Component Locations Overview
Component Locations Overview
1 - Leak Detection Pump (LDP) -V144-
- Under wheelhousing liner at front right
2 - Heated Oxygen Sensor (HO2S)-G39- with Oxygen Sensor (O2S) Heater -Z19-
- Constantly operating oxygen sensor
- Installation location of oxygen sensors and connector cover, Fig.3
- Color coding of oxygen sensor connectors, Fig.24
- Checking oxygen sensor and oxygen sensor control before catalytic converter
- Testing oxygen sensor ageing on oxygen sensor (before catalytic converter)
- Checking oxygen sensor heating before catalytic converter
2 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- with Oxygen Sensor (O2S) Heater 1 -Z29-
- Installation location of oxygen sensors and connector cover, Fig.3
- Color coding of oxygen sensor connectors, Fig.4
- Checking oxygen sensor and oxygen sensor control after catalytic converter
- Testing oxygen sensor heating for oxygen sensor (after catalytic converter)
3 - Camshaft Position (CMP) sensor -G40-
4 - Injectors
- Cylinder 1 Fuel Injector -N30-
- Cylinder 2 Fuel Injector -N31-
- Cylinder 3 Fuel Injector -N32-
- Cylinder 4 Fuel Injector -N33-
5 - Motronic Engine Control Module (ECM) -J220-
- Testing voltage supply of engine control module
- Procedure after voltage supply open circuit
- Replacing
6 - Ignition coils
- Ignition Coil -N-
- Ignition Coil2-N128-
- Ignition Coil3-N158-
- Ignition Coil 4 -N163-
7 - Wastegate bypass regulator valve -N75-
8 - Accelerator position sender -G79- and accelerator position sender 2 -G185-
- Fitting location, Fig.2
9 - Brake light switch -F- and brake pedal position switch -F47-
- Fitting location, Fig.6
10 - Clutch vacuum vent valve switch -F36-
- Fitting location, Fig.7
11 - Instrument cluster
- With Malfunction Indicator (Lamp MIL) -K83- (exhaust emissions warning lamp) Notes for MIL warning lamp
- With fault lamp for Electronic Power Control (EPC) warning lamp -K132-. Notes for EPC- control lamp
12 - Motronic Engine Control Module (ECM) power supply relay -J271-
- Installation location, Fig.9
13 - Secondary Air Injection (AIR) pump relay -J299-
- Installation location, Fig.9
14 - Mass Air Flow (MAF) sensor -G70-
15 - Engine Coolant Temperature (ECT) sensor -G62-
- If necessary release pressure in cooling system before removing
16 - Valve -1- for camshaft adjustment -N205-
17 - Fuel pressure regulator
18 - Engine Speed (RPM) Sensor-G28-
19 - Knock Sensor (KS) 2 -G66-
20 - Recirculating valve for turbocharger -N249-
- Installation location, Fig.1.
21 - 3 pin connector
- Qty. 3
- Installation location, Fig.5
- For knock sensor 1 -G61
- For engine speed sender -G28
- For knock sensor 2 -G66
22 - Secondary Air Injection (AIR) solenoid valve -N112-
- Installation location, Fig.1
23 - Knock Sensor (KS) 1 -G61-
24 - Intake Air Temperature (IAT) Sensor -G42-
25 - Secondary Air Injection (AIR) pump motor -V101-
26 - Pressure switch/power steering -F88-
- Installation location, Fig.8
27 - Throttle valve control module -J338-
- With Throttle drive (power accelerator actuation) -G186-, Angle sensor -1- for throttle drive (power accelerator actuation) -G187- and Angle sensor -2- for throttle drive (power accelerator actuation) -G188-
- If replaced perform adaption
28 - Evaporative Emission (EVAP) canister -N80-
29 - Charge air pressure sensor -G31-
- Screwed onto top of charge air cooler
Fig. 1 Installation location of recirculating valve for turbocharger -N249- and Secondary Air Injection (AIR) solenoid valve -N112-
- Installation location: under metal bracket at front of intake manifold
1 - Secondary Air Injection (AIR) Solenoid Valve -N112-
2 - Non-return valve
3 - To vacuum reservoir
4 - To mechanical air recirculation valve
5 - To combination valve of secondary air system
6 - To connection on intake manifold
7 - Recirculating valve for turbocharger -N249-
Fig. 2 Installation location of accelerator position senders -G79- and -G185-
Fig. 3 Installation location of oxygen sensors and connector cover
1 - Heated oxygen sensor (HO2S) -G39- and oxygen sensor (O2S) heater -Z19-
2 - Connector cover
3 - Oxygen Sensor (O2S) behind three way catalytic converter (TWC)-G130- with oxygen sensor (O2S) heater 1 -Z29-
The connectors for oxygen sensors and oxygen sensor heaters are accessible after unscrewing the connector cover from the underside of the vehicle (right side) -arrows-.
Fig. 4 Color coding of oxygen sensor connectors
Black connector Heated oxygen sensor (HO2S) -G39- and oxygen sensor (O2S) heater -Z19-
Brown connector Oxygen Sensor (O2S) behind three way catalytic converter (TWC) -G130- with oxygen sensor (O2S) heater 1 -Z29-
Fig. 5 Installation locations of 3-pin connectors
1 - For knock sensor (KS) 1 -G61-
2 - For engine speed (RPM) sensor -G28-
3 - For knock sensor (KS) 2 -G66-
Fig. 6 Installation location of brake light switch -F- and brake pedal switch (cruise control/diesel direct fuel injection -F47-
Fig. 7 Installation location of clutch vacuum vent valve switch -F36-
Fig. 8 Installation location of pressure switch/power steering -F88-
Fig. 9 Installation location of Motronic Engine Control Module (ECM) Power Supply Relay -J271- and Secondary Air Injection (AIR) Pump Relay-J299-
- Under cover on bulkhead (left side)
1 - Motronic Engine Control Module (ECM) Power Supply Relay-J271-
2 - Secondary Air Injection (AIR) Pump Relay -J299-
NOTE: To remove protective cover on vehicles with suspension turret stiffener strut, disengage and move down relay carrier on bulkhead. If necessary, also unplug connector on mass air flow sensor.