Traction control engages when it shouldn't
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Traction control engages when it shouldn't
I believe traction control is my issue.. here is the problem.
I have a 99 FRC with a D1 supercharger. The car makes about 550whp. A couple weeks ago I layed into the throttle and the motor bogged down heavily. It felt like the ECU had put the car into limp mode to protect it or something along those lines. There was almost no power at all. I've taken it out a few more times to diagnose the problem and it feels the same in any gear when going 50%+ throttle. I'm not throwing codes - and the engine is not in REP mode.
I had the battery out of the car for a few weeks (was just using it as a backup for my boat). I took it out this AM hoping maybe a PMC reset would change something but i still get the same result.
Today though - i noticed the "traction control activated" message would pop up when i'm having this problem. I believe traction control is activating when it shouldn't. I can feel some vibration in the rear like it's applying the brakes too. (it also feels like it's cutting throttle & spark etc)
Is there a sensor that may have went bad to cause this problem?
I have a 99 FRC with a D1 supercharger. The car makes about 550whp. A couple weeks ago I layed into the throttle and the motor bogged down heavily. It felt like the ECU had put the car into limp mode to protect it or something along those lines. There was almost no power at all. I've taken it out a few more times to diagnose the problem and it feels the same in any gear when going 50%+ throttle. I'm not throwing codes - and the engine is not in REP mode.
I had the battery out of the car for a few weeks (was just using it as a backup for my boat). I took it out this AM hoping maybe a PMC reset would change something but i still get the same result.
Today though - i noticed the "traction control activated" message would pop up when i'm having this problem. I believe traction control is activating when it shouldn't. I can feel some vibration in the rear like it's applying the brakes too. (it also feels like it's cutting throttle & spark etc)
Is there a sensor that may have went bad to cause this problem?
Le Mans Master
Joined: Jun 2009
Posts: 6,528
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From: South Dakota
Three things.
Like 8Vette7 said, are there any codes?
With 550hp and laying into the throttle, are you sure you are not spinning the tires some?
What size tires do you have? If they don't have enough stagger front to rear or if it is very close, then very little tire slip might cause the TC to engage.
Good luck.
Like 8Vette7 said, are there any codes?
With 550hp and laying into the throttle, are you sure you are not spinning the tires some?
What size tires do you have? If they don't have enough stagger front to rear or if it is very close, then very little tire slip might cause the TC to engage.
Good luck.
Melting Slicks
Joined: Dec 2003
Posts: 3,315
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From: Near Jacksonville Fl.
What size tires do you have? If they don't have enough stagger front to rear or if it is very close, then very little tire slip might cause the TC to engage.
This ^^^^
Had the same problem after putting Z06 size 295's on the back with 275's on the front.
This ^^^^
Had the same problem after putting Z06 size 295's on the back with 275's on the front.
Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
When it BOGS,, look at the DIC and see if there are any messaged like Traction Control ACTIVE or Active Handling Active.If you have ACTIVE HANDLING,,, PRESS and HOLD the TC Mode button for 10-12 sec, it will go into COMP MODE and that will allow you to spin the tires all you want and it will attempt to keep the car going in the direction that your telling to.
I have 450 RWHP and I infringe on the cars handling computer frequently!
Sometimes I forget to set comp mode or just turn it off.Note!!!! When you are in OFF mode,,, ALL the driving is on "YOU"
The back end LOVES to try to out run the front end on these cars!!!
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Originally Posted by RonSSNova
Sounds like it's working normal to me. I doubt it has a clue how to handle 550whp, so it does what it does. It was designed for more like 300whp.......
Why don't you just turn it off?
Why don't you just turn it off?
Originally Posted by Bill Curlee
I agree!! When it BOGS,, look at the DIC and see if there are any messaged like Traction Control ACTIVE or Active Handling Active.
If you have ACTIVE HANDLING,,, PRESS and HOLD the TC Mode button for 10-12 sec, it will go into COMP MODE and that will allow you to spin the tires all you want and it will attempt to keep the car going in the direction that your telling to.
I have 450 RWHP and I infringe on the cars handling computer frequently! Sometimes I forget to set comp mode or just turn it off.
If you have ACTIVE HANDLING,,, PRESS and HOLD the TC Mode button for 10-12 sec, it will go into COMP MODE and that will allow you to spin the tires all you want and it will attempt to keep the car going in the direction that your telling to.
I have 450 RWHP and I infringe on the cars handling computer frequently! Sometimes I forget to set comp mode or just turn it off.
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Here are the codes. I hadn't noticed the TC light was blinking previous to looking at these codes the other week - so it makes more sense now that C1286 might be my issue.
