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NOTE
1. The DPF will not regenerate when the engine management light is on or when there is a
faulty EGR valve.
2. The ECU must be re-adapted when replacing the DPF and when topping up the fuel
additive Eolys.
3. If the vehicle needs to be driven in order to perform a DPF service, a second person is
required for the function: One person should drive the vehicle while the other person
observes the screen on the tool. Do not attempt to drive and observe the scan tool at the
same time. This is dangerous and puts your life and the lives of other motorists and
pedestrians at risk.
10.6 Immobilizer (IMMO) Service
An immobilizer is an anti-theft mechanism that prevents an automobile's engine from starting
unless the correct ignition key or other device is present. This device prevents thieves from
starting the car by a method known as hot wiring. Most new vehicles have an immobilizer as
standard equipment. An important advantage of this system is that it doesn't require the car
owner to activate it; it operates automatically. An immobilizer is considered as providing much
more effective anti-theft protection than an audible alarm alone; many auto insurance
companies offer lower rates for vehicles that are equipped with an immobilizer.
As an anti-theft device, an immobilizer disables one of the systems needed to start a car's
engine, usually the fuel supply or the ignition. This is accomplished by radio frequency
identification between a transponder in the ignition key and a radio frequency reader in the
steering column. When the key is placed in the ignition, the 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 engine. If the code is incorrect or absent, the computer disables the
system, and the engine will be unable to start until the correct key is placed in the ignition.
The IMMO service can disable a lost vehicle key and program the replacement key fob. One
or more replacement key fobs can be programmed.
10.7 Steering Angle Sensor (SAS) Service
Steering Angle Sensor (SAS) Calibration permanently stores the current steering wheel
position as the straight-ahead position in the SAS EEPROM. Therefore, the front wheels and
the steering wheel must be set exactly to the straight-ahead position before calibration. In
addition, the VIN is also read from the instrument cluster and stored permanently in the SAS
EEPROM. On successful completion of calibration, the SAS fault memory is automatically
cleared.
Calibration must always be carried out after the following operations:
Steering wheel replacement
SAS replacement
