Computers and Control Systems: Locations

Overview Of Component Locations (Vehicles With Engine Code BDF)

Component Location Overview:

The following components are not displayed in the installation overview:
Malfunction Indicator Lamp (MIL) -K83-*
Electronic Power Control (EPC) Warning Lamp -K132-*
Leak detection pump (LDP) -V144-*
- Under wheel housing liner in rear right wheel housing
Throttle Position (TP) Sensor -G79-*
Secondary Air Injection (AIR) Pump Relay -J299-*
- Installation location, See Fig. 1
Motronic Engine Control Module (ECM) Power Supply Relay -J271-*
- Installation location, See Fig. 1

The following components are displayed in the Component location overview:
1 Heated Oxygen Sensor (HO2S) -G39- bank 1*, 50 Nm
- Component location: in front catalytic converter
2 Connector
- Terminals are gold-plated
- Black, 6-pin
- For Heated Oxygen Sensor (HO2S) -G39-and Oxygen Sensor (O2S) Heater -Z19-
- Component location: At right vehicle underside
3 Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- bank 1*, 50 Nm
- Component location: In rear catalytic converter
4 Connector
- Black, 4-pin
- Terminals 3 and 4 gold-plated
- For Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-and Oxygen Sensor (O2S) Heater 1 -Z29-
- Component location: At right vehicle underside
5 Knock Sensor (KS) 1 -G61-*
- Component location: between cyl. 1 and cyl. 3
6 Connector
- for Engine Control Module (ECM)
- Switch ignition off before disconnecting or connecting connector
- disengage to pull off
7 Engine Control Module (ECM)*
(Motronic Engine Control Module (ECM) -J220-)
- Component location: in plenum chamber
8 Clutch Vacuum Vent Valve Switch -F36-*, Brake Light Switch -F- and Brake Pedal Switch (cruise control/Diesel Direct Fuel Injection) -F47-
- Component location: in left footwell
9 Camshaft Position (CMP) Sensor -G40-*
10 Valve -1- for camshaft adjustment -N205-*
11 Camshaft Adjustment Valve 1 (exhaust) -N318-*
12 Camshaft Position (CMP) Sensor 2 -G163-*
13 Protective housing
- Relay position assignment in protective housing, See Fig. 1
14 Mass Air Flow (MAF) Sensor -G70-* with Intake Air Temperature (IAT) Sensor -G42-*
15 Air filter housing
16 Fuel pressure regulator
17 Vacuum actuator
- for intake manifold change-over
18 Engine Coolant Temperature (ECT) Sensor -G62-*
19 Engine Speed (RPM) Sensor -G28-*
20 Knock Sensor (KS) 2 -G66-*
- Component location: between cyl. 4 and cyl. 6
21 Secondary Air Injection (AIR) Pump Motor -V101-*
22 Intake Manifold Change-Over Valve -N156-*
23 Secondary Air Injection (AIR) Solenoid Valve -N112-*
24 Fuel injector (Cylinder 1 Fuel Injector -N30- to Cylinder 4 Fuel Injector -N33-, Cylinder 5 Fuel Injector -N83-, Cylinder 6 Fuel Injector -N84-)*
25 Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-*
- Installation position: Arrow points in direction of flow
26 Throttle Valve Control Module -J338-*
- Heated by coolant
27 Combination valve
28 Ignition Coils with Power Output Stages (N70-, -N127-, -N291-, -N292-, -N323- and --N324-)*

Fig. 1 Relay position assignment in protective housing (engine compartment, left)







1 Secondary Air Injection (AIR) Pump Relay -J299-*
2 Motronic Engine Control Module (ECM) Power Supply Relay -J271-*

NOTE:
- Remove battery Ground (GND) strap if tools are necessary for removal of relays or control modules from the relay carrier.
- Obtain radio code for radios with anti-theft coding before disconnecting battery.
- Check relay activation.