1997 AUDI A4 APB Engine Motronic Syst

01-14
If the coding differs from the vehicle version,
then:

- Check coding of engine control module Page
01
-93
, Coding engine control module.

-
Press button.Rapid data transfer
HELP
Select function XX

Indicated on display:
Note:
After pressing the HELP button, an overview of the possible functions is
printed out.
Pa
ge 17 of 166 Motronic s
ystem, On Board Dia
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)
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01-15

Diagnostic Trouble Code (DTC) Memory,
checking and erasing


- Connect vehicle diagnostic, testing and
information system VAS5051 or VAG1551 scan
tool and select "Engine Electronics" by entering
address word 01 Page 01
-9. When doing this
the engine must be idling.
Only if engine does not start:

- Check engine with ignition switched on.

- Switch on printer with PRINT button (indicator
light in button lights up). Rapid data transfer
HELP
Select function XX

Indicated on display
- Operate scan tool according to information on display:
- Press buttons -0- and -2- to select function "Check DTC Memory" and
confirm entry with -Q- button.
Pa
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)
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01-16

No DTC reco
gnized

Indicated on display
or -
Press button.
X DTC reco
gnized

Indicated on display
The stored malfunctions will be displayed and printed out in sequence.
Note: - Locate and eliminate printed out malfunctions according to DTC table
Page 01
-19
.
If no malfunction is stored in the DTC memory, do not erase memory,
otherwise readiness code must be generated. If the DTC memory was erased, generate readiness code Page 01
-
105
.
Pa
ge 19 of 166 Motronic s
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)
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01-17

-
Press button.Rapid data transfer
HELP
Select function XX

Indicated on display:
Notes: - Press buttons -0- and -5- to select function "DTC Memory" and confirm
entry with -Q- button.
Attention!DTC memor
y was not checked

Indicated on display:
Test sequence has not been followed.
- Check DTC memory.
Under the following conditions the DTC memory will not be erased:
If Ignition was switched off after DTC memory has been checked.A static malfunction has not been eliminated.
Pa
ge 20 of 166 Motronic s
ystem, On Board Dia
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)
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01-18

Rapid data transfer DTC Memor
y is erased!

Indicated on display:
Note:
During testing and repair work, malfunctions can be recognized from other
control modules (e.g. disconnected harness connectors). Therefore on
completion, the DTC memories of all control modules must be checked
and erased.
End output -
Press button.- After repairs, check DTC memory again.
Rapid data transfer
HELP
Select function XX

Indicated on display:
- Press buttons -0- and -6- to select function "End Output" and confirm
entry with -Q- button.
Rapid data transfer
HELP
Insert address word XX

Indicated on display:
- Switch ignition off and disconnect diagnostic connector.
Pa
ge 21 of 166 Motronic s
ystem, On Board Dia
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)
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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
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minutes until the adaptation is fully carried out.
After erasing the DTC memory Page 01
-15
, generate readiness code Page 01
-105
.
Pa
ge 23 of 166 Motronic s
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)
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01-20

DTC
Description of malfunction
Corrective action
SAE
VAG


P0101 16485 Mass Air Flow (MAF) sensor -
G70-
Implausible signal - Check Mass Air Flow (MAF) sensor Page 24
-59
P0102 16486 Mass or Volume Air Flow
Circuit
Low input
2) - Check Mass Air Flow (MAF) sensor -G70 Page 24
-59
P0103 16487 Mass or Volume Air Flow
Circuit
High Input
2)

P0106 16490 Manifold Abs.Pressure or
Bar. Pressure
Range/Performance
2) 4)
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Repair
Group 21; Turbocharger; Checking Charge Air Pressure Sensor -G31
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 .
4) Absolute manifold pressure will be determined by the Charge Air Pressure Sensor -G31 (instead of displayed -G71), the air
pressure is determined by the Barometric Pressure (BARO) Sensor -F96 (in Engine Control Module (ECM))
Pa
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e=re
pair&id=AUDI.B5.FU04.01.1