The purpose of the test is to check that the system delivers the correct amount of Adblue during a certain time.
Before running the dosing test, "Starting SCR operation, test" must be finished.
To avoid serious damage to the aftertreatment system the dosing module must be removed from the inlet pipe. The module should hang freely in its connections. Screws for the dosing module shall be installed back in the module and fastened with nuts on the back of the heat shield to prevent the dosing module from leaking.
Place a collection container under the dosing module to collect the Adblue that will be dosed.
The test takes approx. 2 minutes and, depending on engine type, the dosing amount shall be according to the table below. Use a measuring beaker to check the dosing amount.
During the test the working pressure shall be approx. 500 kPa.
After the test has been finished the dosing module shall be reinstalled in the inlet pipe and the engine should be run at idle for awhile and then turned off. This ensures adequate afterventilation of the SCR-system.
Adblue may irritate skin and may react aggressively with electronic components.
Test conditions:
"Starting SCR operation, test" is finished.
Parking brake applied.
Engine off.
Ignition on.
Dosing module disconnected from inlet pipe.
Adblue in reservoir.
Battery voltage above 20V.
Procedure:
Start the function.
Select to start or cancel the test.
Check the working pressure while the test is in progress.
Check status of the test.
The function is done.
If the function fails, check the test conditions and repair any faults.
5-litre engine | Euro 4-Euro 5 Incentive | 100 g | 86-96 ml | +/- 5% |
5-litre engine | Euro 5 | 200 g | 173-192 ml | +/- 5% |
7-litre engine | Euro 4-Euro 5 Incentive | 100 g | 86-96 ml | +/- 5% |
7-litre engine | Euro 5 | 200 g | 173-192 ml | +/- 5% |
11-litre engine | Euro 4-Euro 5 Incentive-Euro 5 | 200 g | 173-192 ml | +/- 5% |
13-litre engine | Euro 4-Euro 5 Inventive-Euro 5 | 300 g | 260-288 ml | +/- 5% |