Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Engine Control Module (ECM) Adaptions

OPERATION

The ECM has the ability to adapt the input values it uses to control certain outputs. This capability maintains engine refinement and ensures the engine emissions remain within the legislated limits.

The components which have adaptions associated with them are:

  • Accelerator Pedal Position (APP) sensor
  • Heated Oxygen Sensor (HO2S)
  • Nitrogen oxide (NOx) sensor
  • Mass Air Flow and Temperature (MAFT) sensor
  • Crankshaft Position (CKP) sensor
  • Electric throttle.

DIAGNOSTICS

The ECM stores each fault as a DTC. The DTC and associated environmental and freeze frame data can be read using an approved diagnostic system, which can also read real time data from each sensor, the adaption values currently being employed and the current fueling, ignition and idle speed settings.

INPUT/OUTPUT DIAGRAM - SHEET 1 OF 7 - ELECTRONIC ENGINE CONTROLS

INPUT/OUTPUT DIAGRAM - SHEET 1 OF 7 - ELECTRONIC ENGINE CONTROLS

A = HARDWIRED; AL = PULSE WIDTH MODULATION (PWM); AN = HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) POWERTRAIN SYSTEMS BUS; O = LOCAL INTERCONNECT NETWORK (LIN) BUS

  1. Engine Control Module (ECM)
  2. Transmission Control Switch (TCS) (if equipped)
  3. Gateway Module (GWM)
  4. Automatic Temperature Control module (ATCM)
  5. Transmission Control Module (TCM) (if equipped)
  6. Central Junction Box (CJB)
  7. Variable Camshaft Timing (VCT) actuator
  8. Glow plug control module
  9. Starter motor solenoid
  10. Starter motor
  11. Piston cooling oil jets solenoid
  12. Oil pressure control solenoid
  13. Variable Geometry Turbocharger (VGT) vane actuator
  14. Ground
  15. Engine Control Module (ECM) relay
  16. Fuse - located in the Battery Junction Box (BJB)
  17. Heated Oxygen Sensor (HO2S)
  18. Accelerator Pedal Position (APP) sensor
  19. Brake pedal switch
  20. Charge air cooler temperature sensor
  21. Brake vacuum sensor
  22. Cylinder block temperature sensor
  23. Cylinder head temperature sensor
  24. Oil pressure and temperature sensor
  25. Manifold Absolute Pressure and Temperature (MAPT) sensor
  26. Mass Air Flow and Temperature (MAFT) sensor
  27. Ambient Air Temperature (AAT) sensor
  28. Camshaft Position (CMP) sensor
  29. Crankshaft Position (CKP) sensor

INPUT/OUTPUT DIAGRAM - SHEET 2 OF 7 - FUEL SYSTEM COMPONENTS

INPUT/OUTPUT DIAGRAM - SHEET 2 OF 7 - FUEL SYSTEM COMPONENTS

A = HARDWIRED; AL = PULSE WIDTH MODULATION (PWM).

  1. Engine Control Module (ECM)
  2. Fuel metering valve
  3. Fuel rail Pressure Control Valve (PCV)
  4. Fuel Pump Driver Module (FPDM)
  5. Fuel injector (4 off)
  6. Ground
  7. Engine Control Module (ECM) relay
  8. Fuse - located in the Battery Junction Box (BJB)
  9. Fuel temperature sensor
  10. Fuel Rail Pressure (FRP) sensor
  11. Fuel Pump Driver Module (FPDM) monitoring signal
  12. Water In Fuel (WIF) sensor

INPUT/OUTPUT DIAGRAM - SHEET 3 OF 7 - ENGINE EMISSION CONTROL SYSTEM COMPONENTS

INPUT/OUTPUT DIAGRAM - SHEET 3 OF 7 - ENGINE EMISSION CONTROL SYSTEM COMPONENTS

A = HARDWIRED; AL = PULSE WIDTH MODULATION (PWM).

