C6 Z06 Battery Replacement - Update

Well, the Z is back over at the dealer. This time I went to the service manager and vented. He was "shocked". I hope so. Now the check engine
light is on and the traction control doesn't seem to be working. It has been one computer controlled device problem after another. I told him it's time to replace the computer and he said, "which one?" There's one for every system he said. I figured there was one that ran the whole car.
As I was checking the car in at the service desk, a "kid" (25 year old computer geek) came in and told us there was a new bulletin on battery draining problem. Then a couple of hours after I left the dealer they called to ask me what gear I parked it in. Well, it's reverse, which per Dad's post below, was only an issue in 2005.
I told them to keep the F**cking (I starred for Arnie) car all week and put the geek on it non stop as I'm pissed. Haven't heard from them today. I'll report as I know more.
Out, Ed
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column that causes the active handling to light up the DIC. Seems the wiring harness is to short to use the steering column adjustment to it's full up position when you get in/out. It pulls a connector apart just enough to cause arching and then enough carbon builds up to cause intermittent contact. Took me about 2 hours to take it apart and loosen up the tension and clean the contacts in the connector and then zip tie it so it couldn't pull apart. That has been 7 months ago and no more codes have been set, they were coming on ever time it was driven.
The last bulletin I saw on a dead battery problem was 3/23/07 and was due to a passive entry program problem.
Hang in there, it can get worse.............
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Ok, per Dad's earlier reply:
==================================================>While you're there ask them to check the parasitic draw., should beless than 25Ma. That is the standard for a fully charged 660 CCA battery to drop to 9.0 volts or less in 30 day in normal temperatures. It could be as bad a 250Ma and still start it in a week of inactivity. One amp will kill it in less than a day. NOTE--- this can be intermittent as a module wakes up with a stuck relay in the circuit.
If you have Onstar it gets worse, as its' modules wake up and go back to sleep repeatedly. If you do and have Lojac you are duplicating activities that may conflict.
===========================================================Ok, they say the parasitic draw is 0.44 mA.
I suggested they just need to replace the battery.
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will still start the engine after 15 days at a 44 mA rate. Was an extend reading made to see if any waking modules added to that reading. At nearly twice the normal parasitic draw I'd still guess there is a problem.
Just to cheer you on there is a notice in the diagnostic aids that says, "Do not turn the parasitic draw test switch to the off position with the engine running. Damage will occur to the vehicle's electrical system." They're talking about tool number J38758 not just any ol meter. This meter is hooked up in line with the negative terminal and the vehicle is then driven up to 30 minutes and all electrical items are to be used during that drive. A fused 10 A jumper is then place on the terminals on the meter when the engine is shut off and is required to go 1 minute without blowing. If it does blow then a search of all circuits is required.
Not really funny but the group writing this manual still calls an alternator a generator.
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Ok, got car back from Chevy dealer as follows:
J# 1 19CVZ ELECTRICAL
CUSTOMER STATES BATTERY GOES DEAD AFTER SITTING 4-5 DAYS. INSPECTED AND CHECK BETTERY WITH TESTER CHECK FOR DRAW IN STSTEM AT .40 AMP. WITHIN FACTORY SPEC'S. NO SHORTS IN STYSTEM AT THIS TIME. WORKING PROPERLY AT THIS TIME.
J# 2 35CVZ LITE LINE
CUSTOMER STATES CHECK ENGINE LIGHT STAYS ON CHECK FOR CODES # P-0420LOW CAT. EFFIENCY REPROGRAM COMPUTER
J# 3 45CVZ MISC CUSTOMER STATES TRACTION CONTROL INOP REFER TO LINE # 2
I took the car out Sunday after church to the closed office and warehouse area of town and drove the shit out of it. Got tires from 31 psi up to 35. Oil temp. up to 205. Strong brake smell. Hit 0.8 g's in a 360 loop in front of a fancy office complex. Traction control seems to be working. ABS functioning.
I know they didn't do a damn think about the battery problem. They also mentioned I may have to store my key fob's in a farther point in my house. Maybe I need to fabricate a lead box. And could be some drain from the Lojac, which they sold me.
They've had the same tech, the 28 year old computer geek, working on it each time. Maybe I need an old timer, if there's any left. I think I'll try another shop across town next time.
