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2
Getting Started
Section 2 – Getting Started
Introduction
The ABS/SRS Code Reader OBDII Scan Tool was developed by experts in the
automotive service industry to access the information stored in the various
vehicle modules. The Tool retrieves codes from the ABS and SRS systems and
scans for OBDII codes. It also provides the definition of each code to help
diagnose problem areas within the systems that may cause the malfunction
indicator light (MIL) to turn on.
All information, illustrations and specifications contained in this manual are
based on the latest information available from industry sources at the time of
publication. No warranty (expressed or implied) can be made for its accuracy
or completeness, nor is any responsibility assumed by the manufacturer or
anyone connected with it for loss or damages suffered through reliance on any
information contained in this manual or misuse of accompanying product. The
manufacturer reserves the right to make changes at any time to this manual or
accompanying product without obligation to notify any person or organization
of such changes.
The Tool may not detect every malfunction. Do not take
chances with brakes, steering, airbags, or other vital
vehicle functions, as a serious accident could result.
Always follow vehicle manufacturer’s warnings,
cautions, and service procedures.
Automatic Braking Systems
Automatic Braking Systems (ABS) have been included in automotive
applications since the 1980s. All these systems work in a similar fashion
although the configuration and complexity of the systems can vary
greatly.
How ABS Works
When the brake pedal is pressed with normal force, the vehicle
decelerates. If, during deceleration, the ABS computer detects wheels
rotating at different speeds (wheels slipping) from data provided by the
wheel speed sensors, then the vehicle enters antilock mode. During
antilock mode, the ABS computer will control brake fluid hydraulic
pressure delivered to the wheels. The brake fluid hydraulic pressure will
be equal to or less than the value delivered by the master cylinder. By
controlling pressure to the wheels, the ABS computer can prevent one
wheel from locking up while others keep turning. It can also prevent
wheels from turning at different rates, so the vehicle should stop in a
straight line.
!
WARNING
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