Component Locations Overview
Component Location Overview
Components A through N are not depicted in the illustration.
1 - Evaporative emission (EVAP) canister purge regulator valve (N80)
• => [ Connector assignment ]
2 - Engine Control Module (ECM) (J623)
• => [ E-box in plenum chamber ]
• Removing and installing => [ Engine Control Module, Replacing ] Service and Repair
3 - Mass air flow (MAF) sensor (G70) with intake air temperature (IAT) sensor (G42)
4 - Camshaft Adjustment Valve 1 (N205)
5 - 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)
6 - Secondary air injection (AIR) solenoid valve (N112)
7 - Camshaft position (CMP) sensor 2 (G163)
• Cylinder bank 2
8 - Fuel pressure regulator
• Not installed with engine code BGK
9 - Ignition coils with power output stages
• Cylinder bank 2
• Removing and installing => [ Ignition Coil ] Service and Repair
10 - Camshaft Adjustment Valve 2 (N208)
11 - 3-pin connector
• For knock sensor (KS) 1 (G61)
• For knock sensor (KS) 2 (G66)
• => [ Knock sensor connectors ]
12 - Intake manifold change-over valve (N156)
• Engine code BFM and BGK 4.2L, => [ Front view (engine code BFM and BGK 4.2L) ]
13 - Manifold change-over valve (N261)
• Engine code BFM and BGK 4.2L, Intake manifold change-over valve (N335), => [ Front view (engine code BFM and BGK 4.2L) ]
14 - Camshaft Position (CMP) sensor (G40)
• Cylinder bank 1
15 - Ignition coils with power output stages
• Cylinder bank 1
• Removing and installing => [ Ignition Coil ] Service and Repair
16 - Secondary air injection (AIR) pump motor (V101)
• Below longitudinal member, right side
• => [ Secondary Air Injection (AIR) pump (below right
longmember) ]
A - Emissions Malfunction Indicator Lamp "MIL"
• In instrument cluster (meaning of lamps => [ Emissions Malfunction Indicator Lamp (MIL) ] )
B - "EPC" Warning lamp
• In instrument cluster (meaning of lamps => [ EPC warning lamp ] )
C - Throttle Position (TP) Sensor (G79) and Accelerator Pedal Position Sensor 2 (G185)
• In footwell on accelerator pedal (both sensors are integrated into one housing)
D - Fuel pump (FP) relay (J17)
• 5-pin relay carrier in passenger's footwell, position 4
• => [ 5-pin relay carrier in passenger footwell ]
E - Fuel Pump (FP) 2 Relay (J49)
• Relay and fuse holder in luggage compartment, right side, relay position 3
• => [ Relay and fuse holder, in luggage compartment,
right side ]
F - Secondary air injection (AIR) pump relay (J299)
• 3-pin relay carrier in E-box plenum chamber, relay position 3
• => [ 4-pin relay carrier in E-box plenum chamber ]
G - Motronic engine control module (ECM) power supply relay (J271)
• 4-pin relay carrier in E-box plenum chamber
• => [ 4-pin relay carrier in E-box plenum chamber ]
H - Starter Relay (J53)
• => [ 5-pin relay carrier in passenger footwell ]
I - Starter Relay 2 (J695)
• => [ 5-pin relay carrier in passenger footwell ]
J - 3-pin connector for Engine Speed (RPM) Sensor (G28)
• => [ Connector strip (bolted to underside of transmission) ]
K - 4-pin connection for heated oxygen sensor (HO2S) (G39) and oxygen sensor heater (Z19) before catalytic converter
• Bank 1
• Connector => [ Connector assignment ]
• Heated Oxygen Sensor (HO2S) (G39), removing and installing => [ Oxygen Sensors before Catalytic Converter ] Oxygen Sensors before Catalytic Converter
L - 4-pin connection for Heated Oxygen Sensor (HO2S) 2 (G108) and Oxygen Sensor (O2S) Heater 2 (Z28) before catalytic converter
• Bank 2
• Connector => [ Connector assignment ]
• Heated Oxygen Sensor (HO2S) 2 (G108), removing and installing => [ Oxygen Sensors before Catalytic Converter ] Oxygen Sensors before Catalytic Converter
M - 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)
• Bank 1
• Connector => [ Connector strip (bolted to underside of transmission) ]
• Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130), removing and installing => [ Oxygen Sensor after Catalytic Converter, Bank 1 ] Oxygen Sensor After Catalytic Converter, Bank 1
N - 4-pin connection for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G131) and Oxygen Sensor (O2S) Heater 2 (behind Three Way Catalytic Converter (TWC)) (Z30)
• Bank 2
• => [ Connector strip (bolted to underside of transmission) ]
• Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131), removing and installing => [ Oxygen Sensor after Catalytic Converter, Bank 2 ] Oxygen Sensor After Catalytic Converter, Bank 2
5-pin relay carrier in passenger footwell
2 Starter Relay (J53)
3 Starter Relay 2 (J695)
4 Fuel pump (FP) relay (J17)
See
Relay and fuse holder, in luggage compartment, right side
3 Fuel Pump (FP) 2 Relay (J49)
See
4-pin relay carrier in E-box plenum chamber
1 Secondary Air Injection (AIR) Pump Relay (J299), relay position 1
2 From MY 2004 Motronic Engine Control Module (ECM) Power Supply Relay (J271)
3 MY 2003 Motronic Engine Control Module (ECM) Power Supply Relay (J271)
See
Emissions Malfunction Indicator Lamp (MIL)
• 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. Check DTC memory for Engine Control Module (ECM) and automatic 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 throttle control system.
With the ignition on, the engine control module (ECM) switches the EPC lamp on.
After the engine is started, the engine control module (ECM) tests all components important to the function of the EPC system.
While these components are being tested, the EPC lamp stays lit for approx. 3 seconds. If a malfunction is detected during these tests, the lamp will remain lit constantly.
If malfunctions are detected in the 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.
Connector assignment
1 Evaporative emission (EVAP) canister purge regulator valve (N80)
2 4-pin connection for heated oxygen sensor (HO2S) 2 (G108) and oxygen sensor (O2S) heater 2 (Z28) before catalytic converter of bank 2
3 4-pin connection for heated oxygen sensor (HO2S) (G39) and oxygen sensor heater (Z19) before catalytic converter of bank 1
E-box in plenum chamber
1 Engine control module (J623)
Connector strip (bolted to underside of transmission)
1 3-pin connector for Engine Speed (RPM) Sensor (G28)
2 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
3 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
Knock sensor connectors
1 3-pin connector for Knock Sensor (KS) 1 (G61), cylinder bank 1
2 3-pin connector for Knock Sensor (KS) 2 (G66), cylinder bank 2
Front view (engine code BFM and BGK 4.2L)
1 Intake manifold change-over valve (N156)
Activation for both vacuum diaphragms
2 Vacuum diaphragms for intake manifold change-over
3 Intake air switch-over valve (N335)
Activation for flap in air filter
a T-connector for vacuum supply from Intake Manifold Tuning (IMT) Valve (N156)
b Vacuum supply from intake manifold
c Vacuum line to low pressure reservoir (vacuum reservoir)
d Vacuum supply T-connector from Intake Air Switch-Over valve (N335) and low pressure reservoir
e T-connector for vacuum supply from Intake Manifold Tuning (IMT) Valve (N156)
f Vacuum line to flap in air filter
Secondary air injection (AIR) solenoid valve (N112)
1 Secondary air injection (AIR) solenoid valve (N112)
Secondary Air Injection (AIR) pump (below right longmember)
1 Secondary air injection (AIR) pump motor (V101)