Work procedure

CAUTION: To reduce the risk of accident during road tests, always observe safety precautions. See SAFETY PRECAUTIONS .

Connect diagnostic tester. See CONNECT DIAGNOSTIC TESTER .
Start engine and let run at idle for at least 15 minutes.
Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface.

The following operating conditions must be met during this road test:

Engine speed 1800 to 2200 RPM. See "PID 12: Engine rotations per minute"; MODE 1: CHECK MEASURED VALUES .
Vehicle speed constant 90 km/h. See "PID 13: Vehicle speed"; MODE 1: CHECK MEASURED VALUES .
- Read readiness code. See READ READINESS CODE .