With Generic Scan Tool

Readiness Code, Generating

Requirements
- The respective fuses of the Motronic fuel injection and ignition system must be OK.
- Battery voltage must be at least 11.5 volts.
- All electrical consumers like, for example, lights and rear window heating must be switched off.
- If vehicle is equipped with an A/C system, it must be switched off.
- Ground (GND) connections between engine and chassis must be OK.
- There must not be any DTCs stored in DTC memory, Diagnostic mode 3: Check DTC memory.
- Throttle valve angle 12.0 to 16.0 %, Diagnostic mode 1: Check measured values; PID 17: Throttle valve position (absolute)

Let vehicle cool off with the ignition switched off until the following conditions are met:
- Intake air temperature 10 to 50 degree C, Diagnostic mode 1: Check measured values; PID 15: Intake Air Temperature (IAT)
- Coolant temperature approx. intake air temperature (10 to 50 degree C), Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature.

Procedure
- 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 approx. 1800 to 2200 RPM, Diagnostic mode 1: Check measuring values; PID 12, engine rotations per minute (RPM)
- Vehicle speed constant 90 km/h, Diagnostic mode 1: Check measuring values; PID 13, Vehicle speed.

Observe the safety precautions that apply to road tests. Safety Precautions
- Read readiness code. Readiness Code, Function