Component description for CDI control unit - GF07.16-P-6000OL
ENGINE 646.8 in MODEL 204.0 as of model year 09/AEJ 08
ENGINE 646.8 in MODEL 204.2 as of model year 09/AEJ 08
Location
The CDI control unit is located in the right side of the engine compartment at the rear.
Task
The tasks of the CDI control unit are subdivided into the following partial tasks:
- Controlling of the common rail diesel injection (CDI) function
- Input and output signals
Controlling of the common rail diesel injection (CDI) function
The CDI control unit actuates the following functions:
- Fuel supply
- Glow functions
- Injection control
- Exhaust gas cleaning
- Boost pressure control
- Refrigerant compressor cutout (A9)
- Shutoff control
The CDI control unit is equipped with a fault memory, which can be read out via STAR DIAGNOSIS.
Input and output signals
Signal inputs and outputs
Direct input signals
- Circuit 30
- Circuit 31
- Circuit 87
- Oil temperature sensor (B1)
- Hot film MAF sensor (B2/5)
- Intake air temperature sensor (B2/5b1)
- Rail pressure sensor (B4/6)
- Boost pressure sensor (B5/1)
- Camshaft Hall sensor (B6/1)
- Coolant temperature sensor (B11/4)
- Charge air temperature sensor (B17/8)
- Temperature sensor downstream of catalytic converter (B19/8), on vehicles with code (474) Particulate filter
- Temperature sensor upstream of turbocharger (B19/11)
- Pressure sensor downstream of air filter (B28/5)
- Pressure differential sensor (DPF) (B28/8), on vehicles with code (474) Particulate filter
- Accelerator pedal sensor (B37)
- Fuel temperature sensor (B50)
- Exhaust back pressure sensor (B60)
- Oxygen sensor upstream of catalytic converter (G3/2)
- Crankshaft position sensor (L5)
- Oil level check switch (S43)
In addition, the following sensor is installed in the CDI control unit:
- Internal atmospheric pressure sensor, for altitude adaptation
Direct output signals
- Heater for oxygen sensor upstream of CAT
- Throttle valve actuator (M16/5)
- Inlet port shutoff switchover valve (Y83)
- Starter circuit 50 relay (N10/1kM)
- Fuel pump relay (N10/2kD)
- Vent line heater element (R39/1)
- Exhaust gas recirculation actuator (Y27/9)
- Pressure regulator valve (Y74)
- Cylinder 1 fuel injector (Y76/1)
- Cylinder 2 fuel injector (Y76/2)
- Cylinder 3 fuel injector (Y76/3)
- Cylinder 4 fuel injector (Y76/4)
- Boost pressure actuator (Y100/1)
- Quantity control valve (Y94)
- Exhaust gas recirculation cooler bypass switchover valve (Y85), on vehicles with transmission 716.6 except code (474) Particulate filter
Chassis CAN signals
- Instrument cluster (A1), to actuate the preglow indicator lamp (A1e16), and the engine diagnosis indicator lamp (A1e58)
- Electronic Stability Program control unit (N30/4)
- Front SAM control unit with fuse and relay module (N10/1), as interface with the interior
- Electronic ignition lock control unit (N73)
Drive train CAN signals
- Electronic selector lever module control unit (N15/5), with transmission 722.6
- Electronic transmission control, control unit (N15/3), with transmission 722.6
Drive LIN signals
- Alternator (G2)
- Glow output stage (N14/3), to control various glow functions and send system errors
| Wiring diagram for common rail diesel injection (CDI) control unit | Body side | PE07.16-P-2101-99FAC | |
| Engine side | PE07.16-P-2101-99FAD |