Fuel Injection System Component Location Overview

Engine Compartment 

Fig 1: Fuel Injection System Component Location

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1. Engine Control Module -J623-
   • Component location, refer to Fig 4
   • Removing and installing, refer to Engine Control Module -J623- .
2. Mass Airflow Sensor -G70-
   • Removing and installing, refer to Mass Airflow Sensor -G70- 
3. Exhaust Gas Recirculation Temperature Sensor -G98- Connector
   • Removing and installing, refer to EGR Temperature Sensor -G98-, REMOVING AND INSTALLING .
   • Component location, refer to Fig 9
4. Connector
   • For Manifold Absolute Pressure Controlled Engine Cooling Thermostat -F265-, Fuel Metering Valve -N290- and EGR Motor -V338-
   • Component location, refer to Fig 9
5. Restrictor
   • In the fuel return line
6. Plenum Chamber Bulkhead Bracket
   • For the Heated Oxygen Sensor -G39- electrical connector
   • For the Exhaust gas temperature sensor 3 -G495- electrical connector
   • For the Differential Pressure Sensor -G505-
   • Electrical connector for the Exhaust Gas Temperature Sensor 4 -G648-
   • Component location, refer to Fig 8
7. Fuel Temperature Sensor -G81-
8. Turbocharger Control Module 1 -J724-
   • On the left turbocharger
   • Removing and installing, refer to Turbocharger Control Module 1 -J724-, REMOVING AND INSTALLING
9. Cylinder Head Coolant Valve -N489-
10. Oxygen Sensor -G39- with Oxygen Sensor Heater -Z19-
    • Assembly overview, refer to HEATED OXYGEN SENSOR OVERVIEW .
    • Removing and installing, refer to Heated Oxygen Sensor -G39- WITH Oxygen Sensor Heater -Z19- 
11. Exhaust Gas Recirculation Motor -V338-
    • Removing and installing, Refer to EGR Motor -V338-, REMOVING AND INSTALLING .
12. Engine Coolant Temperature Sensor -G62-
13. Fuel Pressure Sensor -G247-
    • Removing and installing, refer to Fuel Pressure Sensor -G247- 
    • Tightening specification, refer to Figure
14. Fuel Filter
15. Charge Air Pressure Sensor -G31- /Intake Air Temperature Sensor -G42-
    • Component location, refer to Fig 14
    • Removing and installing, refer to Charge Air Pressure Sensor -G31- / Intake Air Temperature Sensor -G42-, REMOVING AND INSTALLING .
    • 5 Nm
16. Throttle Valve Control Module -J338-
    • Assembly overview, refer to INTAKE MANIFOLD OVERVIEW 
17. Injector
    • Cylinder Bank 2
    • Removing and installing, refer to FUEL INJECTORS .
18. Oil Pressure Regulation Valve -N428-
    • Component location, refer to Fig 16
    • Removing and installing, refer to Oil Pressure Regulation Valve -N428-, REMOVING AND INSTALLING
19. Engine Temperature Control Sensor -G694-
    • Component location, refer to Fig 15
20. Intake Flap Motor -V157-
    • Assembly overview, refer to INTAKE MANIFOLD OVERVIEW .
21. Exhaust Gas Recirculation Cooler Switch-Over Valve -N345-
22. Reduced Oil Pressure Switch -F378-
    • Removing and installing, refer to Oil Pressure Switch -F22- /Reduced Oil Pressure Switch -F378-, REMOVING AND INSTALLING .
23. Oil Pressure Switch -F22-
    • Removing and installing, refer to Oil Pressure Switch -F22- /Reduced Oil Pressure Switch -F378-, REMOVING AND INSTALLING
24. Fuel Pressure Regulator Valve -N276-
    • Assembly overview, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW 
    • Perform an adaptation after replacing the high pressure pump and / or the fuel pressure regulator valve --. Use a vehicle diagnosis tester
    • Removing and installing, refer to Fuel Pressure Regulator Valve -N276- 
25. Engine Coolant Temperature Sensor on Radiator Outlet -G83-
    • Component location, refer to Fig 7
    • Removing and installing, refer to Engine Coolant Temperature Sensor on Radiator Outlet -G83-, REMOVING AND INSTALLING
26. Injector
    • Cylinder Bank 1
    • Removing and installing, refer to FUEL INJECTORS 

