1999 AUDI A4 engine

28-2


1 -
Sensor for EVAP canister -G172-
2 -
Evaporative Emission (EVAP) canister
purge regulator valve -N80-
3 -
Fuel pressure regulator
4 -
Engine Coolant Temperature (ECT) sensor
-G62-
On coolant line behind cylinder head)
5 -
Ground connection On intake manifold
6 -
Harness connector 3-pinFor Knock Sensor (KS) 2 -G66-
7 -
Harness connector 4-pin, blackFor Heated Oxygen Sensor (HO2S) 2 -
G108- and Oxygen Sensor (O2S) 2 heater
-Z28- (bank 2)
8 -
Heated Oxygen Sensor (HO2S) 2 -G108- Bank 2
Pa
ge 2 of 6 Multi
port Fuel In
jection
(MFI
) and i
gnition s
yste
m
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.28.1

28-3


9 -
Harness connector
2-pin, blackFor EGR temperature sensor -G98-
10 -
Harness connector 3-pin, white, voltage supplyFor ignition coils 1, 2 and 3, -N-, -N128-
and -N158-
11 -
Crankshaft Position (CKP) sensor -G4- Timing reference mark on left side of
cylinder block
12 -
Knock Sensor (KS) 2 -G66-
13 -
Engine speed (RPM) sensor -G28-
14 -
Ignition coils 1, 2 and 3; -N-, -N128- and -
N158-
15 -
Fuel injectors
16 -
Knock Sensor (KS) 1 -G61-
17 -
Idle Air Control (IAC) valve -N71-
Pa
ge 3 of 6 Multi
port Fuel In
jection
(MFI
) and i
gnition s
yste
m
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.28.1

28-5


22 -
Intake manifold change-over valve -N156-
23 -
Throttle Position (TP) sensor -G69-
With integral Closed Throttle Position
(CTP) switch -F60-
24 -
EGR temperature sensor -G98- On intake manifold under throttle body
25 -
EGR vacuum regulator solenoid valve -
N18-
26 -
Engine Control Module (ECM) -J192- In plenum in electronics box
Pa
ge 5 of 6 Multi
port Fuel In
jection
(MFI
) and i
gnition s
yste
m
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.28.1

28-6


27 -
Camshaft Position (CMP) sensor -G40-
28 -
Harness connector
3-pin, grayFor engine speed (RPM) sensor -G28-
29 -
Harness connector 3-pin, blackFor Crankshaft Position (CKP) sensor -G4-
(timing reference mark sensor)
30 -
Heated Oxygen Sensor (HO2S) -G39- Bank 1
31 -
Mass Air Flow (MAF) sensor -G70-
32 -
Ground connection Right engine mount
33 -
Power output stage -N122- For ignition coilsA: 4-pin signal wires from ECMB: 3-pin ignition coil primary connections
Pa
ge 6 of 6 Multi
port Fuel In
jection
(MFI
) and i
gnition s
yste
m
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.28.1