Will bad shocks cause the traction control light to come on when I hit a bump ? I have replaced all 4 hubs, front & rear and it still comes on.

 

What codes are you getting?

 

I can't see how shocks would affect this. Try cleaning and tightening the ABS wires and connectors to each wheel. You can pull the codes and see which wires in particular are causing the problem.
There are also other problems that could be pointed to by the codes. Post them up and we'll give it a shot.

 

Codes?

 

I just cleared all the codes, do I need to drive it to see what comes back ?

 

Bo-RFA C2100 H C
40-BCM B0502 H C, B0507 H C, B2482 H C
99 HVAC B0361 H C, B0363 H, B0365 H, B0367 H

I also repaired my HVAC control gears but don;t know how to get them in time.

 

there is a write on cleaning the frame grounds for traction control problems.

 

What and where is it ??

 

Bo-RFA C2100 H C
40-BCM B0502 H C, B0507 H C, B2482 H C
99 HVAC B0361 H C, B0363 H, B0365 H, B0367 H

I also repaired my HVAC control gears but don;t know how to get them in time.

 

I’m a little confused, are you getting a Service Traction Control message or a Traction Control Active message?

Your current list of DTC’s do not show any traction control issues.

 

Need to find out whether you are getting a Service TC message or you are getting a TC active message. The first says there is a problem and the second is just information to the driver.

Yes very bad shocks can cause TC to activate when you go over a bump. All it takes is for one of the wheels to leave contact with the ground for a very short time period. The EBCM sees the instantaneous wheel speed change and responds by activating TC which in this case is usually a reduction in engine torque. This can also happen even if the shocks are in great condition. My 97 used to activate TC every time I left the parking lot where I worked. I would be turning right as I exited the lot and the pavement took a dip right where it met the highway pavement. If I crossed that dip at an angle so the rear tires went across it separately and had just a little throttle applied while going 3 mph the TC would activate and almost stop the car.

Bill

 

The message is "Service Traction System & Service ABS.

 

Odd.

You have a few issues that need fixing but none should be giving you a Service Traction System warning.

Can't say that I've ever had any random DIC messages without codes being set. As Bill says, maybe it's working normally and just certain conditions cause it to activate. Is it always in certain road conditions or does it activate in different areas?

Not sure if it helps but here's some stuff on your current codes.

Bo-RFA C2100 H C
C2100 is a Left Front TPM Sensor Malfunction. Do you have XXX shown on the DIC against the front left sensor? If so your battery has gone bad and you need a new TPS on that wheel.

40-BCM B0502 H C, B0507 H C
Looks like your DRLs are inhibited. The most likely way thats been done is to pull the A2 fuse in the engine bay. that inhibits the Approach Lights function which shuts off the DRLs. theres a more complex mod that uses jumpers to bypass 2 relays but check the fuse first.

40-BCM B2482 H C
B2482 Backup Lamp Relay Circuit
From the book:
The backup lamp circuit is part of a standard backup lamp system except for the addition of a relay and the BCM providing a control circuit. The BCMcan ground the backup lamp relay control circuit in order to energize the relay and turn ON the backup lamps, allowing the backup lamps to be used for Universal Theft Deterrent (UTD) and approach lighting functions. The BCM monitors the voltage level on the backup lamp control circuit. Whenthe BCM commands the relay ON, the voltage level on the control circuit should be low. When the relay is OFF, the voltage level should be high. If the BCM detects a voltage level other than expected, a malfunction ispresent and a DTC will set.
I can't remember if you get this code when you pull the A2 fuse as I've done the relay mod. Refit the fuse if its been pulled and see if the code goes away.

99 HVAC B0361 H C,
The HVAC control module commands the left air temperature actuator to move by controlling the voltage supplied on the control circuit. A low voltage of 0 volts moves door toward full cold. A voltage of 2.5 volts stops the door. A high voltage of 5 volts moves the door toward full hot. The HVAC control module determines the current position of the actuator by monitoring the voltage on the signal circuit. The feedback potentiometer is a function of the motor position. A high voltage of 4-5 volts indicates full cold door position. A low voltage of less than 1 volt indicates full hot door position. The HVAC control module controls the left air temperature actuator door positions in order to maintain the selected air temperature.

All the troubleshooting for this snag involves checking the left air temperature actuator circuit for a short. Failing that, inspect for poor connections at the harness connector of the left air temperature actuator and the HVAC control module

 

Dee Gee, Your correct about the running lights. The running lights kept getting so hot and melting the turn signal housing that I pulled the fuse. I repaired the hole in the housing but left the fuse out. Now I just turn on park lights run I want running lights. The HVAC control module was sent off a year or so ago and repaired. Everything worked fine until about 6 months ago. I pulled the actuators out from the dash and did a repair on the gears. Then blew hot all the time, pulled out and put back, now it blows cold.Not wanting to pull the dash apart again.I thought they needed timming to make them open and close at the right time. Maybe a connection is lose ?? or not getting a good ground ??