check engine AUDI A4 1995 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Manual PDF

01-115


Camshaft Position (CMP) sensor -G40- oily or dirty
on the inside because of leaking seal on the cylinder
head.

- Camshaft Position (CMP) sensor -G40- and check for
contamination. If it is oily, replace seal on cylinder head

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
Notes:

The malfunction "P1340 / 17748" is set as soon as the crankshaft position sensor signal is always "high" at an engine
speed between 50 RPM and 4000 RPM and with more than 20 crankshaft sensor signals recognized.
Pa
ge 156 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

No
drive, check DTC memory again

Wiring connection to ignition coil power
output stage -N122- faulty or power output
stage -N122- faulty

- Check Power output stage -N122- for
ignition coils page 28
-13


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 power output stage is not integrated in the Engine Control Module (ECM) -J192-, it is a separate component.
Pa
ge 158 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

01-118


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 "P1391 / 17799" is set as soon as the crankshaft position sensor signal is always "low" at an engine speed
between 50 RPM and 400 RPM and with more than 3 crankshaft sensor signals recognized.
Pa
ge 160 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

01-120


Camshaft Position (CMP) sensor -G40- oily or
dirty on the inside because of leaky seal on cylinder
head

- Remove Camshaft Position (CMP) sensor -G40- and
check for contamination. If it is oily, replace seal on cylinder
head

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

check DTC memory and test drive check DTC
memory
Notes:

The malfunction "P1392 / 17800"is set as soon as the crankshaft position sensor signal is always "high" at an engine
speed between 50 RPM and 4000 RPM and with more than 20 crankshaft sensor signals recognized.
Pa
ge 162 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

No
test drive, check DTC memory again

Wiring connection to Power output stage -
N122- for ignition coils or -N122- faulty

- Check Power output stage -N122- for
ignition coils page 28
-13


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
check DTC memory and
test drive check DTC memory
Note:
The power output stage is not integrated in the Engine Control Module (ECM) -J192-, it is a separate component.
Pa
ge 164 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

01-122

Output on GST and/or on
VAG 1551 scan tool Possible malfunction
cause
Malfunction repair
P1396 / 17804
Engine Speed Sensor
Missing Tooth Starter ring gear
damaged (teeth broken off)


- Remove starter and carry out visual inspection of the
starter ring gear. If broken teeth are found, replace
starter ring gear
MIL Status:
MIL lights up immediately Malfunction cause found:
Yes


- Erase DTC memory, test drive and after test drive,
check DTC memory again
For troubleshooting
Display group 037

Note:
The malfunction "P1396 / 17804" is set when the engine speed sensor does not supply 270 engine speed pulses per engine
revolution.
Pa
ge 165 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

01-123

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

Malfunction repair
P1400 / 17808
EGR Valve Circ.
Electrical Malfunction Harness connector for EGR vacuum
regulator solenoid valve -N18- 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 EGR vacuum
regulator solenoid valve -N18- faulty or valve
-N18- faulty

- EGR vacuum regulator solenoid valve -
N18- page 24
-67


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
Note:
The malfunction "P1400 / 17808" is set after engine start at an engine speed less than 900 RPM, an engine load less than
25% and EGR valve duty cycle less than 20%, as soon as the control module output of the EGR valve is "low" for longer than
1.2 sec.
Pa
ge 166 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

01-124

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

Malfunction repair
P1402 / 17810
EGR Valve Circ.
Short to B+ Harness connector for EGR vacuum
regulator solenoid valve -N18- 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 EGR vacuum
regulator solenoid valve -N18- faulty, or valve
-N18- faulty

- EGR vacuum regulator solenoid valve -
N18- page 24
-67


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, test
drive and check DTC memory
Notes:
The malfunction "P1402 / 17810" is set after engine start at an engine speed between 1000 RPM and 3500 RPM, an engine
load between 33% and 66% and an EGR valve duty cycle greater than 30%, as soon as the control module output of the EGR
valve is "high" for longer than 1.2 sec.
Pa
ge 167 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

01-125

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

Malfunction repair
P1407 / 17815
EGR Temp.Sensor
Signal too Low Harness connector for EGR
temperature sensor -G98- 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 EGR temperature
sensor -G98- faulty or sensor -G98- faulty

- Check EGR temperature sensor -G98-
page 24
-71


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after test
drive, check DTC memory again
For troubleshooting
Display group 017
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 "P1407 / 17815" is set after a cold start (coolant starting temperature less than 30 C (86 F) as soon as an
EGR temperature signal is received that lies over 200 C (392 F)
Pa
ge 168 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

01-126

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

Malfunction repair
P1408 / 17816
EGR Temp.Sensor
Signal too High Harness connector for EGR
temperature sensor -G98- 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 EGR temperature
sensor -G98- faulty or sensor -G98- faulty

- Check EGR temperature sensor -G98-
page 24
-71


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and after test
drive, check DTC memory again
For troubleshooting
Display group 017
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 "P1408 / 17816" is set with open idle switch, a coolant temperature greater than 72 C (162 F), a throttle
angle less than 42.5 , a vehicle speed between 70 km/h and 105 km/h (44 and 66 mph), an EGR valve duty cycle greater
Pa
ge 169 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