Readiness Code, Generating

Readiness Code, Generating

Test requirements:
- Fuses for engine electronics OK
- Ground (GND) connections at engine and transmission OK
- Battery voltage at least 12.5 V
- Exhaust system free of leaks.
- Vehicles with automatic transmission: Selector lever in position "P" or "N".
- Electrical consumers switched off (radiator fan must NOT run during test).
- A/C switched off.
- No DTCs in DTC memory; check DTC memory, see "Mode 3: Check DTC memory". Diagnostic Mode 3: Check DTC Memory
- Throttle valve angle 12.0 to 16.0 %, see "Mode 1: Check measuring values"; "PID 17: Throttle valve position (absolute)". Diagnostic Mode 1: Check Measured Values

Let vehicle cool off with the ignition switched off until the following conditions are met:
- Intake air temperature 10 to 50 degrees C, see "Mode 1: Check measuring values"; "PID 15: Intake air temperature". Diagnostic Mode 1: Check Measured Values
- Coolant temperature approximately Intake Air Temperature (10 to 50 degrees C), see "Mode 1: Check measuring values"; "PID 05: Coolant temperature". Diagnostic Mode 1: Check Measured Values

Work procedure


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


- Connect diagnostic tester. Diagnostic Tester, Connecting
- 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 "Mode 1: Check measuring values"; "PID 12: Engine rotations per minute". Diagnostic Mode 1: Check Measured Values
- Vehicle speed constant 90 km/h, see "Mode 1: Check measuring values "; "PID 13: Vehicle speed". Diagnostic Mode 1: Check Measured Values

- Read readiness code. Read Readiness Code