  1. Engine Control Module (ECM)
  2. High Pressure (HP) Exhaust Gas Recirculation (EGR) valve motor
  3. Low Pressure (LP) Exhaust Gas Recirculation (EGR) valve motor
  4. Electric throttle actuator
  5. Ground
  6. Engine Control Module (ECM) relay
  7. Fuse - located in the Battery Junction Box (BJB)
  8. Low Pressure (LP) Exhaust Gas Recirculation (EGR) differential pressure sensor
  9. Electric throttle - Throttle Position Sensor (TPS)
  10. Manifold Absolute Pressure and Temperature (MAPT) sensor
  11. Low Pressure (LP) Exhaust Gas Recirculation (EGR) valve position sensor
  12. High Pressure (HP) Exhaust Gas Recirculation (EGR) valve position sensor

INPUT/OUTPUT DIAGRAM - SHEET 4 OF 7 - CLUTCH CONTROL COMPONENTS - VEHICLES WITH MANUAL TRANSMISSION

INPUT/OUTPUT DIAGRAM - SHEET 4 OF 7 - CLUTCH CONTROL COMPONENTS - VEHICLES WITH MANUAL TRANSMISSION

A = HARDWIRED

  1. Engine Control Module (ECM)
  2. Ground
  3. Engine Control Module (ECM) relay
  4. Fuse - located in the Battery Junction Box (BJB)
  5. 1st gear position switch
  6. Neutral gear sensor
  7. Clutch Bottom Of Travel (BOT) switch
  8. Clutch pedal position sensor

INPUT/OUTPUT DIAGRAM - SHEET 5 OF 7 - ENGINE COOLING SYSTEM COMPONENTS

INPUT/OUTPUT DIAGRAM - SHEET 5 OF 7 - ENGINE COOLING SYSTEM COMPONENTS

A = HARDWIRED; AL = PULSE WIDTH MODULATION (PWM); AN = HIGH SPEED (HS) CONTROLLER AREA NETWORK (CAN) POWERTRAIN SYSTEMS BUS.

  1. Engine Control Module (ECM)
  2. Anti-lock Brake System (ABS) control module
  3. Electric cooling fan
  4. Electric thermostat heater
  5. Solenoid - Variable coolant pump
  6. Charge air cooler coolant pump
  7. Ground
  8. Power supply
  9. Engine Coolant Temperature (ECT) sensor 1
  10. Variable coolant pump shroud position sensor
  11. Radiator outlet temperature sensor

INPUT/OUTPUT DIAGRAM - SHEET 6 OF 7 - DIESEL PARTICULATE FILTER (DPF) SYSTEM COMPONENTS

INPUT/OUTPUT DIAGRAM - SHEET 6 OF 7 - DIESEL PARTICULATE FILTER (DPF) SYSTEM COMPONENTS

A = HARDWIRED.

  1. Engine Control Module (ECM)
  2. Ground
  3. Engine Control Module (ECM) relay - located in the Battery Junction Box (BJB)
  4. Fuse - located in the Battery Junction Box (BJB)
  5. Diesel Particulate Filter (DPF) differential pressure sensor
  6. Post-Diesel Particulate Filter (DPF) exhaust gas temperature sensor
  7. Pre-Diesel Particulate Filter (DPF) exhaust gas temperature sensor
  8. Pre-catalytic converter exhaust gas temperature sensor

INPUT/OUTPUT DIAGRAM - SHEET 7 OF 7 - SELECTIVE CATALYST REDUCTION (SCR) SYSTEM COMPONENTS - EU6 MARKET VEHICLES

INPUT/OUTPUT DIAGRAM - SHEET 7 OF 7 - SELECTIVE CATALYST REDUCTION (SCR) SYSTEM COMPONENTS - EU6 MARKET VEHICLES

A = HARDWIRED; AL = PULSE WIDTH MODULATION (PWM); U = PRIVATE CONTROLLER AREA NETWORK (CAN) BUS.

  1. Engine Control Module (ECM)
  2. Post-Selective Catalyst Reduction (SCR) nitrogen oxide (NOx) sensor control module
  3. Diesel Exhaust Fluid (DEF) heater control unit
  4. Diesel Exhaust Fluid (DEF) tank module heater element
  5. Diesel Exhaust Fluid (DEF) line heater
  6. Diesel Exhaust Fluid (DEF) injection pump
  7. Diesel Exhaust Fluid (DEF) injector
  8. Ground
  9. Power supply
  10. Diesel Exhaust Fluid (DEF) level sensor
  11. Post Selective Catalyst Reduction (SCR) NOx sensor

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