AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

01-90

Output on GST and/or
on VAG 1551 scan tool
Possible malfunction cause

Malfunction repair
P1101 / 17509
(B1-S1) Voltage too
Low/Air Leak Harness connector for Heated Oxygen
Sensor (HO2S) -G39- (B1-S1) loose or
corroded due to moisture in the harness
connector

- Check harness connector for tight fit and
contact corrosion, if necessary reconnect
and/or clean, installation location page 24
-1

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
MIL Status:
MIL lights up
immediately
Leak in Bank 1 exhaust system before
Heated Oxygen Sensor (HO2S) -G39- (B1-
S1)

- Determine and repair leak

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again

Wiring connection to Heated Oxygen
Sensor (HO2S) -G39- (B1-S1) faulty, or
sensor -G39- faulty

- Check HO2S -G39- (B1-S1) page 24
-
49

For troubleshooting
Display group 010
Malfunction cause found: Yes
No
Continued next page

- Erase DTC memory, test drive and after
test drive, check DTC memory again
Pa
ge 121 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-91


Engine Control Module
(ECM) -J192- faulty

- Replace and code engine control module page 01
-265
erase DTC
memory and test drive check DTC memory
Note:
The malfunction "P1101 / 17509" is set 123 sec after engine start and at a coolant temperature over 30 C (86 F) as soon as
the oxygen sensor control has reached the rich limit for 2 sec more than 20 times (or 40 sec. without interruption).
Pa
ge 122 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-92

Output on GST and/or
on VAG 1551 scan tool
Possible malfunction cause

Malfunction repair
P1102 / 17510
Heating Circ. (B1-S1)
Short to B+ Harness connector for Oxygen Sensor
(O2S) heater -Z19- (B1-S1) loose or
corroded due to moisture in the harness
connector

- Check harness connector for tight fit and
contact corrosion, if necessary reconnect
and/or clean, installation location page 24
-1

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
MIL Status:
MIL lights up
immediately
Wiring connection of Oxygen Sensor
(O2S) heater -Z19- (B1-S1) faulty, or heater
-Z19- faulty

- Check O2S heater -Z19- (B1-S1) page 24
-51


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
For troubleshooting
Display group 040
Engine Control Module (ECM) -J192-
faulty

- Replace and code engine control module
page 01
-265
erase DTC memory and
test drive check DTC memory
Notes:

|The heating of the oxygen sensor probes in front of Three Way Catalytic Converter (TWC) is switched on with the fuel
pump relay, i.e. immediately at engine start.
Pa
ge 123 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

The malfunction "P1102 / 17510" is set after engine start as soon as the heating current is greater than 10 A for longer
than 80 ms at a battery voltage between 9 V and 16 V.
Pa
ge 124 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-93

Output on GST and/or
on VAG 1551 scan
tool Possible malfunction cause

Malfunction repair
P1104 / 17512
(B1-S2) Voltage too
Low/Air Leak Harness connector for Oxygen Sensor (O2S)
behind Three Way Catalytic Converter (TWC) -
G130- (B1-S2) loose or corroded due to moisture
in the harness connector

- Check harness connector for tight fit
and contact corrosion, if necessary
reconnect and/or clean, installation
location page 24
-1

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and
after test drive, check DTC memory
again
MIL Status:
MIL lights up
immediately
Leak in bank 1 exhaust system between
Heated Oxygen Sensor (HO2S) -G39- and
Oxygen Sensor (O2S) behind Three Way
Catalytic Converter (TWC) -G130-

- Find and repair leak
For troubleshooting
Display group 041
Malfunction cause found: Yes
No

- Erase DTC memory, test drive and
after test drive, check DTC memory
again
Pa
ge 125 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-94


Wiring connection to Oxygen Sensor (O2S) behind Three
Way Catalytic Converter (TWC) -G130- (B1-S2) faulty, or
sensor -G130- faulty

- Check O2S behind three way catalytic converter -
G130- (B1-S2) page 24
-53


Malfunction cause found: Yes
No
Continued next page

- Erase DTC memory, test drive and after test drive,
check DTC memory again

Engine Control Module (ECM) -J192- faulty

- Replace and code engine control module page 01
-265
erase DTC memory and test drive
check DTC memory
Note:
The malfunction "P1104 / 17512" is set 123 sec after engine start, coolant temperature over 80 C (176 F), oxygen sensor
control active, engine speed between 1500 min and 5000 min, load between 19% and 80% and probe heater switched on at
least 45 sec, as soon as the signal voltage is less than 0.040 V for longer than 60 sec.
Pa
ge 126 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-95

Output on GST and/or
on VAG 1551 scan tool
Possible malfunction cause

Malfunction repair
P1105 / 17513
Heating Circ. (B1-S2)
Short to B+ Harness connector for Oxygen Sensor
(O2S) heater -Z29- (B1-S2) loose or
corroded due to moisture in the harness
connector

- Check harness connector for tight fit and
contact corrosion, if necessary reconnect
and/or clean, installation location page 24
-1

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
MIL Status:
MIL lights up
immediately
Wiring connection of Oxygen Sensor
(O2S) heater -Z29- (B1-S2) faulty, or heater
-Z29- faulty

- Check O2S heater -Z29-(B1-S2) page 24
-55


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
For troubleshooting
Display group 040
Engine Control Module (ECM) -J192-
faulty

- Replace and code engine control module
page 01
-265
erase DTC memory and
test drive check DTC memory
Pa
ge 127 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-96
Notes:

The heating for Oxygen Sensor Probes behind Three Way Catalytic Converter (TWC) is not switched on immediately at
engine start, but when the calculated exhaust gas temperature drops below 308 C (586 F) ( Read measuring value
block, display group 42, channel 1). The malfunction "P1105 / 17513" is set as soon as the probe heater is switched on (the vehicle must be driven approx. 60
sec. under load) and the heating current is greater than 10 A for longer than 80 ms.
Pa
ge 128 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-97

Output on GST and/or
on VAG 1551 scan tool
Possible malfunction cause

Malfunction repair
P1106 / 17514
(B2-S1) Voltage too
Low/Air Leak Harness connector for Heated Oxygen
Sensor (HO2S) 2 -G108- (B2-S1) loose or
corroded due to moisture in the harness
connector

- Check harness connector for tight fit and
contact corrosion, if necessary reconnect
and/or clean, installation location page 24
-1

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
MIL Status:
MIL lights up
immediately Leak in Bank 1 exhaust system up to
Heated Oxygen Sensor (HO2S) 2 -G108-
(B2-S1)

- Find and repair leak

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again

Wiring connection to r Heated Oxygen
Sensor (HO2S) 2 -G108- (B2-S1) or -G108-
(B2-S1) faulty

- Check Heated Oxygen Sensor (HO2S) 2 -
G108- (B2-S1) page 24
-49

For troubleshooting
Display group 010
Malfunction cause found: Yes
No
Continued next page

- Erase DTC memory, test drive and after
test drive, check DTC memory again
Pa
ge 129 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-98


Engine Control Module
(ECM) -J192- faulty

- Replace and code engine control module page 01
-265
erase DTC
memory and test drive check DTC memory
Note:
The malfunction "P1106 / 17514" is set 123 sec after engine start, with a coolant temperature over 30 C (86 F) as soon as
the oxygen sensor control has reached the rich limit for 2 sec more than 20 times (or 40 sec. without interruption).
Pa
ge 130 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1