Fuel Delivery and Air Induction: Locations

Injection system, servicing
Component locations overview

Engines: AVH, AZG
The components A, B and C are not shown on the illustration.

A. Brake pedal switch -F47- or Brake light switch -F
^ Together in one housing in footwell
B. Throttle Position (TP) sensor -G79- and Sender -2- for accelerator pedal position -G185
^ In footwell at accelerator pedal
C. Clutch vacuum vent valve switch -F36
^ In footwell

1. Evaporative Emissions (EVAP) canister purge regulator valve -N80
2. Camshaft Position (CMP) sensor -G40
^ In cylinder head cover
^ Controlled by engine control module
3. Intake manifold
4. Throttle valve control module -J338
5. Positive Crankcase Ventilation (PCV) heating element -N79
6. Secondary Air Injection (AIR) Solenoid Valve -N112
7. 81-pin connector
8. Motronic Engine Control Module (ECM) -J220
9. 40-pin connector
^ Only disconnect or connect with ignition switched off
10. Mass Air Flow (MAP) sensor -G70- with Intake Air Temperature (IAT) sensor -G42
^ Gold plated contacts
11. Protective housing for relays
12. Engine Coolant Temperature (ECT) sensor -G62
13. Air cleaner
14. Protective housing
15. Ignition coils with final output stages -N70-, -N 127-, -N291-, -N292
16. Engine speed (RPM) sensor -G28
17. Secondary Air Injection (AIR) pump motor -V1 01 -
18. Injector (-N30-, -N31-, -N32-, -N33-)
19. Knock Sensor (KS) 2 -G66
20. Knock Sensor (KS) 1 -G61
21. 4-pin connector
22. Oxygen Sensor (OS2) Behind Three Way
23. 6-pin connector
^ Black for Heated Oxygen Sensor (HO2S) -G39- and Oxygen Sensor (OS2) Heater -Z19
^ Gold plated contacts
^ Installed location: On right on underside of vehicle, Refer to Fig 2
24. Heated Oxygen Sensor (HO2S) -G39-, 50 Nm
25. Fuel pressure regulator

Fig. 1 Position of relays in protective housing (on left in engine compartment)

1. Secondary Air Injection (AIR) pump relay -J299-, Distinguishing features: Control number 100
2. Motronic Engine Control Module (ECM) power supply relay -J271-, Distinguishing features: Control number 428

Note:
^ The relay locations may differ depending on level of equipment.
^ For latest control numbers and installed locations:
^ Electrical Wiring Diagrams, Troubleshooting & Component Locations
^ Disconnect battery Ground strap first if tools are required to pull relays or control modules out of the relay plate.
^ Before disconnecting the battery Ground strap obtain code for radios with anti-theft coding.

Fig. 2 Location: 6-pin connector -1- for Heated Oxygen Sensor (HO2S) before catalytic converter.

Fig. 3 Location: 4-pin connector -1- for Heated Oxygen Sensor (HO2S) before catalytic converter.

Engines: BBW, BEV
The components A, B C and D are not shown on the illustration.
A. Brake pedal switch -F47- or Brake light switch -F
^ Together in one housing in footwell
B. Throttle Position (TP) sensor -G79- and Sender -2- for accelerator pedal position -G185
^ In footwell at accelerator pedal
C. Clutch vacuum vent valve switch -F36
^ In footwell
D. Fuel pressure regulator
1. Valve -1- for camshaft adjustment -N205
2. Secondary Air Injection (AIR) Solenoid Valve -N112
3. Camshaft Position (CMP) sensor -G40
4. 81-pin connector
5. Motronic Engine Control Module (ECM) -J220
6. 40-pin connector
^ Only disconnect or connect with ignition switched off
7. Engine Coolant Temperature (ECT) sensor -G62
^ For engine control module
^ Gold plated contacts
^ Release pressure in coolant system if necessary before removing components
8. Evaporative Emissions (EVAP) canister purge regulator valve -N80
9. Intake manifold
10. Throttle valve control module -J338
^ When replacing, adapt (match) engine control module to throttle valve control module, Refer to adapting components
^ 6-pin connector
^ Gold plated contacts
11. Positive Crankcase Ventilation (PCV) heating element -N79
12. Mass Air Flow (MAF) sensor -G70- with Intake Air Temperature (IAT) sensor -G42
13. Protective housing for relays
14. Air cleaner
15. Main fuses
16. Oxygen Sensor (OS2) Behind Three Way Catalytic
17. 4-pin connector
18. Oxygen Sensor (OS2) in Center Three Way Catalytic
19. 4-pin connector
20. Sensor -1- for exhaust temperature -G235 45 Nm
21. Heated Oxygen Sensor (HO2S) -G39-, 50 Nm
22. 6-pin connector
23. 2-pin connector
25. Knock Sensor (KS) 2 -G66
26. Injectors -N30-, -N31-, -N32-, -N33
27. Secondary Air Injection (AIR) pump motor
28. Engine speed (RPM) sensor -G28
29. Ignition coils with final output stages - N70-,-N127-,-N129, -N292-

Fig. 2 Connectors, installed location

1. Protective housing, on vehicle underside right side
2. For Sensor -1- for exhaust temperature -G235
3. For Heated Oxygen Sensor (HO2S) -G39
4. For Oxygen Sensor (OS2) in Center Three Way Catalytic Converter (TWC) bank 1.
5. For Oxygen Sensor (OS2) Behind Three Way Catalytic Converter -G130