technical AUDI A4 1997 B5 / 1.G APB Engine Motronic Syst

01-1


Motronic system, On Board
Diagnostic (OBD)

On Board Diagnostic, technical data


Equipment
The advantages of OBD can only be fully
exploited by using the vehicle diagnostic, testing
and information system VAS5051 or the
VAG1551 scan tool, in operating mode 1 "Rapid
data transfer."
The DTC memory is equipped with a permanent
memory and therefore does not depend on the
power supply.
The stored malfunctions will be displayed after
checking the DTC memory Page 01
-15
.
After eliminating malfunctions the DTC memory
must be erased Page 01
-15
.

Important note:

Every time the DTC memory is erased and the
voltage supply to the Motronic Engine Control
Module (ECM) -J220 has been interrupted the
readiness code must be generated Page 01
-
105
.
Pa
ge 1 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

01-27

DTC
Description of malfunction
Corrective action
SAE
VAG


P0300 16684 Random/Multiple Cylinder
Misfire Detected
2) - Check cause for misfire Page 28
-52
P0301 16685
Cyl.1 Misfire Detected
2)
- Check fuel tank level
P0302 16686
Cyl.2 Misfire Detected 2)

P0303 16687
Cyl.3 Misfire Detected 2)

P0304 16688
Cyl.4 Misfire Detected 2)

P0305 16689
Cyl.5 Misfire Detected 2)

P0306 16690
Cyl.6 Misfire Detected 2)

2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
The Malfunction Indicator Light (MIL) will blink if the Engine Control Module (ECM) recognizes misfire that could damage the
catalytic converters.
Notes:

On malfunction which could be caused by lack of fuel (e.g.: misfire) the malfunction P1250 "Fuel level too low" will be
displayed in addition. That means, the misfiring was detected due to lack of fuel in the tank and not due to a technical
malfunction.
Pa
ge 31 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