Readiness Code, Generating

Prerequisites

The respective fuses of the Motronic fuel injection and ignition system must be OK: → Electrical Wiring Diagrams, Troubleshooting and Component Locations
Battery voltage must be at least 12.5 volts.
All electrical consumers such as, lights and rear window defroster 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 03 - Read DTC Memory .

Let vehicle cool off with the ignition switched off until the following conditions are met:

Intake air temperature 10 to 50 C → Diagnostic Mode 01 - Read Current System Data ; PID 15
Coolant temperature approx. intake air temperature (10 to 50 C) → Diagnostic Mode 01 - Read Current System Data ; PID 5

Procedure

Observe safety precautions that apply to road tests → Safety Precautions .

Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface.

Engine speed approx. 1800 to 2200 RPM → Diagnostic Mode 01 - Read Current System Data ; PID 12, engine rotations per minute (RPM)
Vehicle speed constant 90 km/h → Diagnostic Mode 01 - Read Current System Data ; PID 13, Vehicle speed

Secondary Air Injection (AIR) system will be checked during this idle phase.

Switch off engine for at least 30 minutes so that coolant temperature can drop to about a minimum of 10 C.
Start engine and let run at least 2 minutes at idle.

Engine coolant temperature sensor will be checked during this idle phase.

Observe the safety precautions that apply to road tests → Safety Precautions .