65GGvert

I guess not much changed between the 2004 date of the original post and today.

reath1

I also had this problem when changing alternators. I am not 100% positive how the system is circumvented, exact wire configuration, but it looks fairly simple to get around the "charge system fault" message when changing alternators. The alt I purchased from DC Power has a pigtail that is actually missing one of the original wires and has a jumper from one to the other on the 4 wire plug. I am not near my car now but from what I remember it's not really complicated. I have a 300 amp alt charging 3 batteries through a Perfect Switch power gate. By nature I get the charge system fault at initial start-up for about 5 seconds then it's gone. This is caused by the switching fets in the isolator before it sends a "exciter" signal to my alt.

I can only assume that the so called "replacement" alts that are sold for the car are not set up internally for that extra wire on the C5 pig tail. And I believe that is where the problem comes in.

lionelhutz

From what I have been told it's very easy to get rid of that error with HP Tuners.

Porxter

So, I know this is an old thread, but I wanted to add a couple of thoughts.

First is the fact that even an AC Delco “Factory Rebuilt” alternator causes the same code to set. I put the following alternator in my 200,000-mile 99 C5 a few nights ago and immediately got the Charging System Fault message. (The reason I replaced it was I suspected the diodes were allowing a steady discharge of the battery while parked.)

This is what I put in it:
AC Delco Professional Rebuilt PN 334-1280





I read some of the other threads on this issue and noted the ability, with the proper tools, to program the applicable module to stop reporting the code. So I can only assume that this is a common practice at dealerships any time they install a rebuilt alternator, because I really doubt they repair the original alternators.

The “fresh” alternator also doesn’t show a cruise charge of more than 13.8 volts on the DIC, and when I put a full load on it yesterday on my way home from work (High Beams, High Speed A/C, and rear defroster all on at the same time) it dropped to 13.1/13.2

Last night I verified with my Fluke 87 meter that the diodes are in fact bad in my original, so I ordered a new bridge rectifier and voltage regulator for my original alternator. Here is what I found for a source:

http://store.alternatorparts.com/ipr...lternator.aspx

http://store.alternatorparts.com/part-m526.aspx

Good luck to everyone with these alternators.
Steve

dakilner

Porxter,

I hate to be the bearer of bad news however, you are getting that message because you put an aftermarket alternator in your corvette, not the OE GM alternator. AC Delco has two different lines of parts: GM OE Parts and AC Delco "Professional" Parts (I use this term quite loosely). The GM OE Parts are provided by the original manufacturer or GM's designated replacement supplier that has been through all of the engineering and review process. AC Delco's "Professional" line is an Aftermarket supplier that meets AC Delco's price and lesser quality standards for this line. This is why YOU MUST be careful when going to either a dealership or an aftermarket parts store, most times they either do not know or do not care about this difference and do not tell the customer (Also the dealerships have a greater margin, as well as parts stores, on the "Professional" parts). There are a few ways to tell what you are getting for example most internal OE GM part numbers DO NOT start with 19XXXXXX , these are normally indicating an aftermarket "equivalent" part (I say normally because there are some OE parts that start this way). Also the AC Delco website will tell you which parts are which:

ACDELCO GM ORIGINAL EQUIPMENT
GENERATOR ASM
Part Number: 10316182
Product Notes:
Alternator
110 AMP GEN(K63) ; VALEO IR & IF ; AMPS 110 ; 1 Per Veh
Per Vehicle: 1; Years: 1997-2002
Vehicle List

GENERATOR ASM
Part Number: 10353440
Product Notes:
Alternator
HOLES NOT TAPPED-BRACE NO LONGER REQUIRED ; VALEO IR & EF, 14V ; 6; Groove Pulley ; AMPS 110 ; 1 Per Veh
Per Vehicle: 1; Years: 1997-2002
Vehicle List

CONNECTOR,GEN
Part Number: PT1136
Product Notes:
Generator Conn
4-WAY FEMALE BLACK
Per Vehicle: 1; Years: 1998-2004
Vehicle List

ACDELCO PROFESSIONAL
REMAN ALTERNATOR (VALEO IF 110 AMPS)
Part Number: 334-1280
Product Notes:
Reman Alternator
Family VA-IF, Unit MFR VA,Amps 110, Pulley 6S, Fan IF, REG IR, Clock; 1:00; 334-1280; 6Y1; 0050A, 1 Per Veh
Per Vehicle: 1; Years: 1997-2000

This is the reason that i tell most people not to but AC Delco parts from advanced auto parts - all are the "Professional" Line. KOI auto parts is one of the few parts stores left that carry the OE GM AC Delco line.

