Test of AdBlue dosing unit's dosing amount


The purpose of the test is to check the dosing unit's dosing amount.

Dosing amount's reference value: > 250 ml.

If the dosing amount is below 250 ml during the test this may be due to a clogged dosing unit and it must be cleaned, this can be done using the subtest "Cleaning of dosing unit"

Test conditions:

Procedure:

  1. Connect the test instrument to the diagnostics socket.

  2. Tilt the cab according to the manufacturer's instructions.

  3. Remove the injection line to the dosing unit. See figure below!

  4. Install the injection line and injection valve for suitable engine alternative and connect a collection container with hose that fits on the injection valve. Make sure that the collection container stands securely on the floor.

  5. Check test conditions and start the test.

  6. After the test is done, measure the amount of AdBlue in a measuring beaker and check that it is more than 250 ml.

  7. Remove the test equipment and install a new injection line.

  8. The function is done.

    • If the function fails, check the test conditions and repair any faults.