Engine / (MR) ECU
Y07.15-0003-01
The Engine control unit (MR)(A6) is an ECU with specific tasks. This controls the fuel injection under various load conditions. This also maintains the operating temperature for the engine to emit less pollutant more fuel efficient. That is by receiving input signals from various sensors and actuating other components accordingly.
The operating condition of the Engine control unit (MR)(A6) is based on input signals from the following sensors:
Crankshaft position sensor(B15)
Camshaft position sensor (B16)
Charge air temperature and boost pressure combination sensor(B111)
Fuel temperature sensor(B10)
Coolant temperature sensor(B65)
Engine oil temperature sensor(B11)
Multiple CAN signals
Input information to Engine control unit (MR)(A6):
Since there are wide range of information which is transferred between every control units, Only the most important input informations are transferred via the Drive control unit (FR)(A3) to Engine control unit (MR)(A6) or from Engine control unit (MR) (A6) to the various other system.
Some are mentioned below:
Drive control (FR)(A3)
Parameterizable Special Module (PSM)
Output information from the engine control (MR)(A6):
The output information which is prepared by the Engine control unit (MR)(A6) is sent via Drive control (FR)(A3) to other electronics of the vehicle. This information is required for calculating the specified engine torque and for displaying various indicators in the instrument (INS).
Engine Management
MR ECU (16-pins) |
A1 | CAN interface (H) |
A2 | CAN interface (L) |
A3 | CAN HF (GND) |
A4 | CAN HF (GND) |
A5 | Battery voltage (+) |
A6 | Battery voltage (-) |
A8 | Terminal 50 (Start) |
A9 | Ground (-ve) |
A10 | Proportioning valve bank (PV1 - 4)1 |
A11 | Ground (-ve) |
A12 | Starter |
A13 | Diagnostics K-line |
A14 | Proportioning valve 31 |
A15 | Terminal 15 (IGN) |
A16 | Proportioning valve 41 |
Y07.15-0012-05
Pin no. | Assignments | Type | In/Out2 |
1 | CAN interface | High line | In/Out2 |
2 | CAN interface | Low line | In/Out2 |
3 | CAN-HF | Ground | |
4 | CAN-HF | Ground | |
5 | Battery voltage | Battery positive | |
6 | Battery voltage | Battery positive | |
8 | Terminal 50 (start) | Signal | In |
9 | Ground (battery negative) | ||
10 | Proportioning valve bank (PV1 - 4)1 | Supply | |
11 | Ground (battery negative) | ||
12 | Starter | High-side actuation | Out |
13 | Diagnostics k-line (ISO) | Signal | In/Out2 |
14 | Proportioning valve 31 | Low-side actuation | Out |
15 | Terminal 15 | Ignition | In |
16 | Proportioning valve 41 | Low-side actuation | Out |
MR ECU (55-pins) |
Y07.15-0013-12
Pin no. | Assignments | Type | In/Out2 |
0 | Heater flange diagnosis | Signal | In |
1 | Camshaft sensor (-) | Feedback | In |
2 | Crankshaft sensor (-) | Feedback | In |
3 | Coolant temperature | In | |
4 | Fuel temperature | Feedback | In |
5 | Passive oil pressure/turbocharger speed, fan speed | Feedback | In |
6 | Active oil pressure sensor | Supply | Out |
7 | Boost Pressure Sensor | Supply | Out |
8 | Not Assigned | Signal | In |
9 | Unit pump bank 2 (B-D-F-H) | Feedback | Out |
10 | Active oil pressure sensor | Feedback | In |
11 | Proportioning valve ground | Feedback | Out |
12 | Proportioning valve bank (PV 1-4)1 | Supply | Out |
13 | Combined input (fuel pressure/FPS/ T6) | Supply | Out |
14 | Fan speed sensor | Supply | Out |
15 | Oil temperature sensor | Feedback | In |
16 | Unit pump bank 1 (A-C-E-G) | Feedback | Out |
17 | Fan speed sensor | Signal | In |
18 | Starter1 | High-side actuation | Out |
19 | Crankshaft sensor (+) | Signal | In |
20 | Camshaft sensor (-) | Signal | In |
21 | Charge air temperature sensor | Feedback | In |
22 | Combined input (fuel pressure/FPS/ T6) | Feedback | In |
23 | Boost Pressure Sensor | Feedback | In |
24 | Turbocharger speed sensor | Signal | In |
25 | Engine service switch - start | Signal | In |
26 | Passive oil pressure sensor/charge air temperature 2 | Signal | In |
27 | Proportioning valve 5 | High-side actuation | Out |
28 | Combined input (fuel pressure/FPS/ T6) | Signal | In |
29 | Boost Pressure Sensor | Signal | Out |
30 | Engine service switch - start/stop | Supply | In |
31 | Not Assigned | Signal | In |
32 | Active oil pressure sensor | Signal | In |
33 | Oil level sensor | Signal | In |
34 | Coolant temperature sensor | Signal | In |
35 | Engine service switch – stop | Signal | In |
36 | Fuel temperature sensor | Signal | In |
37 | Unit pump solenoid valve H (bank 2) | High-side actuation | Out |
38 | Unit pump solenoid valve F (bank 2) | High-side actuation | Out |
39 | Oil temperature sensor | Signal | In |
40 | Proportioning valve 6 | Low-side actuation | Out |
41 | Proportioning valve 31 | Low-side actuation | Out |
42 | Proportioning valve PV6 | Supply | Out |
43 | Proportioning valve 41 | Low-side actuation | Out |
44 | Unit pump solenoid valve D (bank 2) | High-side actuation | Out |
45 | Unit pump solenoid valve B (bank 2) | High-side actuation | Out |
46 | Unit pump solenoid valve G (bank 1) | High-side actuation | Out |
47 | Unit pump solenoid valve E (bank 1) | High-side actuation | Out |
48 | Charge air temperature sensor | Signal | In |
49 | Oil level sensor | Feedback | In / Out |
50 | Proportioning valve 2 | Low-side actuation | Out |
51 | Proportioning valve 1 | Low-side actuation | Out |
52 | Proportioning valve 2 | Supply | Out |
53 | Unit pump solenoid valve C (bank 1) | High-side actuation | In |
54 | Unit pump solenoid valve A (bank 1) | High-side actuation | Out |