Another Example: Spark Plug wires, all AC Delco "Professional" Wires start with a "9" where OE does not:


ACDELCO GM ORIGINAL EQUIPMENT
WIRE KIT,SPLG
Part Number: 748CC
Product Notes:
Spark Plug Wire Set
BLACK LEADS ; 1 Per Veh
Per Vehicle: 1; Years: 1997-2003
Vehicle List

SHIELD,SPLG WIRE
Part Number: 8006
Product Notes:
Spark Plug Wire Shield
Per Vehicle: 1; Years: 1997-2002
Vehicle List

WIRE,SPLG
Part Number: 348S
Product Notes:
Spark Plug Wire
1; Style 8DDD, 7.8IN, Black LEAD; 8 Per Veh
2; Style 8DDD, 7.8IN, Black LEAD; 8 Per Veh
3; Style 8DDD, 7.8IN, Black LEAD; 8 Per Veh
4; Style 8DDD, 7.8IN, Black LEAD; 8 Per Veh
5; Style 8DDD, 7.8IN, Black LEAD; 8 Per Veh
6; Style 8DDD, 7.8IN, Black LEAD; 8 Per Veh
7; Style 8DDD, 7.8IN, Black LEAD; 8 Per Veh
8; Style 8DDD, 7.8IN, Black LEAD; 8 Per Veh
Per Vehicle: 8; Years: 1997-2003
Vehicle List

WIRE HARNESS ASM-IGN COIL
Part Number: 355S
Product Notes:
Ignition Coil Lead Wire
2 Per Veh
Per Vehicle: 2; Years: 1999-2004
Vehicle List

ACDELCO PROFESSIONAL
WIRE KIT,SPLG
Part Number: 9748CC
Product Notes:
Spark Plug Wire Set
1 Per Veh
Per Vehicle: 1; Years: 1997-2002

Sirk17

I just ordered this part for my manual 2002 z06 that had the French made Valeo part in it....did i get the correct one?


ACDELCO GM ORIGINAL EQUIPMENT
GENERATOR ASM
Part Number: 10316182
Product Notes:
Alternator
110 AMP GEN(K63) ; VALEO IR & IF ; AMPS 110 ; 1 Per Veh
Per Vehicle: 1; Years: 1997-2002
Vehicle List

Trios

dadaroo

From 97-2000 they used a 110amp one with P/N 10246634

From 2001-2002 on Manual cars they used the 110amp 10246634 also.

From 2001-2002 on Automatics they used a 110 amp 10316182 since they used a decoupler.

Trios

Does nobody notice that this thread was started when the C5 was 'Current Generation?'

Well, pretty close at least. I suppose the 2005's were out then.

Let the zombie thread die.

Sirk17

Nobody cares how old it is. Clearly this information is still being confused. I will post a picture of the part number and part that I receive. I found a local OEM remanufactured so I will be returning the new one.

93Polo

For an '01 Cultrag lists:
Manual 10316182
Auto 10353440

TorqueWinsRaces

Why does an old thread bother you? It's relevant information. There are still a lot of C5 cars out there and they are getting older and experiencing problems. Like mine. Which is why I'm here, reading and participating in this thread. Which is neither dead nor irrelevant.

Juhatee

In this thread it is stated that you could get rid of the code with HPtuners. I didn't find this dtc from the software's list so it can't be disabled.

I also have a newer 2004 (automatic) 140 A alternator with decoupler in my (manual) '99 so I would like to know a way to get rid of the code without having to replace a good alternator.

lionelhutz

Try opening the system settings and uncheck the F and/or L terminal options. The L terminal will still work to energize the alternator but the terminals won' be monitored once they are unchecked.

Chicago1

I remember when I had this issue. It was because they gave me a alternator for a auto.

Juhatee

I finally tested this. Unfortunately I still get that fault text even if I put both L and F terminal monitoring of with hptuners.

corvet786c

I just bought a new alternator from autozone and now get this message, frankly it doesn't bother me. I would rather have a strong and reliable alternator @ 14.9 volts, then be stranded from the valeo because it was weak and old. I now have ample voltages at the battery 14.4 normal cruzing and drops to 14.29 with lights on. I would get 13.5 volts charging with lights on at the battery on the original valeo. I went thru 2 batteries with the valeo alternator because the charge was not enough, when resting. My ignition switch was fine and starter terminals were all clean. GM should of put an higher output alternator in their from the start. just my opinion.