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82
transponder sends a signal with a unique identification code to the reader, which relays
it to a receiver in the vehicle's computer control module. If the code is correct, the
computer allows the fuel supply and ignition systems to operate and start the car. If the
code is incorrect or absent, the computer disables the system, and the car will be unable
to start until the correct key is placed in the ignition.
The IMMO Keys service can disable a lost vehicle key and program the replacement key
fob. One or more replacement key fobs can be programmed.
Steering Angle Sensor (SAS)
The SAS 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 (VIN) 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
1. 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.
2. All software screens shown in this manual are examples, actual test screens may
vary by the vehicle. Pay attention to the menu titles and onscreen instructions to
make correct option selections.
3. Before starting procedure, make sure vehicle has an ESC button. Look for button
on dash.
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