Join Date: May 1999
Location: Ontario, Canada
Feedback Score: 0 reviews
Coincidentally after starting this thread, here is a post I just read today from another source regarding the start stop system:
"A 2014 Malibu was brought in today with a complaint that the alternator needed to be programmed. The S.W. told me that the customer had the alternator replaced by an aftermarket shop for a low charge rate. The new alternator did not fix the problem and they told him to take it to the dealer as G.M. does not give aftermarket shops the ability to program the new alternator. I wonder where he got that idea....must be the secret codes I keep hearing that dealer techs only have access to :0
I asked the S.W. to contact the customer and find out what his actual complaint was. It seems that if he doesn't use the vehicle for a week or so, it cranks slowly and the other shop told him the charge rate was low due to a bad alternator. This is a dual battery start/stop system. it seems many people are confused as to how it operates....let's take a look at it.
All pictures are with the engine idling. First, let's check the voltage at the battery. Ground lead is connected to the negative battery cable.
[2014 Chevrolet Malibu LS, BATT/Charging/Starting Photo] Well, I see his problem. This is with no loads on the system. We need to look a little farther before condemning any components. Let's check charging voltage from the alternator output side...
[2014 Chevrolet Malibu LS, BATT/Charging/Starting Photo] So the alternator is charging 13.86 volts but the battery is only getting 12.39 volts. Where did the voltage go? First, check voltage drop between the positive terminal and the Dual Battery Control Module. (DBCM)
[2014 Chevrolet Malibu LS, BATT/Charging/Starting Photo] Looks OK there. Now test between the positive battery terminal and the DBCM input terminal.
[2014 Chevrolet Malibu LS, BATT/Charging/Starting Photo] There it is. Not an uncommon problem. There is almost a 1.5 volt drop across the DBCM contacts. Let's replace the DBCM and check battery charging voltage again...
[2014 Chevrolet Malibu LS, BATT/Charging/Starting Photo] That's more like it. Our battery should stay charged now. Don't forget to perform a battery sensor relearn before releasing the vehicle. Also, start/stop may not function until the vehicle sits for at least 3 hours unmolested."
2007 F350 SRW 6.0L Auto, 3.73LS, 172"WB 4x4. Viper Alarm/RS, WD pillar Guages,AutoEnginuity, 100gal polished alum fuel tank.
All Sold: 99.5, early03 , 2004 - all were 172" wb 4x4 lariat's.
My Worklog - *Updated 8/18 with Edge CTS2 install click here =>*:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.