Engine from the Top 

Fig 2: Fuel Injection System Component Location

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1. Fuel Pressure Regulator Valve -N276-
   • Perform an adaptation after replacing the high pressure pump and / or the Fuel pressure regulator valve -N276-. Use a Vehicle Diagnostic Tester to do this.
   • Assembly overview, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW 
2. Cylinder 1 Fuel Injector -N30-
   • Assembly overview, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW .
3. Glow Plug 1 -Q10-
   • Assembly overview, refer to GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW
4. Cylinder 2 Fuel Injector -N31-
   • Assembly overview, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW 
5. Camshaft Position Sensor -G40-
   • Component location, refer to Fig 12
   • Assembly overview, refer to GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW
6. Glow Plug 2 -Q11-
   • Assembly overview, refer to GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW .
7. Cylinder 3 Fuel Injector -N32-
   • Assembly overview, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW 
8. Glow Plug 3 -Q12-
   • Assembly overview, refer to GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW
9. Fuel Temperature Sensor -G81-
10. Turbocharger Control Module 1 -J724-
    • On the left turbocharger
    • Removing and installing, refer to Turbocharger Control Module 1 -J724-, REMOVING AND INSTALLING
11. Fuel Metering Valve -N290-
    • Component location, refer to Fig 2
12. Exhaust Gas Recirculation Motor -V338-
    • Removing and installing, refer to EGR Motor -V338-, REMOVING AND INSTALLING .
13. Fuel Pressure Sensor -G247-
    • Removing and installing, refer to Fuel Pressure Sensor -G247- 
    • Tightening specification, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW 
14. Glow Plug 6 -Q15-
    • Assembly overview, refer to GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW
15. Cylinder 6 Fuel Injector -N84-
    • Assembly overview, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW .
16. Glow Plug 5 -Q14-
    • Assembly overview, refer to GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW .
17. Cylinder 5 Fuel Injector -N83-
    • Assembly overview, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW .
18. Glow Plug 4 -Q13-
    • Assembly overview, refer to GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW .
19. Cylinder 4 Fuel Injector -N33-
    • Assembly overview, refer to FUEL RAIL, HIGH PRESSURE LINES, FUEL INJECTORS OVERVIEW 
20. Engine Coolant Temperature Sensor -G62-
21. EGR Temperature Sensor -G98-
    • Removing and installing, refer to EGR Temperature Sensor -G98-, REMOVING AND INSTALLING .
    • Component location Fig 10
22. Cylinder Head Coolant Valve -N489-

Engine from the Front 

Fig 3: Fuel Injection System Component Parts Location

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1. Oil Level Thermal Sensor -G266-
   • Removing and installing, refer to Oil Level Thermal Sensor -G266-, REMOVING AND INSTALLING
2. Manifold Absolute Pressure Controlled Engine Cooling Thermostat -F265-
   • Removing and installing, refer to Map Controlled Engine Cooling Thermostat -F265-, REMOVING AND INSTALLING
3. Oil Temperature Sensor 2 -G664-
   • Component location, refer to Fig 17
   • Removing and installing, refer to Oil Temperature Sensor 2 -G664-, REMOVING AND INSTALLING
4. Oil Pressure Switch -F22-
   • Removing and installing, refer to Oil Pressure Switch -F22- /Reduced Oil Pressure Switch -F378-, REMOVING AND INSTALLING
5. Reduced Oil Pressure Switch -F378-
   • Removing and installing, refer to Oil Pressure Switch -F22- /Reduced Oil Pressure Switch -F378-, REMOVING AND INSTALLING
6. Exhaust Gas Recirculation Cooler Switch-Over Valve -N345-
7. Intake Flap Motor -V157-
   • Assembly overview, refer to INTAKE MANIFOLD OVERVIEW 
8. Throttle Valve Control Module -J338-
   • Assembly overview, refer to INTAKE MANIFOLD OVERVIEW 
9. Engine Temperature Control Temperature Sensor -G694-
   • Component location, refer to Fig 15
10. Oil Pressure Regulation Valve -N428-
    • Component location, refer to Fig 16
    • Removing and installing, Refer to Oil Pressure Regulation Valve -N428-, REMOVING AND INSTALLING .
11. A - Throttle Position Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185-
    • Component location, refer to Fig 6
    • Removing and installing, refer to ACCELERATOR PEDAL MODULE WITH THROTTLE POSITION SENSORS, REMOVING AND INSTALLING
12. B - Engine Speed Sensor -G28-
    • Component location, refer to Fig 11
    • Assembly overview, refer to GLOW PLUG, CAMSHAFT POSITION SENSOR, ENGINE SPEED SENSOR OVERVIEW
    • Removing and installing, refer to Engine Speed Sensor -G28-
13. C - Fuel Pump Control Module -J538-
    • Component location, refer to Fig 5
14. E - Exhaust Gas Temperature Sensor 1 -G235-
    • Removing and installing, refer to Exhaust Gas Temperature Sensor 1 -G235-, REMOVING AND INSTALLING
15. F - Exhaust Gas Temperature Sensor 2 -G448-
    • Component location, refer to Fig 18
    • Removing and installing, refer to Exhaust Gas Temperature Sensor 2 -G448-, REMOVING AND INSTALLING .
16. D - Exhaust Gas Temperature Sensor 3 -G495-
    • Assembly overview, refer to HEATED OXYGEN SENSOR OVERVIEW .
    • Removing and installing, Refer to Exhaust Gas Temperature Sensor 3 -G495-, REMOVING AND INSTALLING
17. G - Exhaust Gas Temperature Sensor 4 -G648-
    • (Not for North American region)
18. H - Particulate Sensor -G784-
    • Component location, refer to Fig 20
    • Removing and installing, Refer to Particulate Sensor -G784-, REMOVING AND INSTALLING
19. F - Reducing Agent Injector -N474-
    • Component location, refer to Fig 24
    • Removing and installing, refer to Reducing Agent Injector -N474-, REMOVING AND INSTALLING
20. H - NOx Sensor Control Module -J583- with NOx Sensor -G295-
    • Component location, refer to Fig 21
    • Removing and installing, refer to NOx Sensor Control Module -J583- WITH NOx Sensor -G295- 
21. I - NOx Sensor 2 -G687-
    • Component location, refer to Fig 23
    • Electrical harness connector, refer to Fig 22
    • Removing and installing, refer to NOx Sensor Control Module 2 -J881- WITH NOx Sensor 2 -G687- 
22. J - Reducing Agent Tank Cap Switch -F502-
    • Component location, refer to Fig 25

