Fuel Delivery and Air Induction: Locations
Fuel Injection and Ignition, Servicing
Component Locations, Overview
NOTES:
- The Engine Control Module (ECM) has On Board Diagnostic (OBD) capability Before carrying out troubleshooting and repairs, DTC memory must be checked. Vacuum hoses and connections must also be checked (unmetered air).
- Fuel lines in the engine compartment must only be secured using spring type clips. The use of clamp or screw type clips is not permissible.
- Components marked with a * are checked via the On Board Diagnostic (OBD). Testing and Inspection
- Components marked with a * *can be checked with output Diagnostic Test Mode (DTM). Testing and Inspection
- For trouble-free operation of the electrical components, a voltage of at least 11.5 V is necessary.
- Do not use sealants containing silicone. Particles of silicone drawn into the engine will not be burned in the engine and will damage the oxygen sensor.
- When performing some repairs, it is possible that the control module will recognize a malfunction and store a DTC. After completing all checks and repairs DTC memory must be checked and, if necessary erased (See page 01-79), and the readiness code must be generated. Testing and Inspection
- Safety precautions. Technician Safety Information
- Rules for cleanliness. [1][2]Technician Safety Information
- Technical data. Specifications
1 - Evaporative Emissions (EVAP) canister purge regulator valve -N80- (EVAP)*/**
- EVAP system
2 - Intake manifold
Upper section:
- Disassembling and assembling. Intake Manifold Upper Section, Disassembling and Assembling
Lower section:
- Disassembling and assembling. Intake Manifold Lower Section, Disassembling and Assembling
3 - Harness connector
- Only disconnect or connect with ignition switched off
- Release to disconnect
4 - Motronic Engine Control Module (ECM) -J22O-*
- Checking voltage supply. Testing and Inspection
- Voltage supply open circuit, correcting. Testing and Inspection
- Replacing. Service and Repair
- Coding. Testing and Inspection
- If replaced, carry out basic setting See "ECM to Throttle Valve Control Module, Adaptation". Testing and Inspection
5 - 28-pin harness connector
- Only disconnect or connect with ignition switched off
- Release to disconnect
6 - Throttle valve control module -J338-*
7 - Positive Crankshaft Ventilation (PCV) heating element -N79-
8 - Secondary Air Injection (AIR) solenoid valve -N112-*/**
9 - Secondary Air Injection (AIR) pump relay -J299-*/**
- Removing and installing components of secondary air system
10 - Mass Air Flow (MAF) sensor -G7O-* with Intake Air Temperature (EAT) sensor -G42-*
11 - Air cleaner
- Disassembling and assembling. Service and Repair
12 - 4-pin harness connector
- Connector terminals -1- and -3- for Engine Coolant Temperature (ECT) sensor -C62-
- Terminals 1 and 3 are gold plated
13 - Engine Coolant Temperature (ECT) sensor -G62-*
- Blue
- For Engine Control Module (ECM)
- With Engine Coolant Temperature (ECT) sensor -G2-
- If necessary, release pressure in cooling system before removing
- Connector terminals -1- and -3- for Engine Coolant Temperature (ECT) sensor -G62-
- Terminals -1- and -3- are gold plated
14 - O-ring
- Replace if damaged
15 - Retaining clip
- Make sure clip is seated securely
16 - Cyl. 1, 2, 3 & 4 fuel injectors (-N30- through -N33-)*/**
- Air shrouded
17 - Ignition coil -N- and ignition coil 2 -N128-
- With power output stage -N122- See "Ignition System Components, Removing and Installing", item 12. Service and Repair
18 - Secondary Injection Air (AIR) pump motor -V101-**
- Secondary air system
19 - 3-pin harness connector
- Grey
- For engine speed (RPM) sensor -G28-
20 - 10 Nm (7 ft lb)
21 - Engine speed (RPM) sensor -G28-*
- Checking. Testing and Inspection
22 - Knock Sensor (KS) 2 -G66-*
- Brown harness connector
- See "Ignition System Components, Removing and Installing", item 5. Service and Repair
- Sensor and harness connector terminals are gold plated
23 - Knock Sensor (KS) 1 -G61-*
- Black harness connector
- See "Ignition System Components, Removing and Installing", item 7. Service and Repair
- Sensor and harness connector terminals are gold plated
24 - Fuel pressure regulator
25 - 4-pin harness connector
- Black
- For Heated Oxygen Sensor (H02S) -039- before Three Way Catalytic Converter (TWC) and Oxygen Sensor (02S) heater -Z19-
- Terminals -3- and -4- are gold plated
- Located at right on underside of vehicle
26 - Heated Oxygen Sensor (HO2S) -G39- before Three Way Catalytic Converter (TWC)*
- 50 Nm (37 ft lb)
- Location: in exhaust manifold
- Grease only threads with G 052 112 A3" (grease must not get into the slots on probe body)
- Remove and install using special tool 3337
- Oxygen sensor heater voltage supply via Fuel Pump (FP) relay -J17-
- Checking oxygen sensor heater before Three Way Catalytic Converter (TWC). Testing and Inspection
- Checking oxygen sensor and control before Three Way Catalytic Converter (TWC). Testing and Inspection
- Checking oxygen sensor aging oxygen sensor 1. Testing and Inspection
27 - 4-pin harness connector
- Brown
- For oxygen sensor behind Three Way Catalytic Converter (TWC) -G130- and heater for Lambda probe 1 -Z29-
- Terminals -3- and -4- are gold plated
- Located at right on underside of vehicle
28 - Oxygen sensor behind Three Way Catalytic Converter (TWC) -G13O-*
- 50 Nm (37 ft lb)
- Location: in rear of Three Way Catalytic Converter (TWC)
- Grease only threads with "G 052 112 A3' (grease must not get into slots on probe body)
- Remove and install using 3337
- Oxygen sensor heater voltage supply via Fuel Pump (FP) relay -J17-
- Checking oxygen sensor healer for oxygen sensor after Three Way Catalytic Converter (TWC). Testing and Inspection
- Checking oxygen sensor and Oxygen Sensor (O2S) control after Three Way Catalytic Converter (TWC). Testing and Inspection
29 - Camshaft Position (CMP) sensor -G40-*