Completing a TRIP

Check all diagnostic functions as follows.

To complete a TRIP as fast as possible follow a special driving schedule.

• If the engine control module (ECM) has been without power the engine must be started a few times before the test is carried out
• If the vehicle has been without power and misfire-related diagnostic trouble codes (DTCs) are being verified, a flywheel adaptation must be carried out before verification. See Misfire diagnostics under Design and Function.
• The test must take place on a road with little traffic where it is possible to drive slowly and stop at the side of the road
• The air conditioning (A/C) can be on when the engine is running at part load but must be switched off before the engine is run at idle speed
• For all diagnostics to be carried out, the engine coolant temperature (ECT) should not be above 25° C when the engine is started before the test
• Ensure that there are no diagnostic trouble codes (DTCs) stored in the system before carrying out verification
• Start the engine. Drive according to driving schedule.

Driving schedule: 

• Start the engine
• shift gear selector to drive
• accelerate gently to 1500-2000 RPM
• drive for 5 minutes at 1500-2000 RPM
• run the engine at idle speed for 70 seconds
• drive engaged, air conditioning (A/C) off
• drive for 6 minutes at 1500-2000 RPM
• run the engine at idle speed for 40 seconds
• drive engaged
• air conditioning (A/C) off
• drive for 5 minutes at 1500-2000 RPM
• run the engine at idle speed for 50 seconds
• drive for 5 minutes at 1500-2000 RPM
• Engine brake from 4000 RPM to approximately 1300 RPM a few times.
  NOTE: Do not use the accelerator pedal (AP) during engine braking.