TCS & ABS warning indicators go off and then come on and stay on while driving - brake pedal seems lower than usual
SOURCE: 2001 oldsmobile silhouette traction corntol is off and ABS light
I agree with the post about the tail lights. And the symptom about the brakes on when starting was also helpful. When I took off my rear tail lights and removed the top light bulb (top of the 4 is closest to connector) then repeat starting the car the problem is gone. I have a whole drawer of these bulbs that I removed, not because the filament was burned out, but because the base (similar to circuit card edge connector) had heat damage and melted. I am not sure exactly what the problem is but I think there are multiple conductors in the fixture which are too close or get moisture shorts. Anyway I hypothesize the circuit for daytime running lights is leaking current into the brake light circuit, and it causes that module that controls traction control and ABS to declare a fault. When you start with foot on the brakes the brake lamp is pulled on (I don't know if switches hi or lo) so that module doesn't declare the fault until you release the brakes.
I put in new bulbs and it works fine for now, but I know it may reappear some day then I will repeat, disassembly of the fixtures and inspect bulb bases for heat damage and clean out and replace. That is what did the trick for me.
Thanks Fixya and all contributors
SOURCE: my brake light, ABS light and TCS light all appear
The brake light may be on because of low fluid.The traction control is on because the abs light is on.System requires the abs to be actively working for traction control to work.The most common cause of this is a wheel speed sensor which on this vehicle is part of the bearing hub assembly.You will need a scan tool to locate where the fault is in the abs system.
SOURCE: 1999 Oldsmobile silhouette brake light and tcs
check the abs sensors common to hit or damage the wiring or knock connection loose when doing a brake job the traction control system[tcs] is tied into the abs system
SOURCE: 1999 Olds Silhouette -- Problem -
In your case, there a lot of meaning about ABS light problem. But the sulotion is go to the nearest auto parts or autozone, they scan your car for free of chage and they will give you the obd diagnose code and they can also look up on their computer to find out what is the real problem... best of luck..
Ginskie.
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For Chevrolet only, the shift lever is in FIRST (1) or SECOND (2) gear. The EBCM receives a class 2 message from the powertrain control module (PCM) indicating the gear position.
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For Pontiac and Oldsmobile only, the body control module (BCM) detects that the traction control switch is pressed (signal circuit is low). The EBCM receives a class 2 message from the BCM indicating the switch status.
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The BCM detects that the park brake is engaged (signal circuit is low) and that the engine is on. The EBCM receives a class 2 message from the BCM indicating the park brake status.
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The PCM detects certain malfunctions and is unable to perform torque reduction requests from the EBCM. The EBCM receives a class 2 message from the PCM indicating that traction control cannot be performed.
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The EBCM detects a malfunction in the traction control system. The IPC receives class 2 messages from the EBCM requesting illumination of both the service vehicle soon and traction off indicators.
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The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
With the light lit there are DTC'S - diagnostic trouble codes stored in the EBCM -
TRAC OFF
Traction Off: Refer to ABS Description and Operation in Antilock Brake System
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The ability of the control modules to communicate through the serial data circuit
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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:
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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.
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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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The body control module (BCM) detects that the traction control switch has been pressed (signal circuit is low). The BCM sends a serial data message to the EBCM in order to disable traction control. The IPC receives a serial data message from the BCM requesting illumination. The BCM sends a serial data message to the radio in order to activate an audible warning.
you need to have the ( EBCM ) electronic brake control module checked fro codes !
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The Body Control module (BCM) detects that the traction control switch has been pressed (signal circuit is low). The Body Control module (BCM) sends a serial data message to the EBCM in order to disable traction control. The IPC receives a serial data message from the EBCM requesting illumination. The BCM sends a serial data message to the radio in order to activate an audible warning.
Your best bet is to take it to a ASE certified an qualified repair shop ,that has the diagnostic tool to fix this problem .
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