wiring AUDI A4 1998 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Repair Manual

01-127

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

Malfunction repair
P1409 / 17817
Tank Ventilation Valve
Electrical Malfunction Harness connector on Evaporative Emission
(EVAP) canister purge regulator valve -N80-
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 to Evaporative Emission
(EVAP) canister purge regulator valve -N80-
faulty or valve -N80- faulty

- Check Evaporative Emission (EVAP)
canister purge regulator valve -N80-
page 24
-58


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
For troubleshooting
Display group 009
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 "P1409 / 17817" is set after engine start at an engine speed less than 1100 RPM, engine load less than 33%
Pa
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01-128

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

Malfunction repair
P1410 / 17818
Tank Ventilation Valve
Short to B+ Harness connector on Evaporative Emission
(EVAP) canister purge regulator valve -N80-
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 to Evaporative Emission
(EVAP) canister purge regulator valve -N80-
faulty or valve -N80- faulty

- Check Evaporative Emission (EVAP)
canister purge regulator valve -N80-
page 24
-58


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
For troubleshooting
Display group 009
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 "P1410 / 17818" is set after engine start at an engine speed greater than 1250 RPM, an engine load greater
Pa
ge 173 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-129

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

Malfunction repair
P1500 / 17908
Fuel Pump Relay Circ.
Electrical Malfunction Wiring connection to Fuel Pump
(FP) relay -J17- faulty, or relay -J17-
faulty

- Check Intake manifold change-over valve -N156-
and control page 24
-64


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after test
drive, check DTC memory again
MIL Status:
MIL lights up immediately 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 "P1500 / 17908" is only stored as soon as the malfunctions "P1201 /17609", "P1202 / 17610", "P1203 /
17611", "P1204 / 17612", "P1205 / 17613", "P1206 / 17614" are stored simultaneously.
Pa
ge 175 of 366 On Board Dia
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) - Multi
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jection
(MFI
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-134

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

Malfunction repair
P1509 / 17917
IAC Circ.
Electrical Malfunction Harness connector on Idle Air Control
(IAC) valve -N71- 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 to Idle Air Control
(IAC) valve -N71- faulty or valve -N71-
faulty

- Check Idle Air Control (IAC) valve -N71-
page 24
-37


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after test
drive, check DTC memory again
For troubleshooting
Display group 018
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:
If a malfunction is recognized in the electrical circuit, both power output stages ("+" and "-" output) are switched off. The Idle
Air Control (IAC) -N71- has no power and opens the limp home cross section.
Pa
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(OBD
) - Multi
port Fuel In
jection
(MFI
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-135

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

Malfunction repair
P1510 / 17918
IAC Circ.
Short to B+ Harness connector for Idle Air Control
(IAC) valve -N71- 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 to Idle Air Control
(IAC) valve -N71- faulty or valve -N71-
faulty

- Check Idle Air Control (IAC) valve -N71-
page 24
-37


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after
test drive, check DTC memory again
For troubleshooting
Display group 018
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:
If a malfunction is recognized in the electrical circuit, both power output stages ("+" and "-" output) are switched off. The idle
stabilizer valve -N71- has no power and opens the limp home cross section.
Pa
ge 183 of 366 On Board Dia
gnostic
(OBD
) - Multi
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jection
(MFI
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-136

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

Malfunction repair
P1511 / 17919
Intake Manifold
Changeover Valve
Circ.
Electrical Malfunction Harness connector on Intake manifold
change-over valve -N156- 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:
Malfunction not
displayed by MIL Wiring connection to Intake manifold
change-over valve -N156- faulty or valve -
N156- faulty

- Check Intake manifold change-over valve -
N156- page 24
-64


Malfunction cause found: Yes
No

- 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
Pa
ge 184 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

01-137

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

Malfunction repair
P1512 / 17920
Intake Manifold
Changeover Valve
Circ.
Short to B+ Harness connector on valve for Intake
manifold change-over valve -N156- 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:
Malfunction not
displayed by the MIL Wiring connection to Intake manifold
change-over valve -N156- faulty or valve -
N156- faulty

- Check Intake manifold change-over valve -
N156- page 24
-64


Malfunction cause found: Yes
No

- 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
Pa
ge 185 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-140

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

Malfunction repair
P1602 / 18010
Power Supply (B+)
Terminal 30
Low Voltage The malfunction is set when the
battery/control module is disconnected
with ignition on or with a starting attempt
with ignition/control module
disconnected

- The malfunction is erased after the second engine
start if there is sufficient supply voltage. Therefore,
start car after battery/control module is
disconnected; shut off and start car again, then
check DTC memory again.

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after test drive,
check DTC memory again
MIL Status:
MIL lights up
immediately Poor ground connection between
battery and body

- Check ground cable for good contact on battery
terminal and check the threaded connection on the
body

Malfunction cause found: Yes
No

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

Break in the wiring connection
between battery and Engine Control
Module (ECM) -J192-

- Check voltage supply of engine control module
page 28
-27


Malfunction cause found: Yes

- Erase DTC memory, test drive and after test drive,
Pa
ge 189 of 366 On Board Dia
gnostic
(OBD
) - Multi
port Fuel In
jection
(MFI
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-141

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

Malfunction repair
P1606 / 18014
Rough
Road/Acceleration
Sensor
Electrical Malfunction Was an exhaust test carried out in
which only the front axle was moved
and the rear axle was stationary?

- These conditions cause a malfunction to be
stored in the DTC memory. During exhaust tests,
the fuse must be removed from the ABS control
module. After the exhaust test, ABS control module
and engine control module DTC memory must be
erased.

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after test
drive, check DTC memory again
MIL Status:
Malfunction not
displayed by MIL If there are ABS system
malfunctions, the malfunctions P1606 /
18014 are also stored in the engine
control module. Is a malfunction stored
in the ABS control module?

Repair Manual, Brake System On Board
Diagnostic (OBD), Repair Group 01, On Board Diagnostic (OBD)
- Check DTC memory of ABS control module

Malfunction cause found: Yes
No

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

Wiring connection between Engine
Control Module (ECM) -J192- and
ABS control module -J104- faulty

- Check signal for rough road recognition from ABS
control module for ABS/EDL and/or ABS/ASR
page 24
-109

Notes:
Pa
ge 191 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

01-142

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

Malfunction repair
P1611 / 18019
MIL Call-up Circ./
Transm.Control Module
Short to Ground Wiring connection between Engine
Control Module (ECM) -J192- and
Transmission Control Module (TCM) -J217-
faulty

- Check MIL wiring from Transmission
Control Module (TCM) -J217- page 24
-
105


Malfunction cause found: Yes
No

- Erase DTC memory, test drive, after test
drive check DTC memory again
MIL Status:
MIL lights up
immediately Transmission Control Module (TCM) -
J217- faulty

Repair Manual, 5 Spd. Automatic
Transmission 01V On Board Diagnostic (OBD), Repair Group 01
- Replace Transmission Control Module
(TCM) -J217-

Malfunction cause found: Yes
No

- Erase DTC memory, test drive, after test
drive check DTC memory again
For troubleshooting
Display group 027
Engine Control Module (ECM) -J192-
faulty

- Replace and code ECM -J192- page 01
-265
erase DTC memory and take
test drive check DTC memory
Notes:
Pa
ge 193 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