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.
- Intake air temperature 5 to 35 degrees C, Diagnostic mode 1: Check measured values; PID 15: Intake Air Temperature (IAT).
- Throttle valve angle 12.0 to 16.0 %, Diagnostic mode 1: Check measured values; PID 17: Throttle valve position (absolute).

Procedure
- Connect diagnostic tester.
- Perform a road test.

The following operating condition must be met during this road test:
- Coolant temperature must reach at least 80 degrees C, Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature.

Observe the safety precautions that apply to road tests.

Let vehicle cool off with the ignition switched off until the following condition is met:
- Coolant temperature approx. intake air temperature (5 to 35 degrees C), Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

- Perform a road test anew.

The following operating conditions must be met during this road test:
- Accelerate vehicle uniformly, not at Wide Open Throttle (WOT).

- Drive for 10 minutes in the highest gear or in the highest driving mode on a level driving surface at a constant speed in the range of 65 to 80 km/h at an engine speed of 2000 to 2500 RPM.


NOTE:
- Vehicle speed, Diagnostic mode 1: Check measuring values; PID 13, Vehicle speed.
- Engine speed, Diagnostic mode 1: Check measuring values; PID 12, engine rotations per minute (RPM).


- After 10 minutes, downshift until an engine speed of 2800 to 3500 RPM has been reached.
- Drive in deceleration mode at a speed up to approx. 1800 RPM.
- Park vehicle and let engine run at idle for 3 minutes.
- Accelerator pedal must not be operated during this time.

- Perform a road test anew.

The following operating conditions must be met during this road test:
- Accelerate vehicle uniformly, not at Wide Open Throttle (WOT).
- Drive for 10 minutes in the highest gear or in the highest driving mode on a level driving surface at a constant speed in the range of 65 to 80 km/h at an engine speed of 2000 to 2500 RPM.
- Park vehicle and let engine run at idle for 3 minutes.
- Accelerator pedal must not be operated during this time.

- Read readiness code.

If a 1 is displayed instead of a 0 in the 8-digit number block:
- Perform a road test anew.

The following operating conditions must be met during this road test:
- Drive for 10 minutes in the highest gear or in the highest driving mode on a level driving surface at a constant speed in the range of 65 to 80 km/h at an engine speed of 2000 to 2500 RPM.
- Park vehicle and let run at idle for 3 minutes.
- Accelerator pedal must not be operated during this time.

- Read readiness code.

In 8-digit number block:
- Display position 5: Secondary Air Injection (AIR) system
and/or
Display position 6: EVAP canister system a 1 instead of 0 is displayed:
- Repeat complete procedure.