A3 Mk2
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1 - | Vacuum unit for intake manifold flap |
2 - | Intake manifold pressure sender -G71- with intake air temperature sender -G42- |
q | → Fig. |
t | Intake manifold flap potentiometer -G336- → Fig. |
t | Intake manifold flap air flow control valve -N316- → Fig. |
3 - | Fuel pressure sender for low pressure -G410- |
q | Not fitted on models with engine code BLF |
q | Engine code BAG → Fig. |
q | Engine code BLP → Fig. |
4 - | Fuel pressure regulating valve -N276- |
q | → Fig. |
5 - | Motronic control unit -J220- with ambient pressure sender |
q | Removing and installing → Chapter |
6 - | Activated charcoal filter solenoid valve 1 -N80- |
q | → Fig. |
7 - | Single-plunger high-pressure fuel pump |
q | The high-pressure fuel pump should only be removed and installed when the engine is cold. |
q | The fuel system must not be under pressure. For procedure, refer to → Chapter |
q | When installing the high-pressure fuel pump, it is essential to ensure that no dirt enters the fuel system. |
q | Install pipes free of tension. |
8 - | Throttle valve module -J338-, throttle valve drive for electric throttle operation -G186- |
q | Throttle valve drive angle sender 1 for electric throttle -G187- and throttle valve drive angle sender 2 for electric throttle -G188- |
q | → Fig. |
9 - | Exhaust gas recirculation valve -N18- with exhaust gas recirculation potentiometer -G212- |
q | → Fig. |
q | After replacing the engine control unit or the exhaust gas recirculation valve -N18-, the engine control unit and the exhaust gas recirculation valve must be adapted -N18- to one another → Rep. Gr.26. |
10 - | Radiator outlet coolant temperature sender -G83- |
q | → Fig. |
11 - | Coolant temperature sender -G62- |
q | → Fig. |
12 - | Electrical connectors for Lambda probe -G39- and exhaust gas temperature sender 1 -G235- |
q | Engine code BLP → Fig. |
q | Engine code BAG → Fig. |
13 - | Hall sender -G40- |
q | → Fig. |
14 - | Exhaust gas temperature sender 1 -G235- |
q | Only fitted on models with engine codes BAG and BLP |
q | Engine code BAG → Fig. |
q | Fitted before main catalytic converter on models with engine code BLP |
q | Removing and installing → Chapter |
15 - | Lambda probe -G39- |
q | → Fig. |
q | Removing and installing → Chapter |
16 - | Ignition coils with output stages |
q | Ignition coil 1 with output stage -N70- |
q | Ignition coil 2 with output stage -N127- |
q | Ignition coil 3 with output stage -N291- |
q | Ignition coil 4 with output stage -N292- |
17 - | Inlet camshaft control valve 1 -N205- |
A - | Diagnostic connector |
q | In driver's knee restraint |
B - | Fuel pump control unit -J538- |
q | Adaption must be performed after renewing fuel pump control unit -J538-. Basic setting, measured value block 238, refer to → Rep. Gr.20 |
q | → Fig. |
C - | “EPC” warning lamp |
q | In dash panel insert |
D - | “MIL” exhaust emissions warning lamp |
q | In dash panel insert |
E - | NOx sender -G295- |
q | Only fitted on models with engine codes BAG and BLP |
q | → Fig. |
q | Removing and installing → Chapter |
F - | Lambda probe after catalytic converter -G130- |
q | On engines with code letters BLF a Lambda probe after catalytic converter -G130- is fitted in place of the NOx sender -G295-. A 4-pin electrical connector is used. |
q | Removing and installing → Chapter |
G - | NOx sensor control unit -J583- |
q | Only fitted on models with engine codes BAG and BLP |
q | → Fig. |
H - | Accelerator position sender -G79- and accelerator position sender 2 -G185- |
q | In footwell on accelerator pedal (both senders are accommodated in one housing) |
q | → Fig. |
I - | Motronic relay |
q | Motronic current supply relay -J271- → Fig. |
q | Terminal 15 voltage supply relay -J329- → Fig. |
q | Voltage supply relay - terminal 50 -J682- → Fig. |
J - | Injectors |
q | In fuel rail |
q | Injector, cylinder 1 -N30- |
q | Injector, cylinder 2 -N31- |
q | Injector, cylinder 3 -N32- |
q | Injector, cylinder 4 -N33- |
The fuel injectors are high-pressure injectors. They inject fuel at high pressure (maximum approx. 110 bar) directly into the cylinder. |
K - | Engine speed sender -G28- |
q | → Fig. |
L - | Knock sensor 1 -G61- |
q | → Fig. |
M - | Fuel pressure sender -G247- |
q | → Fig. |
N - | Intake air temperature sender 2 -G299- |
q | → Fig. |
q | Integrated in engine compartment cover |
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