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A3 Mk2

Complete filling of fuel pipe
Complete filling of fuel pipe
Test requirements satisfied → Chapter and test preparation performed → Chapter
–  Switch ignition on and all electrical equipment off.
–  Check and if necessary correct coding of auxiliary heater control unit -J364- → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
–  Switch off ignition and all electrical equipment.
  Note
The Guided Fault Finding for the auxiliary heater can only be started if the ignition is switched on (the data bus diagnostic interface -J533- is only active when the ignition is on). Once the auxiliary heater has switched to diagnostic mode, you can continue with the Guided Fault Finding function even if the ignition switched off → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
–  Completely fill fuel pipe (from metering pump -V54- to measuring container) with fuel → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
  Note
t  The delivery rate can only be checked via the Basic setting function. This does however involve using the “Adaption” function to enter the activation time of the metering pump -V54- and enabling the “Pipe filling” function in a further adaption channel → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
t  For replacement auxiliary heaters (with new auxiliary heater control unit -J364-) for which basic setting has not yet been performed using “Pipe filling” function, the value displayed for the time required for filling the pipe may not be “0”, but rather a different value such as “200” → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
t  The delivery rate can only be checked by way of the “Basic setting” function if the value “0” has been entered in the adaption channel for enabling “Pipe filling”. When the “Pipe filling” function is implemented, the adaption value is reset to “1” and this function is thus disabled → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
t  For replacement auxiliary heaters (with new auxiliary heater control unit -J364-) for which basic setting has not yet been performed with “Pipe filling” function, value “0” may also be displayed.
t  Following implementation of the “Pipe filling” function, the display in the measured value block is reset to the factory setting for the auxiliary heater. After completing the necessary work steps, the auxiliary heater must therefore be activated via the “Basic setting” function → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
t  The metering pump -V54- is activated for 30 seconds at 7 hertz (7 pulses per second) in the “Pipe filling” function if e.g. “30” has been entered in the adaption channel for the “Pipe filling” function (the fuel pipe is then completely filled with fuel).
t  Once “Pipe filling” function has been started, it cannot be aborted and is implemented in full by control unit regardless of any entries made via tester.
   
–  Empty and re-attach measuring container -C-.
–  Terminate Guided Fault Finding.
The following is stored in the auxiliary heater control unit -J364- to prevent too much fuel from being delivered to the auxiliary heater:
t  It may only be possible to perform “Pipe filling” once in the “Basic setting” function in the course of Guided Fault Finding depending on the version of the auxiliary heater control unit -J364- (not necessary for all versions of the auxiliary heater control unit -J364-, terminate Guided Fault Finding and re-start if necessary) → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
t  Once “Pipe filling” has been performed in the “Basic setting” function, the auxiliary heater control unit -J364- resets the time entered in the adaption channel for “Pipe filling” to “0” (activation time of the metering pump -V54- in the “Pipe filling” function) and, in a further adaption channel, the value is set to “1” (pipe filling disabled as already implemented) → Guided Fault Finding function of vehicle diagnostic, testing and information system VAS 5051.
  A82-0474

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