Drivetrain Control Unit, Component Description - GF54.21-P-2141MNF
Engine 176.9 in Model 463
as of Model year 2016 up to Model year 2019
Vehicle view of Model 463.2
Location
The powertrain control unit is located in the front passenger footwell and it is fastened to the engine compartment's partition wall.
Tasks
The powertrain control unit has the following tasks:
- Reading in of signals
- Evaluation of input factors
- Actuation of components
- Sending signals
The powertrain control unit serves as an interface (gateway) between the ME-SFI control unit (N3/10) and the connected bus systems.
Reading in of signals
The input factors are read in via the following connections:
- Direct line
- Drive-train LIN (LIN C3)
- Drive train CAN (CAN C)
- Chassis CAN 1 (CAN E1)
Direct line
The powertrain control unit reads in the signal of the following component over direct lines:
| Component | Signals |
|---|---|
| Fan motor (M4/7) | Fault message (pulse width modulated signal) |
Drivetrain LIN
The powertrain control unit also reads in the following signals over the drive-train-LIN:
| Component | Signals |
|---|---|
| Low-temperature circuit circulation pump 1 (M43/6) | Fault message, signal |
| Low temperature circuit circulation pump 2 (M43/7) | Fault message, signal |
| Engine cooling air flap actuator motor (M107) | Fault message, signal |
Drive train CAN
The powertrain control unit also reads in the following signals over the drive train CAN:
| Control unit | Signals |
|---|---|
| Intelligent servo module for DIRECT SELECT (A80) | Selector lever position, status Gear range, status Diagnostic data |
| ME-SFI [ME] control unit (N3/10) | Engine speed, signal |
| Engine running, status | |
| Accelerator pedal, status | |
| Engine torque, signal | |
| Diagnostic data | |
| Fuel system control unit (N118) | Fuel level, signal |
| Diagnostic data | |
| Transfer case control unit (N15/7) | Transfer case, status |
| Front differential lock, status | |
| Center differential lock, status | |
| Rear differential lock, status | |
| Diagnostic data | |
| Transmission oil auxiliary pump control unit (N89) (with code MJ7 (ECO start/stop function)) | Diagnostic data |
| DIRECT SELECT INTERFACE (N150) | Gear range, status |
| Transmission mode. Status | |
| Diagnostic data | |
| Fully integrated transmission control unit (Y3/8n4) | Gear range, status |
| Selector lever position, status | |
| Diagnostic data |
Chassis CAN 1
The powertrain control unit also reads in the following signals over chassis CAN 1:
| Control unit | Signals |
|---|---|
| Instrument cluster (A1) | Vehicle speed, signal |
| DISTRONIC electric controller unit (A89) (with code EZ9 (DISTRONIC PLUS)) | Increase engine torque, request |
| Reduce engine torque, request | |
| Supplemental Restraint System control unit (N2/10) | Crash, signal |
| Driver seat belt buckle, status | |
| SAM control unit (N10) | Outside temperature, signal |
| Engine hood contact switch, status | |
| Engine start, request (with code MJ7 (ECO start/stop function)) | |
| Engine stop ban, request (with code MJ7 (ECO start/stop function)) | |
| A/C control and operating unit (N22/7) | Air conditioning, status |
| Engine start, request (with code MJ7 (ECO start/stop function)) | |
| Engine stop ban, request (with code MJ7 (ECO start/stop function)) | |
| Electronic Stability Program control unit (N30/4) | Wheel speed, signal |
| Brake pedal, status | |
| Increase engine torque, request | |
| Reduce engine torque, request | |
| Engine start, request (with code MJ7 (ECO start/stop function)) | |
| Engine stop ban, request (with code MJ7 (ECO start/stop function)) | |
| Adaptive damping system control unit (N51/5) (with code A20 (Suspension with adaptive damping adjustment)) | LED in Comfort/Sport button, request |
| Electronic ignition lock control unit (N73) | Circuit status |
| Steering column tube module control unit (N80) | Steering wheel angle, signal |
| Steering wheel velocity, signal |
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.
Actuation of components
The powertrain control unit actuates the following component over a direct line:
| Component | Note |
|---|---|
| Fan motor | pulse width modulated signal |
Sending signals
The signals are transmitted via the following connections:
- Drivetrain LIN
- Drive train CAN
- Chassis CAN 1
Drivetrain LIN
The powertrain control unit also sends the following signals over the drive-LIN:
| Component | Signal |
|---|---|
| Low temperature circuit circulation pump 1 | Circulation pump, request |
| Low-temperature circuit circulation pump 2 | Circulation pump, request |
| Engine cooling air flap actuator motor | Air flap, request |
Drive train CAN
The powertrain control unit also sends the following signals over the drive-CAN:
| Control unit | Signals |
|---|---|
| Intelligent servo module for DIRECT SELECT | Circuit status |
| Engine running, status | |
| Brake pedal, status | |
| Drive authorization, status | |
| ME-SFI [ME] control unit | Circuit status |
| Central locking, status | |
| Brake, status | |
| Brake pedal, status | |
| ESP®, status | |
| Steering wheel angle sensor, status | |
| Steering wheel angle, signal | |
| Steering wheel velocity, signal | |
| Gear range, signal | |
| Wheel speed, signal | |
| Brake pedal, status | |
| Outside temperature, signal | |
| Engine start/stop, status (with code MJ7 (ECO start/stop function)) | |
| Comfort/Sport button, status | |
| Transmission mode, signal | |
| Fuel pump control unit | Circuit status |
| Engine running, status | |
| Outside temperature, signal | |
| Transfer case control unit | Circuit status |
| Brake, status | |
| Brake pedal, status | |
| Front differential lock, request | |
| Center differential lock, request | |
| Rear differential lock, request | |
| Low Range button, status | |
| Transmission oil auxiliary pump control unit (with code MJ7 (ECO start/stop function)) | Circuit status |
| DIRECT SELECT INTERFACE | Circuit status |
| Fully integrated transmission Control control unit | Circuit status |
| Steering wheel angle, signal | |
| Steering wheel velocity, signal | |
| Brake, status | |
| Brake pedal, status | |
| ESP®, status | |
| Gear range, signal | |
| Transmission mode, signal | |
| Wheel speed, signal | |
| Engine start/stop, status (with code MJ7 (ECO start/stop function)) |
Chassis CAN 1
The powertrain control unit also sends the following signals over chassis CAN 1:
| Control unit | Signal |
|---|---|
| Instrument cluster | Indicator lamp, request |
| Display message, request | |
| SAM control unit | Alternator, status |
| Tank venting, status | |
| Climate Control control and operating unit | A/C system, request |
| Electronic Stability Program control unit | Engine speed, signal |
| Accelerator pedal, status | |
| Engine running, status | |
| Current engine torque, signal | |
| Gear range, signal | |
| Transmission mode, signal | |
| Steering column module control unit | Engine running, status |
| Wiring diagram for powertrain control unit | PE54.21-P-2141-97ZGA |