Help!! Traction Control problem??
Thread Starter
Pro
Joined: Feb 2001
Posts: 518
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From: Bay Area CA
Help!! Traction Control problem??
Earlier today my din said to service vehicle soon. Started the car and the traction control and ABS warning light stayed on. Any thoughts of what's wrong? I would really like to advoid the dealer if possible :)
Melting Slicks
Joined: May 2001
Posts: 3,270
Likes: 26
From: Winchester VA
Cruise-In V Veteran
Re: Help!! Traction Control problem?? (boost2much)
The Lateral Accelerometer is a self contained unit which uses a reference voltage of 5 volts. The sensor's operating range is -1.5 - +1.5G, resulting in an output range of 0.25-4.75 volts. Zero lateral acceleration results in an output signal of 2.5 volts. The EBCM uses the Lateral Accelerometer along with the Steering Wheel Position Sensor, and the Wheel Speed Sensors to calculate the desired yaw rate. The EBCM compares the desired yaw rate to the actual yaw rate that is received from the Yaw Rate Sensor. The difference between the actual yaw rate and the desired yaw rate is the yaw rate error. The Lateral Accelerometer is also used for the Bank Angle Compensation calculation. The Bank Angle Compensation calculation is an important part of the Active Handling algorithm.
The function of the EBCM is to monitor inputs from all related sensors, determine wheel slip tendencies, yaw rate error if equipped with Active Handling (RPO JL4), control the brake system during Antilock, Traction Control, or Active Handling events and monitor the system for proper operation.
The EBCM continuously checks the speed of each wheel to determine if any wheel is beginning to slip. If a wheel slip tendency is detected, the EBCM commands appropriate valve positions to modulate brake fluid pressure in some or all of the hydraulic circuits to prevent wheel slip and provide optimum braking. The EBCM continues to control pressure in individual hydraulic circuits until a slipping tendency is no longer present. If equipped with Active Handling the EBCM also monitors the yaw rate error. If the yaw rate error becomes too large, the EBCM will modulate brake fluid pressure to the individual wheel brakes as needed to restore the proper yaw rate error. If the EBCM detects a system malfunction, it can disable the Antilock, Traction Control, and Active Handling functions and turn on the Antilock and/or Car Icon (TCS indicator) Indicators in the instrument cluster.
Pump Motor Relay and Solenoid Valve Relay
The pump motor relay provides power to the pump motor during Antilock braking, Traction Control or Active Handling (if equipped with RPO JL4). The Solenoid Valve Relay provides power to the solenoid valves in the Brake Pressure Modulator Valve (BPMV). Both of these relays are an integral part of the EBCM and cannot be serviced separately.
Let us know what you find...
The function of the EBCM is to monitor inputs from all related sensors, determine wheel slip tendencies, yaw rate error if equipped with Active Handling (RPO JL4), control the brake system during Antilock, Traction Control, or Active Handling events and monitor the system for proper operation.
The EBCM continuously checks the speed of each wheel to determine if any wheel is beginning to slip. If a wheel slip tendency is detected, the EBCM commands appropriate valve positions to modulate brake fluid pressure in some or all of the hydraulic circuits to prevent wheel slip and provide optimum braking. The EBCM continues to control pressure in individual hydraulic circuits until a slipping tendency is no longer present. If equipped with Active Handling the EBCM also monitors the yaw rate error. If the yaw rate error becomes too large, the EBCM will modulate brake fluid pressure to the individual wheel brakes as needed to restore the proper yaw rate error. If the EBCM detects a system malfunction, it can disable the Antilock, Traction Control, and Active Handling functions and turn on the Antilock and/or Car Icon (TCS indicator) Indicators in the instrument cluster.
Pump Motor Relay and Solenoid Valve Relay
The pump motor relay provides power to the pump motor during Antilock braking, Traction Control or Active Handling (if equipped with RPO JL4). The Solenoid Valve Relay provides power to the solenoid valves in the Brake Pressure Modulator Valve (BPMV). Both of these relays are an integral part of the EBCM and cannot be serviced separately.
Let us know what you find...
Race Director
Joined: Aug 2001
Posts: 17,901
Likes: 18
From: Elko, Nevada
Re: Help!! Traction Control problem?? (Ski2Tee)
The sensor's operating range is -1.5 - +1.5G, resulting in an output range of 0.25-4.75 volts. Zero lateral acceleration results in an output signal of 2.5 volts.
Thread Starter
Pro
Joined: Feb 2001
Posts: 518
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From: Bay Area CA
Re: Help!! Traction Control problem?? (Ski2Tee)
Today the message was gone and the warning lights off. My guess would be that maybe one of the sensors was just acting up. I'm relieved but a little worried that it may happen again. I guess I'll just have to bite the bullet and take it to the dealer if it does. Keeping my fingers crossed that it doesn't. Thanks Ski2Tee for the info. Sure made me go :crazy:
:cheers:
:cheers:
