Range Rover Evoque: Control Diagram, System Operation

Control Diagram

NOTE: A = Hardwired; D = High Speed CAN Bus; O = Local Interconnect Network (LIN) Bus

CONTROL DIAGRAM - SHEET 1 OF 2

Range Rover Evoque. Electronic Engine Controls - GTDi 2.0L Petrol

  1. Battery
  2. Starter motor fuse
  3. Battery Junction Box (BJB)
  4. Starter motor
  5. Generator
  6. Transmission Control Module (TCM)
  7. Cooling fan control module
  8. Air Conditioning (A/C) compressor clutch
  9. Low Pressure (LP) fuel sensor
  10. Oil pressure sensor
  11. Fuel pump metering valve
  12. Ambient temperature sensor
  13. Electric throttle
  14. Knock sensor
  15. Knock sensor
  16. Restraints Control Module (RCM)
  17. Fuel pump module
  18. Fuel Pump Driver Module (FPDM)
  19. Engine Control Module (ECM)
  20. Immobilizer Antenna Unit (IAU)
  21. Stop lamp diagnostic switch
  22. Stop lamp switch
  23. Central Junction Box (CJB)
  24. Accelerator Pedal Position (APP) sensor

CONTROL DIAGRAM - SHEET 2 OF 2

Range Rover Evoque. Electronic Engine Controls - GTDi 2.0L Petrol

  1. Battery
  2. Battery Junction Box (BJB)
  3. Ignition coil (4 off)
  4. Pre-catalyst Heated Oxygen Sensor (HO2S)
  5. Post catalyst HO2S
  6. Purge valve
  7. Variable Camshaft Timing (VCT) solenoid (exhaust)
  8. Variable Camshaft Timing (VCT) solenoid (inlet)
  9. Turbocharger boost pressure and temperature sensor
  10. Turbocharger wastegate control solenoid valve
  11. Air Conditioning (A/C) pressure sensor
  12. Engine Coolant Temperature (ECT) sensor 2 (NAS only)
  13. Engine Coolant Temperature (ECT) sensor 1
  14. Manifold Absolute Pressure (MAP) sensor
  15. Mass Air Flow (MAF) sensor
  16. Camshaft Pos tion (CMP) sensor (exhaust)
  17. Camshaft Pos tion (CMP) sensor (inlet)
  18. Diagnostic socket
  19. Crankshaft Position (CKP) sensor
  20. Engine oil temperature sensor
  21. Fuel injector (4 off)
  22. Engine Control Module (ECM)
  23. Fuel rail pressure sensor
  24. Diagnostic Monitoring Tank Leakage (DMTL) pump

System Operation

OPERATION

The ECM (engine control module) processes inputs from the following sources:

The ECM outputs controlling signals to the following sensors and actuators:

The ECM is connected to the engine sensors which allow it to monitor the engine operating condit ons. The ECM processes these signals and decides the actions necessary to maintain optimum engine performance in terms of driveability, fuel efficiency and exhaust emissions. The memory of the ECM is programmed with instructions for how to control the engine, this known as the strategy. The memory also contains data in the form of maps which the ECM uses as a basis for fueling and emission control. By comparing the information from the sensors to the data in the maps, the ECM is able to calculate the various output requirements.

The ECM contains an adaptive strategy which updates the system when components vary due to production tolerances or ageing. Some sensors receive a regulated 5 Volt supply from the ECM.

The ECM receives a vehicle speed signal on a CAN (controller area network) bus from the ABS (anti-lock brake system) module. Vehicle speed is an important input to the ECM strategies. The ABS derives the speed signal from the ABS wheel speed sensors. The frequency of this signal changes according to road speed. The ECM uses this signal to determine the following:

Ignition is controlled by a direct ignition system, provided by 4 plug top coils. The ECM is able to detect and correct for ignition knock on each cylinder and adjust the ignition timing for each cylinder to achieve optimum performance.

The ECM controls operation of the starter motor via the starter relay in the BJB. The ECM also protects the starter motor, preventing operation of the starter relay if the engine speed signal exceeds a predetermined value The ECM and the CJB exchange encrypted data to validate and approve an engine start.

Refer to: Anti-Theft - Passive (419-01B Anti-Theft - Passive, Description and Operation).

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