User Manual

5
power steering and active steering systems (EPS or AFS) as well as
parking assistance systems and curve lights.
A scan tool can be used to obtain these data in degrees. The SAS is
located in a sensor cluster in the steering column. The cluster always
has more than one steering position sensor for redundancy and to
confirm data. The ESC module must receive two signals to confirm
the steering wheel position. These signals are often out of phase with
each other.
Many vehicles require the SAS be reset or recalibrated after an
alignment is performed or parts in the steering system are replaced.
There are three types of reset procedures, systems that self calibrate
on their own, vehicles that require specific wires or buttons be pressed
and, systems that require recalibration with a scan tool.
Self-Calibration
Some newer vehicles can auto calibrate by having the wheel turned
from lock to lock and then centered and cycling the key.
Scan Tool Steering Angle Sensor Reset
There are many options for scan tools to reset SASs. Some tools are
even integrated into an alignment system. But, most tools recommend
that the calibration be performed on a level surface. Also, it is a good
idea to perform a lock-to-lock turn to complete the calibration.
2.6 DPF Review
A Diesel Particulate Filter, often referred to as the DPF is a device
designed and integrated into the Diesel Engine Exhaust Systems to
trap and remove Diesel Particulate Matter or Soot from the exhaust
gasses of the diesel engine. A DPF works in conjunction with the
oxidation catalyst and EGR valve to remove a majority of the NOx,
particulate matter and unburned hydrocarbons from burned diesel fuel.
The result of DPF is greater economy, improved smoothness and a
reduction of harmful emissions.
The soot trapped in DPF will partially block your DPF causing the
DPF/CAT light to illuminate on the dash (normally when 45%