Where is the ECBM module located on the 2002 trooper?
ABS light came on and I got the code (43) which directed me to do some further diagnostics around relays on or near the ECBM. The 1997 manual I am usinng showed this module under the passenger seat, but on the 2002 vechicle, it doesn't appear to be under that seat of the front seat.
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You could have two separate issues or just one. First check the level of brake fluid. (brake light)Fill it and if the light goes out, then you have to use a CReader or scanner to get the ABS codes. Cold be wheel sensors, broken wire, or the ABS module. If you can't get the brake light to go out, then it is the ABS, three possible causes. One is the ABS module is dead. second is the pump has failed. third is a bad ground wire. check the ground first. The ground is the biggest wire going from the pump /module to the body. When these loose ground, I cut the end off and run a longer wire to a better spot on the body. When you see it, you will know why.
PRE-DIAGNOSTIC INSPECTIONBefore diagnosing ABS/TCS, perform a comprehensive visual inspection of system as follows.Check ABS/TCS wiring harness connectors for looseness. Check harness routing; pay particular attention to wheel speed sensor wiring harness routing. Check fuses No. 1D, 5B and 6B in instrument panel fuse block. Check fuses No. 1 and 2 in underhood fuse block. Check brake fluid level in master cylinder reservoir. Check brake fluid level in Pressure Modulator Valve (PMV) assembly reservoir. Ensure parking brake is fully released. Ensure parking brake switch is functioning properly. Always perform ABS/TCS system functional check before using DIAGNOSTIC CODE CHARTSThe EBCM/EBTCM has self-diagnostic capability, which can detect system failures. Fault codes stored by EBCM/EBTCM can be displayed using Tech 1 scan tester. There are no provisions for flash code diagnostics.Begin ABS/TCS diagnosis with PRE-DIAGNOSTIC INSPECTION procedure. If failures are found during pre-diagnostic inspection, perform necessary repairs, and proceed with ABS/TCS FUNCTIONAL CHECK. See Fig. 5 .If no failures are found during pre-diagnostic inspection, go to ABS/TCS FUNCTIONAL CHECK. See Fig. 5 . The ABS/TCS FUNCTIONAL CHECK will either indicate ABS/TCS is functioning properly or direct technician to various diagnostic procedures such as diagnostic charts, symptom diagnosis or BRAKE warning light diagnosis.CHART D - TRACTION OFF WARNING LIGHT ON CONTINUOUSLY & NO DTC SET (BUICK WITH UH8 OR U2A INSTRUMENT CLUSTER)Circuit DescriptionWhen ignition switch is first turned to RUN position, EBTCM goes through a self-test, which lasts 2-4 seconds. During self-test, EBTCM commands TRACTION OFF indicator warning light on. Powertrain Control Module (PCM) can also command EBTCM to set a Code 75 which will illuminate TRACTION OFF indicator.Traction control switch is located either on instrument panel center trim plate or driver's front door trim panel. Switch allows driver to select traction control mode (on/off). When traction control system is turned off, TRACTION OFF warning light comes on.EBTCM monitors transaxle temperature through
this warning light or any other stays on in the dash it is indicating
that the systems control module (or the system sensor in the case of
lights like low oil pressure, door open indicators etc.) has detected
a fault, it then disables the system (this applies to ABS,TCS, TCM,
SRS, TPMS and BCM faults and others) as long as the light is on. You
must now have the dealer hook up a special electronic diagnostic tool
and "scan" the system for the fault code that is stored for
of Abbreviations. ABS Anti-lock brake system. TCS Traction control
system, TCM Transmission control module, SRS Supplemental restraint
system, BCM Body control module. TPMS Tire Pressure Monitor System
You first need to scan your Antilock Brake System (ABS) computer to retrieve the fault codes set by the system failure. The fault codes are needed to identify the correct diagnostic and service procedure to repair the broblem with your ABS system. It will do absolutely no good to reset the computer memory to turn the light out if the system failure is not properly diagnosed and repaired. This will only result in the light coming back on again.
Hi, there is a speed sensor causing your problem which is the one on the top of the rear differential. Its the one that runs the speedometer, picked up by the abs module. The abs is disabled if the light is on, your brakes will stayed locked if you start to slide.
I'd start with replacing the rear speed sensor and see what happens. This should bring your speedometer back if nothing else. If you still have the other code coming back you'll have to replace the abs control module. That code is a direct internal failure of the control module, no diagnostics required.
The ABS light comes on when the ABS module
detects a fault in the ABS system. There are dozens of component
failures and open/shorts in wiring that will set the ABS light, ranging
from a faulty wheel speed sensor, open/short in wheel speed sensor
wiring harness, faulty hydraulic unit, fault electronic brake control
module(EBCM), faulty tone ring,etc. There isnt a relay or reset
procedure to turn the light off- it can only be turned off by repairing
the fault responsible for turning it on, and then using the factory scan
tool to erase the fault code and reset the light.
it is possible the majority of the faults to be repaired at home, the
fault codes can only br retreived with a diagnostic scanner with ABS
capability. This has to be done first in order to know where the problem
is to either repair or do further diagnostics to determine if it is a
faulty part or a wiring harness issue. If the problem is in the
hyrdaulic unit, this would need to be replaced by a shop as it will
require bleeding afterwards with a diagnostic scanner.
would advise spending the $50-70 to have the on-board computer read for
stored ABS fault codes. Considering that most sensors cost that much
themselves, you can quickly sink much more than a diagnostic fee into
replacing parts based on "what usually goes out" guesses
Hope this helped (remember comment and rated this).
sounds like your abs trac control module is going its located on the front drivers side behind wheel well cover , 850 for new best to pick up from junk yard about 100. module changed in 2002 . make sure you get right year .mine went lost all break fluid no warning canister rusted out.
sounds like ABS module fault
its getting signal thinking your driving and an ABS event is happening the ABS ECU comands engine ECU to reduce power(missfire) need to read codes from system to point you in right direction.