Fig 4: Identifying Engine Control Module (ECM) -J623- -1- And GND Wire Nut -2-

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Fig 5: Fuel Pump (FP) Control Module -J538- for vehicles from 11.2006 - Tightening Specifications

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The Fuel Pump Control Module -J538- is located on the right side under the rear seat bench, directly under the floor covering.

Removing and installing, refer to Fuel Pump Control Module -J538-, REMOVING AND INSTALLING .

Fig 6: Disconnect Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185- 6-Pin Electrical Harness Connector -3-

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Fig 7: Engine Coolant Temperature (ECT) Sensor On Radiator Outlet -G83- -2-

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Fig 8: Plenum Chamber Bulkhead Bracket

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1 - Exhaust Gas Temperature Sensor 3 -G495- connector

2 - Connector for Heated Oxygen Sensor -G39-

3 - Electrical connector for the Exhaust Gas Temperature Sensor 4 -G648- (Not for North American region)

4 - Differential Pressure Sensor -G505-

5 - Heated Oxygen Sensor -G39-

Fig 9: Connectors

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1. For EGR Temperature Sensor -G98-
2. For Map Controlled Engine Cooling Thermostat -F265-, Fuel Metering Valve -N290- and EGR Motor -V338-
3. Restrictor in the fuel return line

Fig 10: Locating Connector

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1. EGR Temperature Sensor -G98- connector

Fig 11: Engine Speed Sensor -G28-

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Fig 12: Camshaft Position Sensor -G40- Location

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• Item -2- on cylinder head cover on the right cylinder bank 1.

Fig 13: -2- In The High Pressure Pump, And Clamps

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• Item -2- in the high pressure pump.

Fig 14: Component Location Charge Air Pressure Sensor -G31- /Intake Air Temperature Sensor -G42-

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• Item -1- on left air guide pipe in engine compartment.

Fig 15: Component Location Engine Temperature Control Sensor -G694-

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• Item -1- on left front cylinder block.

Fig 16: Oil Pressure Regulation Valve -N428-

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Fig 17: Identifying Connector

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Fig 18: Exhaust Gas Temperature Sensor 2 -G448- -1-

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Fig 19: Identifying Exhaust Gas Temperature Sensor 4 -Arrow-

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Fig 20: Particulate Sensor -G784-

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1 - Particle Sensor -G784-

2 - Particulate Sensor -G784- connector

Fig 21: Identifying NOx Sensor -G295-

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1 - NOx sensor -G295- connector

Fig 22: Identifying Nuts -Arrows-, NOx Sensor Control Module 2, And NOx Sensor 2

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1 - For NOx sensor 2 control module -J881-

Fig 23: Identifying Retainers -Arrows- And Heat Shield

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Fig 24: Identifying Injector For Reducing Agent N474

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Fig 25: Reducing Agent Tank Cap Switch -F502- -2-

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