Preconditions for the test:
Ignition on.
No faults stored.
Battery voltage min. 11.5 volts.
All electrical loads switched off.
Throttle at idling position.
Engine temperature between 5 and 95 °C.
If cruise control is fitted, it must be working properly.
Note:
The basic setting matches (”adapts”) the throttle control unit to the engine control unit.
Adaption must be done when:
If the electric power supply to the engine control unit has been disconnected.
The throttle control unit has been removed from the vehicle.
The throttle control unit has been replaced.
If the engine control unit has been replaced.
Procedure:
Choose the throttle control unit function.
The throttle control unit disconnects the electric power supply from the throttle unit. When you do this, the throttle is pushed forward to its emergency driving stop. The positions of the throttle sensors for this setting are stored in the engine control unit. After this, the throttle is opened. When it has reached its position, the power supply is disconnected. The throttle must then return mechanically to the emergency driving position within a specified time. After this, the throttle control unit closes the throttle and the stored values from the throttle sensors are stored in the engine control unit.
Check the values in adaption step and adaption status. Prescribed value adaption steps must be counted upwards from 0 to 12; adaption status must change from ”Adaption in progress…” to ”Adaption OK!” /Adaption Error!.
Switch off ignition and wait at least 30 seconds to store the values.