| Adaption of throttle valve control unit |
| The adaption process enables the engine control unit to learn the various positions of the throttle valve with the ignition switched on and the engine not running. These positions are stored in the control unit. The feedback signal indicating the position of the throttle valve comes from the two throttle valve actuator angle senders. |
| If throttle valve control unit -J338- or the engine control unit are replaced, adaption must always be performed. |
| The learning process (adaption process) is performed: |
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| Automatically if the ignition is switched on for at least 4 seconds without operating the starter or depressing the accelerator, and if the engine control unit registers a “learning requirement”. (In this case, however, it is not obvious whether the adaption process was successful or not). Adaption requirement is recognised if stored voltage values from the angle senders do not coincide with current measured voltage values in a certain tolerance band. |
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| By initiating basic setting (function 04), display group 060 with ignition on. |
Note! | Engine will not start during automatic adaption. |
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