Ed
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I think you're on the right track looking for another dealer. The FOB in these cars is totally passive until you press a button either on the car or on the FOB. You can place the FOB 5 feet from the car and it won't be detected. You can try that by making sure it is locked, put the FOB 5 feet from the driver's door and try to get in. Once you get 3 feet away it makes no difference whether you're 5 feet or 50,000 feet away as long as you don't press a button on the FOB. Pressing a button on the FOB causes the FOB to use a high power signal that the car can relieve from hundreds of feet away. Clearly this dealer doesn't know how the FOB works.
Next the dealer wasn't telling the truth when he said the drain was normal. 400mA is WAY too high. At that rate a fully charged battery would be dead in less than 2 days. That is not normal. Now if that was a typo and the tech meant 40 mA, then a fully charged battery should last about 3 weeks. The allowable drain is related to the battery installed but the OEM battery should be in the neighborhood of 30mA at most.
Maybe it was a typo and it was 40mA and it still went dead in a short time. That means you have a bad battery. If the car sat on a lot for a while before purchase with the dealer charging it whenever someone wanted to see it, that will kill any battery in short order. It is the deep discharge and recharge that is death to batteries. Yes, these newer cars will drain a battery faster than the older cars did but a good battery fully charged should last for almost a month according to the shop manual.
I'd say the "did you park in reverse" was strike #1, FOB is too close is strike #2, and there's nothing wrong with the car going dead in a week is strike #3. Time to find a new dealer with a tech that can read the shop manual.
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Thanks for the input Dale.
On the FOB's, I have the DIC set to lock/unlock and set the alarm automatically. I can leave the fob in the house and go open the car door. If you have it set to honk the horn to verify, it honks when I'm about 60 feet away in an unobstructed parking lot.
I am going out right now and setting them the DIC to manual where I have to press a button to lock/unlock. You may have hit the nail on the head!!
They say they've checked the battery and it's ok. I'd have to think they'd just replace it if questionable to save shop time and rental car expense.
Ok, Dad, your turn.
On a side note, I talked to the salesman that sold it to me. I've bought a couple cars from him and he's a great salesman. Been with them like 18 years. Asked him if business had picked up. Said it was grim since the "B" word came out. I told him it was the only way to break the union. Chevy can't compete against Toyota paying and extra 10 bucks an hour for employees. And the no cost insurance for retirees. He said, "I don't get any of that stuff they do." He just happened to be holding a George Will article in his hand on the pending bankruptcy. The take was that the unions gave too much to Obama's election campaign for him to allow the bk. Hmmmmmmmm....
Thanks for the help,
Ed
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Are you sure it is locked and will still open with the FOB more than 3 feet away? That isn't right. I have mine set for autolock and 5 feet away it will not open. If you can really unlock with the FOB sitting in the house then your RCDLR (Remote Control Door Lock Receiver) may be faulty and may be the cause of your battery problem. The way it is supposed to work is you pull the door switch and the BCM (Body Control Module) asks the RCDLR if the FOB is at the door. The RCDLR send out a challenge signal which the FOB receives. The FOB then responds with its code which the RCDLR compares to the previously stored valid FOB codes. If there is a match the RCDLR tells the BCM it is ok to open the door. The FOB receiver that listens for the RCDLR challenge is very low power. If you aren't right beside the car the FOB will not hear the challenge and will not respond. If you are really getting an ok to open the door with no FOB nearby then either the door was never locked or the RCDLR is giving false validations to the BCM. I'm not sure that turning off the auto unlock will do any good if it is unlocking without the FOB nearby.
As an aside, the reason the FOB works from 100 feet way when you press a FOB button is that when you press the button on the FOB it is the FOB that is sending its high power signal without being asked by the RCDLR and the RCDLR has a large receiving antenna so it can hear the FOB from a long distance but the FOB can't hear the RCDLR from more than a few feet.
As far as the auto lock working after 60 feet, try this, with it set to autolock and beep, get out but stand right at the drivers door. It should beep with the same timeout (9 seconds). The autolock works on a timer after it senses the door shut and the FOB outside. As soon as it senses the door close and the FOB is no longer inside the car it starts timing. 9 seconds later, if the door doesn't reopen and you don't press unlock or lock on the FOB, it locks. It never interrogates the FOB again, just a fixed timeout.
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I'll investigate and report back tomorrow.
Thanks!
Ed
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