4.2L Gasoline, BAR Overview

Engine Management System

4.2L gasoline, BAR Overview


4.2L FSI BAR Right Side of the Engine Compartment (Component
A - B are not shown in the overview)





A - Oil Pressure Switch -F1- => [ Oil Pressure Switch ] See Image Below.

B - Oil Level Thermal Sensor -G266- => [ Oil Level Thermal Sensor ] See Image Below.
• Located at the bottom of the lower oil pan

1 - Secondary Air Injection (AIR) Pump Motor -V101- => [ 4.2L FSI BAR Exhaust System ] Locations
• Located front right below headlamp

2 - Brake System Vacuum Pump -V192-
• Located front right of the engine compartment

3 - Ignition Coils, Cylinder Bank 1 => [ Ignition Coils Cylinder Bank 1 ] See Image Below.
• Located outside on right cylinder head
• Ignition Coil 1 with Power Output Stage -N70-

• Ignition Coil 2 with Power Output Stage -N127-

• Ignition Coil 3 with Power Output Stage -N291-

• Ignition Coil 4 with Power Output Stage -N292-


4 - Camshaft Position (CMP) Sensor 3 -G300- => [ Ignition Coils Cylinder Bank 1 ] See Image Below.
• Located outside on right cylinder head

5 - Oxygen Sensor Electrical Connectors => [ Oxygen Sensor Electrical Connectors ] See Image Below.
• Located at the right strut tower

6 - Intake Air Temperature (IAT) Sensor -G42- /Mass Air Flow (MAF) Sensor -G70- => [ Air Filter Assembly Overview ] See Image Below.

7 - Engine Control Module (ECM) -J623- => [ Engine Control Module (ECM) ] See Image Below.
• Located in E-box plenum chamber

8 - Camshaft Adjustment Valve 1 (exhaust) -N318- => [ Ignition Coils Cylinder Bank 1 ] See Image Below.
• Located outside on right cylinder head

9 - Fuel Metering Valve -N290- => [ Fuel Metering Valve ] See Image Below.
• For installation location beginning with MY 2009 => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.
• Located in the high pressure pump

10 - Heated Oxygen Sensor (HO2S) -G39- => [ Exhaust System and Secondary Air Injection Overviews ] Locations

11 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter -G130- => [ Exhaust System and Secondary Air Injection Overviews ] Locations

12 - Engine Coolant Temperature (ECT) Sensor -G62- => [ Engine Coolant Temperature (ECT) Sensor ] See Image Below.
• Located right on the rear coolant pipe

13 - Electrical Harness Connector => [ Electrical Harness Connector ] See Image Below.
• For Engine Speed (RPM) Sensor -G28-
• Located right rear of engine below starter

14 - Camshaft Adjustment Valve 1 -N205- => [ Right Cylinder Head ] See Image Below.
• For installation location beginning with MY 2009 => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.
• Located inside on right cylinder head






4.2L FSI BAR Right Side of the Engine Compartment continued





15 - Evaporative Emission (EVAP) Canister Purge Regulator Valve 1 -N80- => [ Evaporative Emission (EVAP) Canister Purge Regulator Valve 1 ] See Image Below.

16 - Camshaft Position (CMP) Sensor -G40- => [ Right Cylinder Head ] See Image Below.
• Located inside on right cylinder head
• For installation location beginning with MY 2009 => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.

17 - Knock Sensor 2 -G66- => [ Right Cylinder Head ] See Image Below.
• Located inside on right cylinder head
• For installation location beginning with MY 2009 => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.

18 - Fuel Injectors Cylinder Bank 1 => [ Right Cylinder Head ] See Image Below.
• Located inside on right cylinder head
• For installation location beginning with MY 2009 => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.
• Cylinder 1 Fuel Injector -N30-

• Cylinder 2 Fuel Injector -N31-

• Cylinder 3 Fuel Injector -N32-

• Cylinder 4 Fuel Injector -N33-


19 - Variable Intake Manifold Runner Motor -V183- => [ Magnesium Intake Manifold ] See Image Below.
• From MY 2009 the Variable Intake Manifold Runner Motor -V183- has become the Intake Manifold Tuning (IMT) Valve -N156- => [ Magnesium Intake Manifold ] See Image Below.
• Located front of the Intake Manifold

20 - Fuel Pressure Sensor -G247- => [ Right Cylinder Head ] See Image Below.
• Located inside on right cylinder head
• For installation location beginning with MY 2009 => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.

