Test condition:
Engine running
No faults stored
No leaks in the exhaust system
All electrical loads switched off
Coolant temperature at least 70 °C
Note:
Used to test the EGR system.
Procedure:
Start the function.
Travel for short while (about 3-4 min). Keep the engine speed at about 1800-3600rpm.
Take your foot off the accelerator suddenly. This way a deceleration is simulated.
The status field will change from "Test off" to "Test on".
The deceleration phase must last for 8 seconds or more.
Status field changes from "Test on" to "Syst. OK".
If the specifications are not attained, interrogate fault memory.
Exit function.