GF07.16-P-2003GZ CDI Driving Mode, Function

GF07.16-P-2003GZ CDI Driving Mode, Function
ENGINE 642 in MODEL 164.1, 251.0, 164.8, 251.1 up to model year 2008
/YoM 07
ENGINE 642.9 in MODEL 463 up to 31.5.12

One of the basic tasks of Common Rail Diesel Injection (CDI) in normal driving conditions is to provide engine torque as required by the driver. At the same time, the CDI should provide for ideal smooth running characteristics at the lowest possible fuel consumption and minimal exhaust emissions. To do this, the CDI control unit (N3/9) must adjust the CDI and the air and exhaust system to one another according to the stored performance map data. In addition to normal driving mode, the CDI also controls the following functions through the CDI control unit:
^ Sliding operation
^ Boil protection
^ Exhaust gas recirculation (EGR)
^ Shutting of the refrigerant compressor (A9)

For this purpose, the CDI control unit evaluates the following sensor information:
^ The intake air mass and its temperature via the left hot film MAF sensor (B2/6) with the integrated intake air temperature sensor (B2/6b1) and via the right hot film MAF sensor (B2/7) with the integrated intake air temperature sensor (B2/7b1)
^ The current rail pressure via the rail pressure sensor (B4/6)
^ The current boost pressure via the boost pressure sensor (B5/1)
^ Coolant temperature via the coolant temperature sensor (B11/4)
^ Charge air temperature via the charge air temperature sensor (B17/8)
^ The vacuum in the intake pipe via the pressure sensor downstream of air filter (B28/5) (except for model 463)
^ The vacuum in the intake pipe via the pressure sensor downstream of air filter, right cylinder bank (B28/5) (only on model 463)
^ The driver request via the accelerator pedal sensor (B37)
^ Fuel temperature via the fuel temperature sensor (B50)
^ The engine speed via the crankshaft Hall sensor (B70)
^ The residual oxygen content in the exhaust gas via the O2 sensor upstream of CAT (G3/2)
^ The load condition of the diesel particulate filter (DPF) (with code (474) Particulate filter), via the differential pressure sensor (DPF) (B28/8) (model 164) or the differential pressure sensor (CAT) (B28/8) (model 463)

The CDI control unit is connected to the glow time output stage (N14/3) via the Local Interconnect Network (LIN) and requests the following glow functions as required:
^ Afterglowing
^ DPF glow function, on vehicles with code (474) particulate filter

On model 164, the CDI control unit also communicates with the following control units over the engine compartment CAN (CAN-C), to obtain the related parameters:
^ With instrument cluster (A1), winter tire maximum speed, dynamometer test mode for electronic stability program (ESP(R))
^ With the control unit for the intelligent servo module for DIRECT SELECT (A80), the selector lever position "P" or "N" via the DIRECT SELECT gear selector switch (S16/13)
^ With the ESP control unit (N47-5), e.g. torque request ESP(R), wheel speeds
^ EIS control unit (N73), interface with the interior CAN (CAN B), e.g. for switching status of the air conditioning system
^ With the steering column module (N80), signals from the CC [TPM] switch (S40/4), signal from the left steering wheel gear shifter (S110/2) and right steering wheel gear shifter (S111/2)
^ With the fully integrated transmission control, control unit (VGS) (Y3/8n4), actual gear engaged

On model 463, the CDI control unit also communicates with the following control units over the drive train CAN (CAN-C), to obtain
^ With the instrument cluster, winter tire maximum speed, ESP(R) dynamometer test mode
^ With the electronic selector lever module control unit (N15/5), for selector lever position "P" or "N"
^ With the ESP and BAS control unit (N47-5), for example for ESP(R) torque requests, wheel speeds
^ With the EIS control unit, interface to the Interior CAN, for example for the air conditioning switching status
^ With the steering column tube module, signals from the CC [TPM] switch, signal from the steering wheel gear shifter MINUS (S110/1) and from the steering wheel gear shifter PLUS (S111/1)
^ With the fully integrated transmission control (VGS), the actual gear engaged