21 - Secondary Air Injection (AIR) Solenoid Valve 2 -N320- or Secondary Air Injection (AIR) Solenoid Valve -N112- => [ 4.2L FSI BAR Exhaust System ] Locations

22 - Intake Manifold Runner Position Sensor -G336- => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.

23 - Electrical Connectors
• Black for Knock Sensor (KS) 1 -G61-
• Brown for Knock Sensor (KS) 2 -G66-

24 - Knock Sensor 1 -G61- => [ Right Cylinder Head ] See Image Below.
• Located inside on right cylinder head
• For installation location beginning with MY 2009 => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.






4.2L FSI BAR Left Side of Engine Compartment (Component
A is not shown in the overview)





A - Leak Detection Pump (LDP) -V144- => [ EVAP System, Assembly Overview ] See Image Below.

1 - Throttle Valve Control Module -J338- => [ Magnesium Intake Manifold ] See Image Below.
• Located rear of the intake manifold
Throttle valve control module -J338- is integrated with the following:
• Throttle Drive (for Electronic Power Control (EPC)) -G186-

• Throttle Drive Angle Sensor 1 (for Electronic Power Control (EPC) -G187-

• Throttle Drive Angle Sensor 2 (for Electronic Power Control (EPC) -G188-

For the 3.6L location refer to 3.6L Gasoline, BHK Overview
For the 3.0L TDI CATA refer to 3.0L TDI CATA Overview

2 - Low Fuel Pressure Sensor -G410- => [ Fuel Pipes and Fuel Rail Assembly Overview ] See Image Below.

3 - Engine Speed (RPM) Sensor -G28- => [ Engine Speed (RPM) Sensor ] See Image Below.
• Installed from below in transmission bell housing

4 - Knock Sensor 4 -G199- => [ Left Cylinder Head ] See Image Below.
• For installation location beginning with MY 2009 => [ Left Cylinder Head (beginning with MY 2009) ] See Image Below.

5 - Camshaft Adjustment Valve 2 -N208- => [ Left Cylinder Head ] See Image Below.
• For installation location beginning with MY 2009 => [ Left Cylinder Head (beginning with MY 2009) ] See Image Below.

6 - Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter -G131- => [ Exhaust System and Secondary Air Injection Overviews ] Locations

7 - Fuel Metering Valve 2 -N402- => [ Fuel Metering Valve 2 ] See Image Below.
• Located left of high pressure pump
• For installation location beginning with MY 2009 => [ Left Cylinder Head (beginning with MY 2009) ] See Image Below.

9 - Brake Booster Pressure Sensor -G294-
• Located left in the plenum chamber

10 - Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185- => [ Accelerator Pedal Module Assembly Overview ] Locations
• Located in the accelerator pedal module

11 - Brake Light Switch -F- /Brake Pedal Switch -F47-
• Located at the brake pedal






4.2L FSI BAR Left Side of Engine Compartment continued





13 - Heated Oxygen Sensor (HO2S) 2 -G108- => [ Exhaust System and Secondary Air Injection Overviews ] Locations

14 - Coolant Pump -V50- => [ Cooling Fans and Cooling Pump ] Locations
• Located behind the left front wheel housing liner

15 - Camshaft Adjustment Valve 2 (exhaust) -N319- => [ Outside on Left Cylinder Head ] See Image Below.

16 - Mass Air Flow (MAF) Sensor 2 -G246- => [ Air Filter Assembly Overview ] See Image Below.

17 - Camshaft Position (CMP) Sensor 4 -G301- => [ Outside on Left Cylinder Head ] See Image Below.

18 - Engine Coolant Temperature (ECT) Sensor (on Radiator) -G83- => [ Cooling Fans and Cooling Pump ] Locations
• Located in left coolant connection at the top of radiator

19 - Ignition Coils Cylinder Bank 2 => [ Outside on Left Cylinder Head ] See Image Below.
• Ignition Coil 5 with Power Output Stage -N323-

• Ignition Coil 6 with Power Output Stage -N324-

• Ignition Coil 7 with Power Output Stage -N325-

• Ignition Coil 8 with Power Output Stage -N326-


20 - Electrical Connectors
• Black for Knock Sensor 3 -G198-
• Brown for Knock Sensor (KS) 4 -G199-

21 - Map Controlled Engine Cooling Thermostat -F265- => [ Map Controlled Engine Cooling Thermostat ] See Image Below.
• Located front left of engine

22 - Camshaft Position (CMP) Sensor 2 -G163- => [ Left Cylinder Head ] See Image Below.

