System Components

Safety precautions See 'Computers and Control Systems, Service Precautions, Technician Safety Information.' Service Precautions
Rules for cleanliness See 'Computers and Control Systems, Service Precautions, Vehicle Damage Warnings.' Service Precautions
Technical data See 'Computers and Control Systems, Testing and Inspection, Procedures, Description of On-Board Diagnostics, Technical Data.' Testing and Inspection
Engine operating modes, checking: See 'Engine Control Module, Testing and Inspection, Procedures, Engine Operating Modes.' Testing and Inspection

1 - Intake manifold, upper section
2 - Engine Control Module* (Motronic J220)
- Installation location: in protective housing, plenum chamber, left
- Voltage supply, checking See 'Engine Control Module, Testing and Inspection, Procedures, ECM Voltage Supply, Checking.' Testing and Inspection
- Procedure after Voltage supply open circuit See 'Engine Control Module, Testing and Inspection, Procedures, ECM Voltage Supply Open Circuit, Correcting.' Testing and Inspection
- Replace See 'Engine Control Module, Service and Repair, Engine Control Module Replacing.' Service and Repair
3 - 28-pin harness connector
- Only disconnect or connect with ignition switched OFF
- Release to disconnect
4 - Connector
- Only disconnect or connect with ignition switched OFF
- Release 10 disconnect
5 - 2-pin harness connector
- for Secondary Air Injection solenoid valve N112
6 - Air filter
- Disassembling and assembling See 'Fuel Delivery and Air Induction, Air Cleaner Housing, Service and Repair.' Service and Repair
7 - 10 Nm (7 ft lb)
8 - to Secondary Air Injection pump V101
9 - Mass Air Flow sensor G70*
- Checking See 'Air Flow Meter/Sensor, Testing and Inspection, Procedures.' Testing and Inspection
10 - Air duct
- in wheel housing
11 - 4-pin harness connector
- Blue
- for Engine Coolant Temperature sensor G62
12 - Engine Coolant Temperature sensor G62*
- Blue
- for Engine Control Module
- with Engine Coolant Temperature sensor G2
- Checking See 'Coolant Temperature Sensor, Testing and Inspection, Procedures.'
- Release cooling system pressure before removing
- Resistance graph See 'Coolant Temperature Sensor, Specifications, Electrical.'
13 - Retaining clip
- Ensure it is securely seated
14 - 3-pin harness connector
- Grey
- for Engine Speed sensor
15 - Engine Speed sensor G28*
- In transmission housing above starter ring gear
- Checking See 'Engine Speed Sensor, Testing and Inspection, Procedures.' Testing and Inspection
16 - O-ring
- Replace if damaged
17 - Spacer
18 - Oxygen sensor 2 after Three Way Catalyst G130*
- 50 Nm (37 ft lb)
- Oxygen sensor heater after Three Way Catalyst, checking See 'Oxygen Sensor, Testing and Inspection, Procedures.' Testing and Inspection
- Oxygen sensor and Oxygen sensor control after Three Way Catalyst, checking See 'Oxygen Sensor, Testing and Inspection, Procedures.' Testing and Inspection
- Additional features See (item 20)
19 - 4-pin harness connector
- Brown
- for Oxygen sensor 2 after Three Way Catalyst G130 and Oxygen sensor heater Z29, cylinder bank 1
20 - Oxygen sensor 1 G39*
- 50 Nm (37 ft lb)
- In front exhaust pipe
- Grease threads only with G5; it must not get into the slots on the sensor body
- Sensor heater Voltage supply via fuel pump relay J17
- Oxygen sensor heater, checking See 'Oxygen Sensor, Testing and Inspection, Procedures.' Testing and Inspection
- Oxygen sensor and Oxygen sensor control, checking See 'Oxygen Sensor, Testing and Inspection, Procedures.' Testing and Inspection
- Oxygen sensor and Oxygen sensor control after Three Way Catalyst, checking See 'Oxygen Sensor, Testing and Inspection, Procedures.' Testing and Inspection
21 - 4-pin harness connector
- Black
- for Oxygen sensor 1 G39 and Oxygen sensor heater Z19, cylinder bank 2
22 - Intake rail, lower section
- Disassembling and assembling lower section See 'Fuel Delivery and Air Induction, Intake Air Plenum, Service and Repair.' Service and Repair
23 - Fuel rail with injectors
- Disassembling and assembling lower section See 'Fuel Delivery and Air Induction, Intake Air Plenum, Service and Repair.' Service and Repair
24 - Return line
- Blue
- Secure with spring clips
- Ensure it is securely seated
- to fuel delivery unit in fuel tank
25 - Supply line/hose
- Black
- from fuel filter
26 - 2-pin harness connector
- Black
- for injectors N30 to N33
27 - Gasket
- Replace if damaged
28 - 20 Nm (15 ft lb)
29 - to Positive Crankcase Ventilation valve
30 - Intake hose