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

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

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:

• BJB (battery junction box)
• Generator
• CJB (central junction box)
• ECT (engine coolant temperature) sensor 1
• ECT sensor 2 (NAS only)
• Immobilizer Antenna Unit (IAU)
• TCM (transmission control module)
• APP (accelerator pedal position) sensor
• Ambient temperature sensor
• LP fuel sensor
• Oil pressure sensor
• CMP (camshaft position) sensor (inlet)
• CMP sensor (exhaust)
• CKP (crankshaft position) sensor
• A/C (air conditioning) pressure sensor
• Front HO2S (heated oxygen sensor)
• Rear HO2S
• Oil temperature sensor
• Fuel rail pressure sensor
• Turbocharger boost pressure and temperature sensor
• MAP (manifold absolute pressure) sensor
• MAF (mass air flow)
• Knock sensors (2 off)
• Stop lamp diagnostic switch
• Stop lamp switch
• RCM (restraints control module)
• A/C compressor clutch
• Electric throttle position sensors.

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

• FPDM (fuel pump driver module)
• Cooling fan control module
• Fuel injectors
• Fuel pump metering valve
• Turbocharger wastegate control solenoid
• VCT (variable camshaft timing) solenoid (inlet)
• VCT solenoid (exhaust)
• Purge valve
• Ignition coils (4 off)
• Electric throttle motor
• DMTL pump (NAS only).

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:

• How much to reduce engine torque during gear changes
• When to permit speed control operation
• To control the operation of the speed control system
• Implementation of the dle strategy when the vehicle is stationary.

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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