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

01-7

VAG 1551/1552 Scan Tool (ST),
connecting and selecting Engine
Electronics address word 01


Fuses for engine electronics OK
Fuel pump relay OK
Ground connections OK page 01
-5

Connecting-m.y. 1996
- Open back seat ash tray (center console) and remove cover for data
link connector.

- Connect VAG 1551/1552 scan tool with adapter cable VAG 1551/3 to
data link connector.
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01-24

Diagnostic Trouble Code
(DTC) Malfunction text
MIL switching
condition
SAE
VAG
P1396 17804 Engine Speed Sensor Missing Tooth immediately
P1400 17808 EGR Valve Circ. Electrical Malfunction immediately
P1402 17810 EGR Valve Circ. Short to B+ immediately
P1407 17815 EGR Temp.Sensor Signal too Low immediately
P1408 17816 EGR Temp.Sensor Signal too High immediately
P1409 17817 Tank Ventilation Valve Electrical Malfunction immediately
P1410 17818 Tank Ventilation Valve Short to B+ immediately
P1500 17908 Fuel Pump Relay Circ. Electrical Malfunction immediately
P1504 17912 Intake Air Sys.Bypass Air Determined immediately
P1505 17913 CTP Switch does not Close Open Circuit immediately
P1506 17914 CTP Switch does not Open Short to Ground immediately
P1509 17917 IAC Circ. Electrical Malfunction immediately
P1510 17918 IAC Circ. Short to B+ immediately
P1511 17919 Intake Manifold Changeover Valve Circ. Electrical
Malfunction off
P1512 17920 Intake Manifold Changeover Valve Circ. Short to B+ off
Pa
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jection
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If faulty components are found, also check wiring to the components according to wiring diagram for short and open
circuit.
Before repairing or replacing components, check ground connections for Engine Control Module (ECM) -J192- connector
D on terminals 3, 7 and 12 and connector E on terminals 3, 7 and 11 (specified value approx. 0.5 ) and ground points on
the engine for corrosion and damage, check fuel pump relay Repair Group 24.
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jection
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01-40

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

Malfunction repair
P0135 / 16519
O2 Sensor Heater Circuit
Malfunction (Bank 1
Sensor 1) 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 check
DTC memory again
MIL Status:
MIL lights up immediately
Wiring connection for 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 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 O2S in front of the Three Way Catalytic Converter (TWC) are switched on by the fuel pump relay.
Pa
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port Fuel In
jection
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)
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play?action=Goto&t
yp
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pair&id=AUDI.B5.FU01.01.1

01-48

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

Malfunction repair
P0155 / 16539
O2 Sensor Heater Circuit
Malfunction (Bank 2
Sensor 1) Harness connector for Oxygen Sensor
(O2S) heater -Z28- (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 check
DTC memory again
MIL Status:
MIL lights up immediately
Wiring connection for Oxygen Sensor
(O2S) heater -Z28- (B2-S1) faulty, or heater
-Z28- faulty

- Check O2S heater -Z28- (B2-S1) page 24
-51


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and 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 heater for the O2S in front of the Three Way Catalytic Converter (TWC) is switched on by the fuel pump relay.
Pa
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(OBD
) - Multi
port Fuel In
jection
(MFI
)
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play?action=Goto&t
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pair&id=AUDI.B5.FU01.01.1

01-61


Fuel system pressure too low because of:
- Leaks in the area of the fuel lines or the fuel distributor strip
- Vacuum line to the fuel pressure regulator or fuel pressure
regulator faulty
- Fuel filter plugged
- Fuel pump delivery quantity too low

- Check system pressure and residual pressure
page 24
-20


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and check DTC
memory

EVAP canister purge regulator valve -N80- sticks
mechanically in closed position

- Check EVAP canister purge regulator valve -
N80- page 24
-58


Malfunction cause found: Yes


- Erase DTC memory, test drive and check DTC
memory
Notes:
If the malfunctions "P0171 / 16 555 and P0174 / 16558"are set, is set, the oxygen sensor control has exceeded the learning
value limit in the "rich" direction, but the (HO2S) still recognizes "mixture too lean".
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jection
(MFI
)
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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
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(OBD
) - Multi
port Fuel In
jection
(MFI
)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-99

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

Malfunction repair
P1107 / 17515
Heating Circ. (B2-S1)
Short to B+ Harness connector for Oxygen Sensor
(O2S) heater -Z28- (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 Wiring connection of Oxygen Sensor
(O2S) heater -Z28- (B2-S1) faulty, or heater
-Z28- faulty

- Check O2S heater -Z28- (B2-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 131 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

01-103

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

Malfunction repair
P1201 / 17609
Cyl.1-Fuel Injector Circ.
Electrical Malfunction
-----------------------
P1202 / 17610
Cyl.2-Fuel Injector Circ.
Electrical Malfunction
_______________________
P1203 / 17611
Cyl.3-Fuel Injector Circ.
Electrical Malfunction
_______________________ Are all 6 fuel injectors stored in the DTC
memory with the malfunction type "Cyl. X
Electrical circuit electrical malfunction" and
malfunction P1500 / 17908
"Fuel pump relay Electrical circuit electrical
malfunction"?
No
Yes

- Check Fuel pump relay and
control page 24
-24


Malfunction cause found: Yes
No

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

Wiring connection to Cylinder 1, 2, or 3

- Check fuel injectors page 24
-
Pa
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) - Multi
port Fuel In
jection
(MFI
)
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01-105

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

Malfunction repair
P1204 / 17612
Cyl.4-Fuel Injector Circ
Electrical Malfunction
-----------------------
P1205 / 17613
Cyl. 5-Fuel Injector Circ
Electrical Malfunction
_______________________
P1206 / 17614
Cyl. 6-Fuel Injector Circ
Electrical Malfunction
_______________________ Are all 6 fuel injectors stored in DTC memory
with the malfunction "Cyl. X-Fuel Injector Circ
Electrical Malfunction" and with DTC P1500 /
17908 "Fuel Pump Relay Circ Electrical
Malfunction"?
No
Yes

- Check fuel pump relay and
control page 24
-24


Malfunction cause found: Yes
No

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

Wiring connection to Cylinder 4, 5, or 6 fuel

- Check fuel injectors page
Pa
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gnostic
(OBD
) - Multi
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jection
(MFI
)
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yp
e=re
pair&id=AUDI.B5.FU01.01.1