(Component Description For CDI Control Unit - GF07.16-P-6000ORF)
Engine 654.9 in Model 205 (except 205.013/213), 253 (except 253.311/911)
Engine 656.9 in Model 253
View of Engine from above, Engine 654 shown
Location
The CDI control unit is on the air filter housing.
Tasks
The CDI control unit performs the following tasks:
- Controlling the Engine basic functions
- Reading in of signals
- Evaluation of input factors
- Output of signals and actuation of components
The CDI control unit operates in an electrical network of sensors and actuators to form the Engine management system for Engine 654. The CDI control unit also acts as the interface (gateway) between the three connected CAN bus systems.
Controlling the Engine basic functions
- Fuel supply
- Glow system
- Injection quantity control
- Electronic accelerator
- Diagnosis and fault storage
- Drive authorization system and immobilizer
- Heat management
- Exhaust gas recirculation
- Exhaust treatment
- Torque coordination
- Engine management Start-Stop function
Reading in of signals
Input factors are read in over the following connections:
- Direct line
- Drive-LIN (LIN C1)
- Engine CAN (CAN C)
- Drive train CAN (CAN C1)
- Drive train sensor CAN (CAN I)
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.
Output of signals and actuation of components
Initial parameter are output over the following connections:
- Direct line
- Drive train LIN
- Engine CAN
- Drive train CAN
- Drive train sensor CAN
The electronic ignition lock control unit (N73) is the central interface (Gateway) for exchanging the function-relevant data of the control units that are connected to the various CAN bus systems.
Input factors and initial parameters for the following assembly parts are read in or output over direct lines by the CDI control unit and are needed by the Engine management:
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Terminal 15 | - | - |
| Circuit 30 (fused) | - | - |
| Circuit 31 | - | - |
| Terminal 87 | - | - |
| Engine oil temperature sensor (B1) | - | - |
| Hot film mass air flow sensor (B2/5) | - | - |
| Intake air temperature sensor (B2/5b1) | - | - |
| High pressure fuel pressure sensor (B4/6) | - | - |
| Fuel pressure sensor (B4/7) | - | - |
| Boost pressure sensor (B5/1) | - | - |
| Low-pressure exhaust gas turbocharger boost pressure sensor (B5/4) (for 2-stage charging) | - | - |
| Camshaft Hall sensor (B6/1) | - | - |
| Coolant temperature sensor (B11/4) | - | - |
| Temperature sensor downstream of the SCR catalytic converter (B16/27) | - | with code 971 (exhaust system with DPF Generation 1.5) |
| Charge air temperature sensor (B17/8) | - | - |
| Temperature sensor upstream of catalytic converter (B19/7) | - | - |
| Temperature sensor upstream of Diesel particulate filter (B19/9) | - | - |
| Temperature sensor upstream of exhaust gas turbocharger (B19/11) | - | - |
| DPF differential pressure sensor (B28/8) | - | - |
| Low pressure EGR differential pressure sensor (B28/18) | - | - |
| Oil pressure sensor (B40/4) | - | - |
| Engine oil fill level sensor (B40/6) | - | - |
| Fuel temperature sensor (B50) | - | - |
| Exhaust pressure sensor (B60) | - | - |
| Crankshaft Hall sensor (B70) | - | - |
| Low pressure exhaust gas recirculation temperature sensor (B157/2) | - | - |
| - | Starter circuit 50 relay (K40/8kH) | - |
| Circuit 87M relay (K40/8kN) | Circuit 87M relay (K40/8kN) | - |
| Circuit 15 relay (K40/8kG) | - | - |
| Throttle valve actuator (M16/6) | Throttle valve actuator (M16/6) | - |
| - | Boost pressure control flap actuator (M16/7) (Engine 654 with 2-stage charging) | - |
| - | Intake port shutoff actuator motor (M55) | - |
| Supplemental Restraint System control unit (N2/10) | - | Direct crash signal |
| - | Fuel system control unit (N118) | - |
| - | Vent line heater element (R39/1) | - |
| - | Coolant thermostat heating element(R48) | - |
| - | Low pressure exhaust gas recirculation actuator (Y27/7) | Engine 654 |
| - | High-pressure exhaust gas recirculation actuator (Y27/8) | Engine 654 |
| - | Boost pressure control pressure transducer (Y31/5) | Engine 654 with 2-stage charging |
| CAMTRONIC actuator, exhaust cylinders 1 and 2 (Y49/22) | CAMTRONIC actuator, exhaust cylinders 1 and 2 (Y49/22) | Engine 656 |
| Cylinder 3 and 4 exhaust CAMTRONIC actuator (Y49/23) | Cylinder 3 and 4 exhaust CAMTRONIC actuator (Y49/23) | Engine 656 |
| Cylinder 5 and 6 exhaust CAMTRONIC actuator (Y49/24) | Cylinder 5 and 6 exhaust CAMTRONIC actuator (Y49/24) | Engine 656 |
| - | Pressure regulating 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) | - |
| - | Cylinder 5 fuel injector (Y76/5) | Engine 656 |
| - | Cylinder 6 fuel injector (Y76/6) | Engine 656 |
| Boost pressure control pressure transducer (Y77/1) | Boost pressure control pressure transducer (Y77/1) | - |
| - | Exhaust gas recirculation cooler bypass switchover valve (Y85) | - |
| - | Low-pressure exhaust gas recirculation actuator (Y87/5) | Engine 656 |
| - | High-pressure exhaust gas recirculation actuator (Y87/6) | Engine 656 |
