Question about 2003 Chevrolet Impala
My 2003 chevy impala has a message in the message center about 20% of the time when I accelerate from a stop that says "TRACTION ACTIVE". It mechanically sounds like the anti-lock brake system is cycling & the tranny is slipping. It does not do this all of the time. Is there a wheel sensor or something that is sending a "false" signal to the computer?
It sounds like a wheel speed sensor to me. I am not sure if you need to replace the entire wheel bearing or not on these, but if you do, you may as well change both sides at once. I would try to look at the connection between the harness and the sensor to be sure it isn't loose or corroded, which will cause problems as well.
Posted on Jul 27, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
The ability of the control modules to communicate through the serial data circuit
The identification of any stored diagnostic trouble codes (DTCs) and their status
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
The traction control switch is a input to the body control module, with a scan tool hooked up an looking at BCM data ,check for conformation the traction control switch is turning on an off !
SERVICE TRACTION SYSTEM The IPC illuminates the SERVICE TRACTION SYSTEM indicator in the message center when the electronic brake control module (EBCM) detects a malfunction in the traction control system. The IPC receives a class 2 message from the EBCM requesting illumination. The SERVICE TRACTION SYSTEM indicator illuminates for 60 seconds when the condition is present. The IPC sends a class 2 message to the radio in order to activate an audible warning.
TRAC OFF The IPC illuminates the TRAC OFF indicator when the following occurs:
The electronic brake control module (EBCM) inhibits the traction control system due to a malfunction in the traction control system. The IPC receives a class 2 message from the EBCM requesting illumination.
The body control module (BCM) detects that the traction control switch has been pressed (signal circuit is low). The BCM sends a class 2 message to the EBCM in order to disable traction control. The IPC receives a class 2 message from the EBCM requesting illumination. The BCM sends a class 2 message to the radio in order to activate an audible warning.
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