(Component Description For CDI Control Unit - GF07.16-P-6000ORC)
Engine 654.9 in model 213 (except 213.016/216)
up to model year 2021
Engine 654.9 in model 238
up to model year 2021
View of the engine from above
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 control
- Electronic accelerator
- Diagnosis and fault storage
- Drive authorization system and immobilizer
- Heat management j
- 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 | - | - |
| Circuit 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) | - | - |
| Boost pressure sensor (B5/1) | - | - |
| Boost pressure sensor for low-pressure exhaust gas turbocharger (B5/4) (with code M014 (Uprated engine)) | - | - |
| Camshaft Hall sensor (B6/1) | - | - |
| Coolant temperature sensor (B11/4) | - | - |
| 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 ATL (B19/11) | - | - |
| DPF differential pressure sensor (B28/8) | - | - |
| Low pressure EGR differential pressure sensor (B28/18) | - | - |
| Engine oil fill level sensor (B40/6) | - | - |
| Engine oil pressure sensor (B42) | - | - |
| 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) | - |
| Engine compartment circuit 15 relay (K40/8kG) | - | - |
| Throttle valve actuator (M16/6) | Throttle valve actuator (M16/6) | - |
| - | Boost pressure control flap actuator (M16/7) (with code M014 (Uprated engine)) | - |
| - | 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) | - |
| - | High-pressure exhaust gas recirculation actuator (Y27/8) | - |
| Boost pressure control pressure transducer (Y31/5) (with code M014 (Uprated engine)) | - | |
| - | 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) | - |
| - | Boost pressure regulator (Y77/1) (except code M014 (Uprated engine)) | - |
| - | Exhaust gas recirculation cooler bypass switchover valve (Y85) | - |
| - | Exhaust gas flap switchover valve (Y93) (with code M014 (Uprated engine)) | - |
| - | Quantity control valve (Y94) | - |
| - | 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 train CAN (CAN C1) | 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), chassis 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 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) |
| AIR BODY CONTROL, control unit (N51/3) (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 (N69/1) | - | 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 connection (X11/4) | Diagnostics connection (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 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) |
| 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) |
| 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 variants of the engine management, for exampled country and exhaust variants, are activated with XD over the variant coding.
Assembly operations
Ensure before unplugging the connector on the CDI control unit that the ignition is switched off and processor run-on has ended. This is to prevent damage to the CDI control unit and save errors in the control units linked to the CAN.
| Wiring diagram of common rail diesel injection system control unit (CDI) | PE07.16-P-2101-97DBC | ||
| PE07.16-P-2101-97DBD | |||
| PE07.16-P-2101-97DBE |