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5.4 Steering Angle Sensor (SAS) Service
Steering Angle Sensor Calibration permanently stores the current steering wheel position
as the straight-ahead position in the steering angle sensor EEPROM. Therefore, the front
wheels and the steering wheel must be set exactly to the straight-ahead position before
calibration. In addition, the vehicle identification number is also read from the instrument
cluster and stored permanently in the steering angle sensor EEPROM. On successful
completion of calibration, the steering angle sensor fault memory is automatically cleared.
Calibration must always be carried out after the following operations:
Steering wheel replacement
Steering angle sensor replacement
Any maintenance that involves opening the connector hub from the steering angle
sensor to the column
Any maintenance or repair work on the steering linkage, steering gear or other
related mechanism
Wheel alignment or wheel track adjustment
Accident repairs where damage to the steering angle sensor or assembly, or any
part of the steering system may have occurred
NOTE
AUTEL accepts no responsibility for any accident or injury arising from servicing the
SAS system. When interpreting DTCs retrieved from the vehicle, always follow the
manufacturer’s recommendation for repair.
All software screens shown in this manual are examples, actual test screens may
vary for each vehicle being tested. Observe the menu titles and on-screen
instructions to make correct option selections.
Before starting the procedure, make sure the vehicle has ESC. Look for the button
on dash.
5.5 Diesel Particle Filter (DPF) Service
The Diesel Particle Filter (DPF) function manages DPF regeneration, DPF component
replacement teach-in, and DPF teach-in after replacing the engine control unit.
The ECM monitors driving style and selects a suitable time to employ regeneration. Cars
driven a lot at idling speed and low load will attempt to regenerate earlier than cars driven
with higher load and speed. In order for regeneration to take place, a prolonged high
exhaust temperature must be obtained.
In the event of the car being driven in such a way that regeneration is not possible, i.e.,
frequent short journeys, a diagnostic trouble code will eventually be registered in addition
to the DPF light and "Check Engine" indicators. A service regeneration can be requested
in the workshop using the diagnostic tool.
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