warning AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst

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Pages: 166, PDF Size: 0.53 MB

Page 2 of 166

AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst 01-2

The Exhaust Malfunction Indicator Light (MIL) in
the instrument cluster will be switched on if the
engine control module recognizes malfunctions
which have an affect (decrease emissions

Page 12 of 166

AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst 01-10

WARNING!

When performing a road test and checks, the
vehicle diagnostic, testing and information
system VAS5051 as well as the VAG1551
may be secured only on rear seat, from
wh

Page 22 of 166

AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst 01-19
Diagnostic Trouble Code (DTC) table

Notes:

If malfunctions occur in the sensors and components being monitored, they will be stored in the DTC memory together
with an indication of the t

01-19
Diagnostic Trouble Code (DTC) table

Notes:

If malfunctions occur in the sensors and components being monitored, they will be stored in the DTC memory together
with an indication of the type of malfunction. Notes on Engine Power Control (EPC) (drive by wire) Page 24
-139
.
Malfunctions relating to the electronic throttle are also indicated by the EPC (Electronic Power Control) warning light in the
instrument cluster.
Malfunction which decrease exhaust emissions are indicated by an Exhaust Malfunction Indicator Light (MIL), the MIL is
located in the instrument cluster. As soon as certain malfunction are recognized, the MIL is switched on immediately.
There are also malfunctions, were the MIL is switched on only after the engine is started again.
Sporadically occurring malfunctions (temporary malfunctions) will be indicated on the VAG1551 display as "SP."
The DTC table is arranged according to the 5-digit DTC in the left-hand column.
If a malfunction is stored in the DTC memory and then does not occur again during the next 40 engine warm-up phases,
the DTC will be automatically erased.
Components that are indicated as being faulty by the VAG1551 should not be replaced immediately. Always start by
checking the wiring, connectors and Ground (GND) connections for the component using the current wiring diagram. This
is particularly important in the case of sporadic malfunctions (indicated by the letters "SP"on the scan tool display).
If the connector for the engine control module is disconnected or if the battery is disconnected, all the learned values
(adaptation values) stored in the control module will be erased, although the contents of the DTC memory will remain
intact. The next time the engine is started the idling may be rough at first. In this case let the engine run at idle for a few
Pa
ge 22 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

Page 89 of 166

AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst 01-73

DTC
Description of malfunction
Corrective action
SAE
VAG

P1650 18058 Powertrain CAN-bus
Missing message from instrument
cluster - Check data transfer Page 24-201
P165

Page 90 of 166

AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst Note:
The malfunction light for power acceleration -K132- is also called the EPC warning lamp.
Pa
ge 90 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/