23 - Intake Manifold Runner Position Sensor 2 -G512- => [ Magnesium Intake Manifold ] See Image Below.

24 - Knock Sensor 3 -G198- => [ Left Cylinder Head ] See Image Below.

25 - Intake Flap Motor -V157- => [ Magnesium Intake Manifold ] See Image Below.
• Beginning with MY 2009, the Variable Intake Manifold Runner Motor -V157- has become the Intake Manifold Runner Control Valve -N316-

26 - Fuel injectors Cylinder bank 2 => [ Left Cylinder Head ] See Image Below.
• Cylinder 5 Fuel Injector -N83-

• Cylinder 6 Fuel Injector -N84-

• Cylinder 7 Fuel Injector -N85-

• Cylinder 8 Fuel Injector -N86-








Oil Pressure Switch






1 - Oil Pressure Switch -F1-
2 - Electrical Connector






Oil Level Thermal Sensor






- - Oil Level Thermal Sensor -G266-






Ignition Coils Cylinder Bank
1






1 - Camshaft Position (CMP) Sensor 3 -G300-
2 - Camshaft Adjustment Valve 1 (exhaust) -N318-
3 - Ignition Coil 4 with Power Output Stage -N292-
4 - Ignition Coil 3 with Power Output Stage -N291-
5 - Ignition Coil 2 with Power Output Stage -N127-
6 - Ignition Coil 1 with Power Output Stage -N70-






Oxygen Sensor Electrical Connectors






1 - To Heated Oxygen Sensor (HO2S) -G39
2 - To Oxygen Sensor (O2S) Behind Three Way Catalytic Converter -G130-
3 - To Heated Oxygen Sensor (HO2S) 2 -G108-
4 - To Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter -G131-
For the 4.2L FSI BAR Exhaust System location => [ 4.2L FSI BAR Exhaust System ] Locations






Air Filter Assembly Overview






7 - Mass Air Flow (MAF) Sensor
• Left - Mass Air Flow (MAF) Sensor 2 -G246-

• Right - Mass Air Flow (MAF) Sensor -G70- with Intake Air Temperature (IAT) Sensor -G42-







EVAP System, Assembly Overview






6 - Leak Detection Pump (LDP) -V144-
- Located under the wheel housing liner in right rear wheel
8 - EVAP canister
- Located under the wheel housing liner in right rear wheel






Engine Control Module (ECM)






1 - Engine Control Module (ECM) -J623-






Fuel Metering Valve






Arrow - Fuel Metering Valve -N290-






Engine Coolant Temperature
(ECT) Sensor






Arrow - Engine Coolant Temperature (ECT) Sensor -G62-






Electrical Harness Connector






Arrow - Electrical harness connector for the Engine Speed (RPM) Sensor -G28-






Right Cylinder Head






1 - Fuel Pressure Sensor -G247-
2 - Knock Sensor 1 -G61-
3 - Camshaft Position (CMP) Sensor -G40-
4 - Cylinder 1 Fuel Injector -N30-
5 - Cylinder 2 Fuel Injector -N31-
6 - Cylinder 3 Fuel Injector -N32-
7 - Cylinder 4 Fuel Injector -N33-
8 - Camshaft Adjustment Valve 1 -N205-
9 - Knock Sensor 2 -G66-
- Installation locations right cylinder head (beginning with MY 2009) => [ Right Cylinder Head (beginning with MY 2009) ] See Image Below.