TCS
C1236 H
C1255 H
C1281 H
C1286 H C
BCM
B2583 H
SDM
B1001 H
BO-RFA
U1255H
C2120 H C
PCM
P0704 H C
TCS
C1236 H
C1255 H
C1281 H
C1286 H C
BCM
B2583 H
SDM
B1001 H
BO-RFA
U1255H
C2120 H C
PCM
P0704 H C
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I have a 25 minute commute - as i went along - the condition got worse. I could just barely keep it at traffic speed now - forget about full throttle acceleration. A noise developed that i could hear through the shifter (a rattle). It was pretty loud. When i push the clutch in... it goes away. So i'm assuming something blew up in my clutch.
Some codes came up during the drive after the reset (checked while car was still running).
PCM P0300
TCS C1286
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Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
C1286 code means that the SWPS is giving the EBTCM false steering wheel position sensor (SWPS) inputs and the accelorometors are telling the computer that the car is going straight and NOT responding to those false steering wheel inputs.
SO,,,,, The EBTCM is applying brakes trying to make the car go in the direction that the false steering wheel inputs are telling it to go.
Im surprised that you said disconnecting the EBTCM had on effect on the problem ??? ??? When you disconnect that module, the Brake Pressure Modulator Valve (BPMV ) defaults to normal non assisted braking.
If it were me, I would pull the EBTCM fuses until you can get the SWPS replaced.
You also have a P0300 which is a Random misfire. Could that be your loss of power???
BC
SO,,,,, The EBTCM is applying brakes trying to make the car go in the direction that the false steering wheel inputs are telling it to go.
Im surprised that you said disconnecting the EBTCM had on effect on the problem ???
??? When you disconnect that module, the Brake Pressure Modulator Valve (BPMV ) defaults to normal non assisted braking. If it were me, I would pull the EBTCM fuses until you can get the SWPS replaced.
You also have a P0300 which is a Random misfire. Could that be your loss of power???
BC
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C1286 code means that the SWPS is giving the EBTCM false steering wheel position sensor (SWPS) inputs and the accelorometors are telling the computer that the car is going straight and NOT responding to those false steering wheel inputs.
SO,,,,, The EBTCM is applying brakes trying to make the car go in the direction that the false steering wheel inputs are telling it to go.
Im surprised that you said disconnecting the EBTCM had on effect on the problem ??? ??? When you disconnect that module, the Brake Pressure Modulator Valve (BPMV ) defaults to normal non assisted braking.
If it were me, I would pull the EBTCM fuses until you can get the SWPS replaced.
You also have a P0300 which is a Random misfire. Could that be your loss of power???
BC
SO,,,,, The EBTCM is applying brakes trying to make the car go in the direction that the false steering wheel inputs are telling it to go.
Im surprised that you said disconnecting the EBTCM had on effect on the problem ???
??? When you disconnect that module, the Brake Pressure Modulator Valve (BPMV ) defaults to normal non assisted braking. If it were me, I would pull the EBTCM fuses until you can get the SWPS replaced.
You also have a P0300 which is a Random misfire. Could that be your loss of power???
BC
Thread Starter
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Joined: Apr 2011
Posts: 61
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C1286 code means that the SWPS is giving the EBTCM false steering wheel position sensor (SWPS) inputs and the accelorometors are telling the computer that the car is going straight and NOT responding to those false steering wheel inputs.
If it were me, I would pull the EBTCM fuses until you can get the SWPS replaced.
You also have a P0300 which is a Random misfire. Could that be your loss of power???
BC
If it were me, I would pull the EBTCM fuses until you can get the SWPS replaced.
You also have a P0300 which is a Random misfire. Could that be your loss of power???
BC
In a recent development - there is an uncomfortable amount of smoke coming from the oil fill. I guess it's time for a compression check.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
CHECK YOUR VALVE SPRINGS!!
Make sure that none are broken. Seen the smoke from the oil fill and broken springs on a couple other cars.
If you have an infared laser temp probe, measure the temperature of EACH cylinder intake manifold runner at the point close to where it meets the head.
If one runner is a LOT hotter than the others, the bad spring is on that intake valve.
Bill
Make sure that none are broken. Seen the smoke from the oil fill and broken springs on a couple other cars.
If you have an infared laser temp probe, measure the temperature of EACH cylinder intake manifold runner at the point close to where it meets the head.
If one runner is a LOT hotter than the others, the bad spring is on that intake valve.
Bill
Melting Slicks
Joined: Nov 2008
Posts: 2,938
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From: Rochester Hills MI
i think that goes for all c5's. the traction control system pretty much sucks if you ask me. it cuts way too much throttle. Although it can be useful in the rain at highway speeds in case you start to hydroplane.