catalytic converter AUDI A8 1999 D2 / 1.G ATQ Engine Oxygen Sensor Control Checking
Page 44 of 63
24-112
Testing Oxygen Sensor Wires
Component location of harness connectors
Overview of component locations, page Page
24
-5
- Disconnect green 4-pin harness connector 1 to
Oxygen Sensor (O2S) Behind Three Way
Catalytic Converter (TWC) -G130-.
- Connect VAG1598/31 test box at wiring harness
to ECM, do not connect ECM Page 24
-17
.
- Check the following wire connections for open circuit.Harness connector
Terminal
VAG1598/31 test box
Socket
3 68
4 69
- Repair open circuit if necessary.
- Check wires to each other for short circuit.Harness connector
Terminal
VAG1598/31 test box
Socket
4 68
Pa
ge 44 of 63 Ox
yg
en sensor control, checkin
g
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.3
Page 46 of 63
24-114
Check oxygen sensor wires for Oxygen
Sensor (O2S) 2 Behind Three Way Catalytic
Converter (TWC) -G131-.
Component location of harness connectors
Overview of component locations, page Page
24
-5
- Disconnect brown 4-pin harness connector 2 to
Oxygen Sensor (O2S) 2 Behind Three Way
Catalytic Converter (TWC) -G131-.
- Connect VAG1598/31 test box at wiring harness
to ECM, do not connect ECM Page 24
-17
.
- Check the following wire connections for open circuit.Harness connector
Terminal
VAG1598/31 test box
Socket
3 10
4 11
- Repair open circuit if necessary.
- Check wires to each other for short circuit.Harness connector
Terminal
VAG1598/31 test box
Socket
Pa
ge 46 of 63 Ox
yg
en sensor control, checkin
g
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.3
Page 49 of 63
24-116
Oxygen sensor heating for oxygen
sensors before and behind catalytic
converter, checking
Special Tools and Equipment
VAG1526A
VAG1594A
VAG1598/31
VAG1788/10 RPM adjuster
VAS5051 with VAG5051/1
- or
VAG1551 with VAG1551/3B
Pa
ge 49 of 63 Ox
yg
en sensor control, checkin
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.3
Page 60 of 63
24-124
- Check the following wire connection for open circuit:
Oxygen Sensor (O2S) heater -Z19- bank 1 before catalytic converter:
Harness connector
Terminal
VAG1598/31 test box
Socket
2 5
Oxygen Sensor (O2S) heater -Z28- bank 2 before catalytic converter:
Harness connector
Terminal
VAG1598/31 test box
Socket
2 4
Oxygen Sensor (O2S) heater -Z29- bank 1 behind catalytic converter:
Harness connector
Terminal
VAG1598/31 test box
Socket
2 63
Oxygen Sensor (O2S) heater -Z30- bank 2 behind catalytic converter:
Harness connector
Terminal
VAG1598/31 test box
Socket
2 6
Pa
ge 60 of 63 Ox
yg
en sensor control, checkin
g
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.3