heater AUDI A4 1999 B5 / 1.G AFC Engine Multiport Fuel Injection And Ignition System Workshop Manual
Page 1 of 6
28-1
Multiport Fuel Injection (MFI)
and ignition system Component overview
CAUTION!
Fire hazard! Do not smoke, work near heaters or
open flame, or have anything in the area that
could ignite fuel.
Not shown
- Oxygen Sensor (O2S) behind Three Way
Catalytic Converter (TWC) -G130- (bank 1,
directly behind right-side three-way catalytic
converter)
- Oxygen Sensor (O2S) 2 behind Three Way
Catalytic Converter (TWC) -G131- (bank 2,
directly behind left-side three-way catalytic
converter)
Pa
ge 1 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
Page 2 of 6
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
Page 4 of 6
28-4
18 -
Harness connector
4-pin, greenFor Heated Oxygen Sensor (HO2S) behind
Three Way Catalytic Converter (TWC) -
G130- and Oxygen Sensor (O2S) heater -
Z29- (bank 1)
19 -
Harness connector 4-pin, brownFor Heated Oxygen Sensor (HO2S) 2
behind Three Way Catalytic Converter
(TWC) -G131- and Oxygen Sensor (O2S) 2
heater -Z30- (bank 2)
20 -
Harness connector 4-pin, blackFor Heated Oxygen Sensor (HO2S) -G39-
and Oxygen Sensor (O2S) heater -Z19-
(bank 1)
21 -
Harness connector 3-pinFor Knock Sensor (KS) 1 -G61-
Pa
ge 4 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