Right Cylinder Head (beginning
with MY 2009)






1 - Intake Manifold Runner Position Sensor -G336- => [ Magnesium Intake Manifold ] See Image Below.
2 - Camshaft Position (CMP) Sensor -G40-
3 - Fuel Metering Valve -N290-
4 - Camshaft Adjustment Valve 1 -N205-
5 - Low Fuel Pressure Sensor -G410-
6 - Cylinder 1 Fuel Injector -N30-
7 - Cylinder 2 Fuel Injector -N31-
8 - Cylinder 3 Fuel Injector -N32-
9 - Cylinder 4 Fuel Injector -N33-
10 - Fuel Pressure Sensor -G247-
11 - Intake Manifold Runner Control (IMRC) Valve -N316-
12 - Knock Sensor 1 -G61-
13 - Knock Sensor 2 -G66-






Evaporative Emission (EVAP)
Canister Purge Regulator Valve 1






1 - Evaporative Emission (EVAP) Canister Purge Regulator Valve 1 -N80-
2 - Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical connector






Magnesium Intake Manifold






1 - Intake Flap Motor -V157-
- Beginning with MY 2009, the Variable Intake Manifold Runner Motor -V157- has become the Intake Manifold Runner Control Valve -N316-
4 - Variable Intake Manifold Runner Motor -V183-
- Beginning with MY 2009, the Variable Intake Manifold Runner Motor -V183- has become the Intake Manifold Tuning Valve -N156-
6 - Intake Manifold Runner Position Sensor -G336-
8 - Intake Manifold
19 - Throttle Valve Control Module -J338-
25 - Intake Manifold Runner Position Sensor 2 -G512-






Plastic Intake Manifold from
MY 2009






1 - Intake Manifold Runner Position Sensor -G336-
4 - Intake Flap Vacuum Diaphragm (Cylinder Bank 1)
5 - Intake Manifold Lower Section
7 - Crankcase Housing Ventilation Pressure Regulator Valve
9 - Throttle Valve Control Module -J338-
14 - Intake Manifold Lower Section
16 - Intake Manifold Runner Position Sensor 2 -G512-
18 - Intake Flap Vacuum Diaphragm (Cylinder Bank 2)
19 - Intake Manifold Runner Control (IMRC) Valve -N316- /Intake Manifold Runner Control (IMRC) Valve 2 -N403-






Fuel Pipes and Fuel Rail Assembly
Overview






2 - Low Fuel Pressure Sensor -G410-
8 - Intake Manifold Lower Section
12 - Fuel Rail With Intake Manifold Flaps






Engine Speed (RPM) Sensor






Arrow - Engine Speed (RPM) Sensor -G28-






Left Cylinder Head






1 - Knock Sensor 4 -G199-
2 - Camshaft Adjustment Valve 2 -N208-
3 - Camshaft Position (CMP) Sensor 2 -G163-
4 - Cylinder 8 Fuel Injector -N86-
5 - Cylinder 7 Fuel Injector -N85-
6 - Cylinder 6 Fuel Injector -N84-
7 - Cylinder 5 Fuel Injector -N83-
8 - Knock Sensor 3 -G198-
- Installation locations left cylinder head (beginning with MY 2009) => [ Left Cylinder Head (beginning with MY 2009) ] See Image Below.






Left Cylinder Head (beginning
with MY 2009)






1 - Camshaft Adjustment Valve 2 -N208-
2 - Fuel Metering Valve 2 -N402-
3 - Camshaft Position (CMP) Sensor 2 -G163-
4 - Intake Manifold Runner Position Sensor 2 -G512-
5 - Cylinder 5 Fuel Injector -N83-
6 - Cylinder 6 Fuel Injector -N84-
7 - Cylinder 7 Fuel Injector -N85-
8 - Cylinder 8 Fuel Injector -N86-
9 - Low Fuel Pressure Sensor -G410-
10 - Knock Sensor 4 -G199-
11 - Knock Sensor 3 -G198-






Fuel Metering Valve 2






- - Fuel Metering Valve 2 -N402-






Outside on Left Cylinder Head






1 - Ignition Coil 5 with Power Output Stage -N323-
2 - Ignition Coil 6 with Power Output Stage -N324-
3 - Ignition Coil 7 with Power Output Stage -N325-
4 - Ignition Coil 8 with Power Output Stage -N326-
5 - Camshaft Adjustment Valve 2 (exhaust) -N319-
6 - Camshaft Position (CMP) Sensor 4 -G301-






Map Controlled Engine Cooling
Thermostat






2 - Map Controlled Engine Cooling Thermostat -F265-






Battery Monitoring Control Module






1 - Battery Monitoring Control Module -J367-
- Location same for all systems
2 - Electrical connector