Injection System
Injection system, servicing
Component locations overview
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 the footwell
B- Throttle Position (TP) sensor -G79- and Sender 2 for accelerator pedal position -G185-
^ In footwell on accelerator pedal
C- Clutch vacuum vent valve switch -F36-
^ In footwell
1- EVAP canister pump regulator valve -N80-
2- Return line
^ Secure with spring-type clips
3- Supply line
^ Secure with spring-type clips
4- Camshaft Position (CMP) sensor -G40-
^ Below upper toothed belt guard
5- Intake manifold change-over valve -N156-
6- Intake manifold upper part
7- Intake manifold lower part
8- Combi-valve
9- Throttle valve control module - J338-
10- Positive Crankcase Ventilation (PCV) heating element -N79-
^ For crankcase breather
^ Check heating element voltage supply between contacts 1 and 2 with engine running. Specification : min. 11.5 V
11- 81-pin connector
^ Only disconnect or connect with ignition switched off
^ Release to disconnect
12- Engine Control Module (ECM)
13- 40-pin connector
^ Only disconnect or connect with ignition switched off
^ Release to disconnect
14- Protective housing for relays
Location of:
^ Secondary Air Injection (AIR) pump relay -J299-
^ Motronic Engine Control Module ((ECM) power supply relay -J271-
15- Engine Coolant Temperature (ECT) sensor -G2-
^ Green
^ Gold plated contacts
^ For engine control module
^ With ECT sensor -G2-
^ Release pressure in cooling system if necessary before removing components
16- Air cleaner
17- Mass Air Flow (MAP) sensor -G70- with Intake Air Temperature (IAT) sensor -G42-
^ Gold plated contacts
18- 3-pin connector
^ For engine speed (RPM) sensor -G28
19- Ignition coils with final output stages - N70-, -N127-, -N291-, -N292-
20- 10 Nm
21- Engine speed (RPM) sensor -G28
22- Secondary Air Injection (AIR) pump motor -V101 -
23- Injector -N30-...-N33
24- Knock Sensor (KS) 2 -G66
25- Knock Sensor (KS) 1 -G61
^ Gold plated contacts
26- Intake Manifold Tuning (IMT) valve 2 -N261 -
27- 4-pin connector
^ Location: On right on underside of vehicle, Refer to Fig. 2
28- Oxygen Sensor (02S) Behind Three Way Catalytic Converter (TWC) -G130-, 50 Nm
^ When replacing erase Diagnostic Trouble Code (DTC) memory
^ Grease only threads with Part No. G 052 112 A3 hot bolt paste (anti-seize compound). Grease must not get into slots on sensor body.
^ Remove and install with 3337
29- 6-pin connector
^ Location: On right on underside of vehicle, Refer to Fig. 1
30- Heated Oxygen Sensor (HO2S) -G39-, 50 Nm
^ When replacing erase Diagnostic Trouble Code (DTC) memory
^ Location: In exhaust manifold
^ Grease only threads with Part No. G 052 112 A3 hot bolt paste (anti-seize compound). Grease must not get into slots on sensor body.
^ Remove and install with 3337
31- Fuel pressure regulator
Fig. 1 Location of 6-pin connector -1- for Heated Oxygen Sensor (H02S)
Fig. 2 Location of 4-pin connector -1- for Oxygen Sensor (02S) Behind Three Way Catalytic Converter (TWC)