User Manual

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6. AbsSrs Testing
ABS -“Anti-lock Braking System” in most vehicles is made up of
an electronic hydraulic pump of two, three or most commonly four
Wheel Speed Sensors (WSS), a G-force sensor, a Vehicle Speed
Sensor and an ABS Control Module (EBCM). The EBCM is
constantly monitoring the WSS, the Vehicle Speed Sensor, and the
G-sensor.
Diagnosing an ABS problem should always start with a visual
inspection of all brake components, then you will need to retrieve
ABS DTCs to tell you where the problem is.
SRS - “Supplemental Restraint System” is made up of Impact
Sensors, a Control Module, and Airbags. When the impact sensors
detect a collision they send an extremely fast signal to the control
module, which relays that signal to the airbags, deploying them to
help prevent vehicle occupants from hitting interior objects such as
steering wheels, dashboards, and the like. When the control module
detects a problem with the airbags or sensors the Malfunction
Indicator Light (MIL) will turn on.
The ABS/SRS diagnostic function is used to retrieve and clear
codes from the vehicle’s ABS/SRS systems. 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.
NOTE: Autel accepts no responsibility for any accident or
injury arising from servicing the ABS/SRS systems. When
interpreting DTCs retrieved from the vehicle, always follow
the manufacturer’s recommendation for repair.
NOTE: All software screens shown in this manual are
examples, actual test screens may vary for each vehicle being
tested. Observe the menu titles and onscreen instructions to
make correct option selections.