| - | Exhaust flap switchover valve (Y93) | Engine 654 with 2-stage charging |
| - | Quantity control valve (Y94) | - |
| - | Boost pressure control pressure transducer (Y100/2) | Engine 656 |
| - | Engine oil pump valve (Y130) | - |
| - | Oil spray nozzle shutoff valve (Y131) | - |
| - | Coolant pump switchover valve (Y133) | - |
Input and initial parameters for the following assembly parts and control units are transmitted or received by the CDI control unit via the LIN or CAN and are needed by the Engine management system:
| Input factors via the drive-LIN (LIN C1) | Initial parameters via the drive-LIN (LIN C1) | Supplemental information |
|---|---|---|
| Alternator (G2) | Alternator (G2) | - |
| Glow output stage (N14/3) | Glow output stage (N14/3) | - |
| Input factors via drive train CAN (CAN C1) | Initial parameters via drive CAN (CANC1) | Supplemental information |
|---|---|---|
| Fuel system control unit (N118) | Fuel system control unit (N118) | - |
| Fully integrated transmission control unit (Y3/8n4) | Fully integrated transmission control unit (Y3/8n4) | - |
| Powertrain control unit (N127) | Powertrain control unit (N127) | - |
| Input factors over Engine CAN (CAN C) | Initial parameters via Engine CAN (CAN C) | Supplemental information |
|---|---|---|
| Instrument cluster (A1) | Instrument cluster (A1) | Via user interface-CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Head unit (A26/17) | - | Via user interface-CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Audio/COMAND® control panel (A40/9) | - | Via Telematics CAN (CAN A), head unit (A26/17), user interface CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Supplemental Restraint System control unit (N2/10) | - | Via user interface-CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Front SAM control unit (N10/6) | - | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Climate control control unit (N22/1) | - | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Electronic Stability Program control unit (N30/4) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Airmatic® control unit (N51/3) (model 205 with code 489 (Airmatic®) and code 483 (Advanced Agility package)) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Air Body Control control unit (N51/3) (model 253 with code 489 (Air Body Control)) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Mercedes-Benz Intelligent Drive control unit (N62/4) (with code 23P (Driving assistance package)) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Left front door control unit (N691) | - | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Steering column tube module control unit (N80) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Powertrain control unit (N127) | Powertrain control unit (N127) | - |
| Diagnostics connector (X11/4) | Diagnostics connector (X11/4) | Via diagnostic CAN (CAN D), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Input factors via drive train sensor CAN (CAN I) | Initial parameters via drive train sensor CAN (CAN I) | Supplemental information |
|---|---|---|
| NOx sensor control unit upstream of Diesel oxidation catalytic converter (N37/12) | NOx sensor control unit upstream of Diesel oxidation catalytic converter (N37/12) | with code U79 (BlueTEC (SCR) Diesel exhaust treatment Generation 3) |
| NOx sensor control unit downstream of SCR catalytic converter (N37/8) | NOx sensor control unit downstream of SCR catalytic converter (N37/8) | with code U79 (BlueTEC (SCR) Diesel exhaust treatment Generation 3) |
| AdBlue® control unit (N118/5) | AdBlue® control unit (N118/5) | with code U79 (BlueTEC (SCR) Diesel exhaust treatment Generation 3) |
Structure
The housing of the CDI control unit is made of diecast aluminum and the cover is made of corrosion-proof sheet steel. The CDI control unit is water proof and dust proof.
The inside contains the 32-bit measuring and control electronics for the Engine management.
The CDI control unit has an internal atmospheric pressure sensor.
Ground connection
"Circuit 31" ground connection is connected over multiple ground lines to the firewall ground point.
Voltage supply
The CDI control unit is supplied with power by "circuit 30 fused" and also, for ignition on, by "circuit 87". In the operating voltage range it has both short-circuit protection and reversed polarity protection.
Power is supplied through several engaged parallel pins connected in parallel to relieve the electrical connections.
Variants
The Engine management variants, such as national versions and exhaust gas variants, are activated via variant coding.
| Wiring diagram for common rail Diesel injector (CDI) control unit | Engine 654.9 in Model 205 (except 205.013/213) as of model year 2019Plugs 1, 4, 5 | PE07.16-P-2101-97FBK | |
| Engine 654.9 in Model 205 (except 205.013/213) as of model year 2019Connector 2, 3 | PE07.16-P-2101-97FBL | ||
| Engine 654.9 in Model 205 (except 205.013/213) as of model year 2019Plug 6 | PE07.16-P-2101-97FBJ |