fuse AUDI A4 1998 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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port Fuel In
jection
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)
11/22/2002 htt
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play?action=Goto&t
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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:
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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

01-145

Output Diagnostic Test Mode (scan tool
function 03)


Test requirements:

Fuses for engine electronics OK
Fuel Pump (FP) Relay OK
Ground connections OK page 01
-5

Triggering sequence:

Fuel Pump (FP) relay -J17-
Idle Air Control (IAC) valve -N71-
Intake manifold change-over valve -N156-
EVAP canister purge regulator valve -N80-
EGR vacuum regulator solenoid valve -N18-
Secondary Air Injection (AIR) solenoid valve -
N112- (only on vehicles with secondary air
system)
Pa
ge 198 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