I got a 2001 C5 and can't figure out why the traction button wont work.

I traced the wires (according to my repair software) from the button to the BCM and BCM to the PCM and to the EBCM still no go.The switch has continuity when depressed, ground is good.?

I get code C1293 H after some driving and at same time the active handling message.

I read somewhere that the EBCM had a gm software update was this one of the problems it addressed ?

Or is this one of the reasons the module needs replacing?

What controls most of the traction PCM or EBCM?

I gotta light em up once before i ship this car over sea's

Any Help greatly appreciated

 

The C1293 DTC shouldn't have any effect on the EBTCM that I'm aware of. It relates to the Master Cyl pressure switch. I had a 98 and it didn't have Active Handling "COMPETITION MODE". All it had was TC on or TC off. When the button is pressed on my 98, the little yellow light in the Speedo (fishtailing C5) lights up and you can roast the tires all you want. If you have a 2001 with Active handling, I believe you have to be STOPPED to get into Comp Mode.

My 02 ZO6 has advance AH and I can get into comp mode when ever I want, driving or stopped.

I had a ground problem with my 98 and the security light and TC lights would light up all by them selves when it felt like it!

The console wires are very fragile and often get pinched or cut. I would make sure there not grounded

Check out the ground cleaning sticky:

http://forums.corvetteforum.com/showthread.php?t=896875

It might help.

BC

 

Thanks for the reply Bill

I pretty much had the complete wiring harness out of this car do to engine fire almost a complete rebuild
The front end was sand blasted and all connections greased.So no ground issues

The button does nothing no light on dash nothing.

The light was on for a while due to a SWPS(would have been nice to know that before assembly )

Its also a convertible is there anything else that would limit the deactivation of TC ?

I,m gonna try to activate it now at the BCM

 

You probably thought of this..but one time I had my console apart I forgot to clip the button plug harness back in.

 

The 2001 MY is the first year with the "updated" system, you can put it in COMP mode while driving the car.

The 2001 Service Manual lists that C1293, when set, DISABLES the VSES (Active Handling) system. You should be getting a "Service Active Handling" message on the DIC, and the TC/AH warning light should be illuminated on the IP.

TC and ABS should still be functional.

Try clearing the C1293 using the buttons on the IP, and then see if:

A) The code comes back

B) With the code cleared are you now able to control the AH/TC system from your console?

 

Thanks for the replies

I have never been able to control AH/TC from the console, even when the codes are cleared.

I'm wondering is there is still air in the module and if that would cause an issue with the pressure switch or AH/TC?

I bleed as usual(gravity then 2man) brakes feel good but I heard somewhere that you need a gm tech2 scanner or ? to bleed the abs fully?

 

I'm still not sure what the problem is. All the EBCM functions are electronic

Do you have a failure on the DIC?

If you're moving overseas you need to fix any snags before you leave the US

Trust me, parts are expensive when you have to get them shipped and expertise is hard to come by.

 

The C1293 indicates that the brake fluid sensor is showing too HIGH a brake pressure (over 50 PSI) for 2 consecutive ignition cycles. Air in the system would probably get you a C1292 - brake pressure is LESS than 50 PSI, as air in the system would make it harder for the system to generate a high pressure.

You do need a Tech2 to command the ABS pump into operation to bleed the ABS, but to me it doesn't sound like air in the system.

I'd check the wiring to the brake fluid pressure sensor (BFPS). There are three wires to the BFPS. The BLACK wire is the BFPS sensor signal and should (Ignition ON - Engine OFF) be between 0.14 and 4.9 volts. The ORN/Black wire is the "Low Reference" wire and the GRY wire is a 5 volt "power" to the sensor. NOTE: Both the "Low Reference" (ORN/BLK)and the 5 volt (GREY) wire are common to the SWPS too. You may just want to check that those connections at the SWPS are good since you mention you recently replaced that.

If it is not a wiring issue you'll probably need to replace the BFPS located on the side of the BPMV pump.

Once you get the C1293 cleared, you'll have a better shot at fixing the TC issues as while the Service Manual says that code only turns off Active Handling, it may also affect TC.

 

I agree!! EXCELLENT write up! I have remover air from the system by applying the brakes HARD on wet/parking lots and roads. It will cycle the poppet valves i the BPMV and force the air out of the system.

BC

 

Dam this place rocks you guys are awesome. I don't know how you could make a newbie feel more welcome to your forum here.


Holy **** thanks for talking the time on the detailed reply



There's a good idea thanks

The problem was I could not do figure8 smoking donuts
I'm not moving over sea's I export from Canada to Germany and other places too mostly repaired insurance write offs.
I've been restoring cars since I was 13(completely rebuilt my first motor when I was 15) and operated my own automotive business since I was 21.
I'm new to Corvette's (dam addicting things ) this is my first almost restoration. I just had so many bugs due to theft of components and roll over tearing parts out deadlines etc. I could not relax my mind enough re diagnose.

I've never had nothing nice to say about GM wiring design ever and here we go again, they should really follow the Germans ( long story on all the design flaws i encountered)

So I went out and exposed the BCM and manually grounded the TC BRN/WHT wire.
it displayed "Traction control off" I was like WTF I tested all the wires for continuity. So another look a the wiring diagram shows "TWO" BRN/WHT wires to the TC button WTF was the designers smoking that day?
When I bought the roll over parts car someone attempted to steal the SRS module and cut the console harness in the process, so I must have soldered the wrong BRN/WHT wires together I pulled the wires out of the plug with a pin rearranged them and made the car disappear in a cloud of smoke

For what you get out of a Corvette I don't know of any car that offers so much for your money gotta love em.

 

Um how do you post photos?

Is the image size to large?

 

You need to upload your photos to something like PHOTOBUCKET.COM (its free) and then copy the IMG CODE into the post. It works GREAT!

BC

 

Thanks got it figured out now