnect the battery for about 20 minutes and then reconnect also, if it has good voltage...
A fully charged battery should be 12.6v or more.
If the battery is
12.5 = 85% charged
12.4 = 65%
12.3 = 50%
12.2 = 35%
12.1 = drained
I would disconnect the battery for about 20 minutes and then reconnect also, if it has good voltage...
A fully charged battery should be 12.6v or more.
If the battery is
12.5 = 85% charged
12.4 = 65%
12.3 = 50%
12.2 = 35%
12.1 = drained
Last edited by 73Corvette; May 9, 2015 at 07:56 PM.
Thread Starter
Pro
Joined: Feb 2006
Posts: 718
Likes: 7
From: Jacksonville , NC
Check your battery voltage first and then make sure the connections are tight...
I would disconnect the battery for about 20 minutes and then reconnect also, if it has good voltage...
A fully charged battery should be 12.6v or more.
If the battery is
12.5 = 85% charged
12.4 = 65%
12.3 = 50%
12.2 = 35%
12.1 = drained
I would disconnect the battery for about 20 minutes and then reconnect also, if it has good voltage...
A fully charged battery should be 12.6v or more.
If the battery is
12.5 = 85% charged
12.4 = 65%
12.3 = 50%
12.2 = 35%
12.1 = drained
Putting it on the CTEK for the night and will check in the morning.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
My guess is you battery is good... You have one of a couple of things that are most likely causing a corrupted SERIAL DATA BUSS issue. I bet that you have also lost control of the power windows from the drivers side also
OR
Your BCM got wet or damp from HVAC condensate water flood back. Check the carpets and the pad under the carpet for dampness.
If the problem isnt wet or damp BCM, there are TWO thin connectors to the LEFT of the BCM. Find the ones with FOUR wires and pop the TOP off the connector and see if you regain comms
Bill
OR
Your BCM got wet or damp from HVAC condensate water flood back. Check the carpets and the pad under the carpet for dampness.
If the problem isnt wet or damp BCM, there are TWO thin connectors to the LEFT of the BCM. Find the ones with FOUR wires and pop the TOP off the connector and see if you regain comms
Bill
Thread Starter
Pro
Joined: Feb 2006
Posts: 718
Likes: 7
From: Jacksonville , NC
Thanks all for the input, checked the battery after a night on the CTEK and it was bad. Go figure. Good one day (hour) bad the next. Dropped in a new Optima red top and all is back to normal. I really wasn't looking forward to playing hide and seek with the serial buss, I just want to drive the car. Thanks again for the input.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Thanks all for the input, checked the battery after a night on the CTEK and it was bad. Go figure. Good one day (hour) bad the next. Dropped in a new Optima red top and all is back to normal. I really wasn't looking forward to playing hide and seek with the serial buss, I just want to drive the car. Thanks again for the input.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski