Component Location Overview
Component Location Overview
Components A through H are Not Depicted in Exploded View Illustration.
1 - Engine control module (J623)
• Component location: In E-box in right plenum chamber
2 - Mass Air Flow (MAF) sensor (G70) with Intake Air Temperature (IAT) sensor (G42)
• Removing and installing => [ Mass Air Flow Sensor ] Service and Repair.
3 - Camshaft adjustment valve 1 (N205)
• => [ Engine Viewed from Rear ]
4 - Connector strip
• Connector assignment => [ Connector Strip on Right Side of Bulkhead ]
5 - Camshaft Position (CMP) sensor (G40)
• Cylinder bank 1
• => [ Engine Viewed from Rear ]
6 - Engine Coolant Temperature (ECT) sensor (G62)
7 - Throttle valve control module (J338)
• With Throttle drive (for Electronic Power Control (EPC)) (G186), throttle drive angle sensor 1 (for Electronic Power Control (EPC)) (G187) and throttle drive angle sensor 2 (for Electronic Power Control (EPC)) (G188)
• => [ Engine Viewed from Rear ]
8 - Evaporative emission (EVAP) canister purge solenoid valve (N80)
9 - Oil pressure switch (F1)
• => [ Engine Viewed from Rear ]
10 - Camshaft Position (CMP) sensor 2 (G163)
• Cylinder bank 2
• => [ Engine Viewed from Rear ]
11 - Connector strip
• Connector assignment
• => [ Connector Strip Beneath Coolant Reservoir ]
12 - Camshaft adjustment valve 2 (N208)
• => [ Engine Viewed from Rear ]
13 - Ignition coils with power output stages
• Cylinder bank 2
• To remove, puller for ignition coil (T10094) can be used.
14 - 3-pin harness connector
• For Knock Sensor (KS) 3 (G198)
• For Knock Sensor (KS) 4 (G199)
15 - Secondary Air Injection (AIR) solenoid valve (N112)
• => [ Engine Viewed from Front ]
16 - Intake manifold change over valve (N156)
• => [ Engine Viewed from Front ]
17 - 3-pin harness connector
• For Knock Sensor (KS) 1 (G61)
• For Knock Sensor (KS) 2 (G66)
• => [ Engine Viewed from Front ]
18 - Ignition coils with power output stages
• Cylinder bank 1
• To remove, puller for ignition coil (T10094) can be used.
19 - Intake air switch-over valve (N335)
• For controlling a flap in air filter housing
• The intake air switch-over valve (N335) is located behind air filter housing. The air filter housing must be completely removed to test the valve.
20 - Secondary Air Injection (AIR) pump motor (V101)
• Front bottom in driving direction
• => [ ]
A - Throttle Position (TP) sensor (G79) and accelerator pedal position sensor 2 (G185)
• In footwell on accelerator pedal (both sensors are integrated into one housing)
B - Brake light switch (F)
• In footwell on pedal mount near brake pedal
C - Clutch pedal switch (F36)
• In footwell on pedal mount near clutch pedal
D - Fuel pump (FP) relay (J17)
• In 3-socket relay carrier in plenum chamber, left side, relay position 2
• => [ Component Located on 3-socket Relay Carrier
in Left Plenum Chamber ]
E - Motronic Engine Control Module (ECM) power supply relay (J271)
• In 3-socket relay carrier in plenum chamber, left side, relay position 3
• => [ Component Located on 3-socket Relay Carrier
in Left Plenum Chamber ]
F - Secondary Air Injection (AIR) pump relay (J299)
• In 4-socket relay carrier in E-box, in right side of plenum chamber, relay position 3
• => [ Component Located on 4-socket Relay Carrier
in E-box of Right Plenum Chamber ]
G - Data Link connector (DLC)
• Located in knee bolster on driver's side
H - Engine speed (RPM) sensor (G28)
• In transmission housing over ring gear
Emissions Malfunction Indicator Lamp (MIL)
• The Malfunction Indicator Lamp (MIL) lights up when emissions-related malfunctions are recognized by the Engine Control Module (ECM).
• Component location of emissions MIL (CHECK): In instrument cluster
• The emissions MIL can blink or remain lit continuously. In any case, DTC memory must be checked.
If Malfunction Indicator Lamp (MIL) is Blinking
• A malfunction exists that, under these driving conditions, may damage the catalytic converters. In this case, driving may only be continued at a reduced load (until the MIL goes out or remains constantly lit) and malfunction must be eliminated as quickly as possible!
If Malfunction Indicator Lamp (MIL) is Constantly Lit
• A malfunction exists that causes increased emissions. Interrogate DTC memory of Engine Control Module (ECM) or transmission.
• For driveability problems or customer complaints where the emissions MIL is not lit, DTC memory must be checked after a function test of the MIL because malfunctions can be stored without causing the MIL to light up immediately.
EPC Warning Lamp
• "EPC" is an abbreviation and stands for Electronic Power Control, also known as electronic performance regulation (E-Gas).
• Component location of EPC warning lamp: In instrument cluster
With ignition on, the Engine Control Module (ECM) switches EPC lamp on.
After engine is started, Engine Control Module (ECM) tests all components important to function of EPC system.
While these components are being tested, EPC lamp stays lit for approximately 3 seconds. If a malfunction is detected during these tests, the lamp will remain lit constantly.
If malfunctions are detected in EPC system during engine operation, the ECM switches on the EPC warning lamp. The malfunction is stored in DTC memory of ECM at the same time.
Component Located on 3-socket Relay Carrier in Left Plenum Chamber
2 Fuel Pump (FP) relay (J17)
3 Motronic Engine Control Module (ECM) power supply relay (J271)
Component Located on 4-socket Relay Carrier in E-box of Right Plenum Chamber
3 Secondary Air Injection (AIR) pump relay (J299)
Connector Strip on Right Side of Bulkhead
1 6-pin connection for Heated Oxygen sensor (HO2S) (G39) and oxygen sensor heater (Z19) before catalytic converter of bank 1
2 2-pin connection for bank 1 camshaft adjustment valve 1 (N205)
3 4-pin connection for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) (G130) and Oxygen Sensor (O2S) heater 1 (behind Three Way Catalytic Converter (TWC)) (Z29) of bank 1
Connector Strip Beneath Coolant Reservoir
1 6-pin connection for Heated Oxygen Sensor (HO2S) 2 (G108) and Oxygen Sensor (O2S) heater 2 (Z28) before catalytic converter of bank 2
2 3-pin connection (gray) for engine speed (RPM) sensor (G28)
3 2-pin connection for bank 2 camshaft adjustment valve 2 (N208)
4 4-pin connection for Oxygen Sensor (O2S) 2 behind Three Way Catalytic Converter (TWC) (G131) and Oxygen Sensor (O2S) heater 2 (behind Three Way Catalytic Converter (TWC)) (Z30) of bank 2
Engine Viewed from Front
1 Vacuum diaphragm for intake manifold change-over
2 Knock sensor (KS) 1 (G61)
3 Knock sensor (KS) 2 (G66)
4 Intake manifold change over valve (N156)
5 Secondary Air Injection (AIR) solenoid valve (N112)
6 Knock sensor (KS) 3 (G198)
7 Knock sensor (KS) 4 (G199)
Engine Viewed from Rear
1 Camshaft adjustment valve 2 (N208)
2 Camshaft Position (CMP) sensor 2 (G163) cylinder bank 2
3 Oil pressure switch (F1)
4 Throttle valve control module (J338)
5 Engine Coolant Temperature (ECT) sensor (G62)
6 Camshaft Position (CMP) sensor (G40) cylinder bank 1
7 Camshaft adjustment valve 1 (N205)
Secondary Air Injection (AIR) Pump Motor (V101)
• Lower right, in driving direction