Location of elements of the TDV6 engine management system
| Item name | Spare part number | Description |
| 1 | - | knock sensors |
| 2 | Fuel rail pressure sensor | |
| 3 | High pressure fuel pump | |
| 4 | Cooler/EGR valve (exhaust gas recirculation systems) | |
| 5 | Nozzle | |
| 6 | Boost pressure control | |
| 7 | CKP sensor (crankshaft position) | |
| 8 | Oil temperature sensor | |
| 9 | CMP sensor (camshaft position) | |
| 10 | MAF sensor (mass air flow) /IAT (air intake temperature) | |
| 11 | charge air temperature sensor | |
| 12 | glow plugs | |
| 13 | Electronic throttle with MAP sensor (manifold absolute pressure) | |
| 14 | wiring harness for glow plugs |
| Item name | Spare part number | Description |
| 1 | Power relay | |
| 2 | Transfer box controller | |
| 3 | ECM (the engine control unit) | |
| 4 | APP sensor (accelerator pedal position) | |
| 5 | Stoplight switch | |
| 6 | clutch switch | |
| 7 | ABS control unit (anti-lock brakes) |
Diagram of the TDV6 engine management system
NOTE: A = Hard wired connection; D = CAN bus (local area network of controllers)
| Item name | Spare part number | Description |
| 1 | glow plugs | |
| 2 | Control junction box cooling fan | |
| 3 | Vacuum Actuator Disconnect Port | |
| 4 | ABS control unit (anti-lock brakes) | |
| 5 | Dashboard | |
| 6 | TCM (transmission control unit) , | |
| 7 | RCM (airbag and seat belt control unit) | |
| 8 | Transfer box controller | |
| 9 | Differential controller | |
| 10 | Parking brake controller | |
| 11 | Terrain Response™ Controller | |
| 12 | boost pressure controller | |
| 13 | Cooler/EGR valve (exhaust gas recirculation systems) | |
| 14 | Generator | |
| 15 | Steering wheel-mounted cruise control buttons | |
| 16 | coil spring | |
| 17 | ECM (the engine control unit) | |
| 18 | Electronic Throttle Valve | |
| 19 | Injectors |
NOTE: A = Hard wired connection
| Item name | Spare part number | Description |
| 1 | Power relay | |
| 2 | CKP sensor (crankshaft position) | |
| 3 | CMP sensor (crankshaft position) | |
| 4 | ECT sensor (coolant temperature) | |
| 5 | APP sensor (accelerator pedal position) | |
| 6 | MAF sensor (mass air flow) /IAT (intake air temperature) | |
| 7 | Engine oil temperature sensor | |
| 8 | Fuel rail temperature sensor | |
| 9 | boost pressure sensor | |
| 10 | charge air temperature sensor | |
| 11 | RCM (airbag and seat belt control unit) | |
| 12 | Stoplight switch | |
| 13 | knock sensors | |
| 14 | ECM (the engine control unit) | |
| 15 | Fuse 60P | |
| 16 | Fuse 25P | |
| 17 | ignition switch | |
| 18 | Fuse 11E |
Review
The TDV6 engine is equipped with an electronic engine management system (EDC) manufactured by Siemens. This system is controlled by eCm (the engine control unit) and is able to control, adjust and fine-tune fuel injection. ECM (the engine control unit) uses input signals from various sensors and precisely controls the actuators to ensure optimal dynamic performance under all driving conditions.
ECM (the engine control unit) controls fuel supply to all 6 cylinders through a common rail injection system (CR). The common rail system consists of a very high pressure fuel rail and six electronically controlled injectors. The fuel manifold is located close to the injectors to help maintain full system pressure at each injector at all times.
ECM block (the engine control unit) uses the control-by-wire principle to control acceleration. There are no links between the engine and the accelerator pedal ("untied" from the engine pedal). Commands from the accelerator pedal are sent to the ECM (the engine control unit) through 2 potentiometers, which are located in the throttle position sensor. ECM (the engine control unit) uses 2 signals to determine the position, speed and direction of pedal movement. Then ECM (the engine control unit) uses this data, along with other engine information from other sensors, to achieve optimal engine response.
ECM (the engine control unit) processes the following incoming information:
- CKP sensor (crankshaft position)
- CMP sensor (crankshaft position)
- Manifold air temperature and pressure
- Coolant temperature
- Oil temperature
- Intake air flow and temperature
- Fuel rail temperature
- knock sensors (one per bank of cylinders)
ECM control outputs (the engine control unit) are fed to the following sensors and actuators:
- nozzles
- Viscous fan clutch solenoid
- Throttle with electronic control
- Turbocharger with electronic vane control
- Disable ports
- Fuel pressure control valve
- Fuel control valve
- Control junction box fan
- engine mounts
- Electronic EGR system (exhaust gas recirculation systems)
- glow plugs
Comments on this article