To do this, the block reads the values of the following variables.
- Air flow and temperature data from the incoming air mass sensor (B2/5) (further - MAF sensor) and from the air temperature sensor built into the MAF sensor (B2/5b1) (for engines with code MF4).
- Current pressure value in the HPTC from the pressure sensor (B4/6).
- Current values of boost pressure from the sensor (B5/1) and charge air temperature from the sensor (B 17/9).
- Coolant temperature from the sensor (B11/4).
In addition, the ECU CDI is connected (CAN-C) (further in the text, the multiplex networks through which communication is carried out are indicated in brackets in a similar manner) with the following control units to obtain the information listed below.
- With instrument cluster (Al) (CAN-C - CAN-B) to provide a speed limiting mode on winter tyres or a traction control mode for the ESP system
- With the ETS control unit (EGS) for determining the automatic transmission gear number.
The CDI ECU performs the following control functions in driving mode:
- fuel supply control;
- boost control;
- emission control (MF8 and MF4) (further in the text, the codes for the design of engines with emission restrictions are indicated in brackets in a similar manner (see at the beginning of the section));
- disabling the air conditioner compressor (A9).
In this mode, the block receives the following information.
- Accelerator pedal sensor signal via CAN-C multiplex network (B37/3).
- Fuel temperature sensor signal (B50).
- Signal from the pressure sensor in the high pressure fuel system (B4/6).
- Input signal (in the converter of the exhaust gas) oxygen sensor (G3/2) (MF4).
- Engine speed signal via separate circuit (L5).
- Signal about the position of the automatic transmission selector from the gear selector unit (N15/5).
- Wheel speed sensor signals from the ESP control unit (N30/4).
- Coolant temperature sensor signal via a separate line (B11/4).