Readiness Code, Generating

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 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 3: Check DTC memory.

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.
- Coolant temperature approx. intake air temperature (10 to 50 degree C), Diagnostic mode 1: Check measured values; PID 5

Procedure
- Connect diagnostic tester Scan Tool Connecting
- Start engine and let run at idle for at least 15 minutes.

Observe the safety precautions that apply to road tests.

- 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 1: Check measuring values; PID 12, engine rotation per minute (RPM).
- Vehicle speed constant 90 km/h, Diagnostic mode 1: Check measuring values; PID 13, Vehicle speed.

- Do not switch off engine and let run at idle for at least 3 minutes.

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 degree 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.
- Read readiness code Readiness Code