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

01-81

Activating Wastegate Bypass Regulator Valve
-N75-

-
Press button.Output Diagnostic Test Mode Wastegate bypass regulator valve -N75

Indicated on display
This solenoid valve is activated for 1 minute (clicks), unless button is
pressed first to switch to the next actuator.
If valve is not activated (does not click):
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 21, Turbocharger, Checking Wastgate Bypass Regulator Valve
-N75

Actuating camshaft adjustment valves -N205-, -N208-
-
Press button.
Output Diagnostic Test Mode Camshaft Ad
justment

Indicated on display
If camshaft adjustment valve 1 or 2 is not activated:
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 15, Camshaft adjustment, checking camshaft adjustment valves
- Camshaft adjustment valves 1 and 2 (-N205 and -N208) will continue
to be activated (or will click) for about 1 minute.
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01-83

Activating Recirculating valve for
turbocharger -N249

-
Press button.Output Diagnostic Test Mode Recirculating valve for turbocharg -N249

Indicated on display
This solenoid valve is activated for 1 minute (clicks), unless button is
pressed first to switch to the next actuator.
If valve is not activated (does not click):
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 21, Turbocharger, Checking Recirculating valve for turbocharger
-N249

Actuating fuel injectors
Note:
The fuel injectors are activated in firing order that means Cyl.1, Cyl.4,
Cyl.3, Cyl.6, Cyl.2, Cyl,5
-
Press button.
Output Diagnostic Test Mode Cylinder 1 fuel injectors -N30

Indicated on display
After pressing button, fuel injector must click five times. -
Press button.
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01-89

Test requirements for operations with engine
running

No DTCs stored in DTC memory
Coolant temperature at least 85 C

Electrical consumers switched off (radiator
fan must not run during test)
A/C switched off

- Connect vehicle diagnostic, testing and
information system VAS 5051 or VAG1551 scan
tool and select engine electronics control
module by entering address word "01" Page 01
-9 . When doing this the engine must be
idling.

- Check and erase DTC memory Page 01
-15
.
There should be no malfunctions stored in the
DTC memory. (If necessary repair malfunctions,
erase DTC memory and switch off engine. Start
engine again, road test the vehicle and check
DTC memory again to check).

- Continue to run engine at idle.
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01-97

Read Measuring Value Block


Test requirements

Coolant temperature at least 80 C

Electrical consumers switched off (radiator
fan must not run during the check)
A/C switched off

- Connect vehicle diagnostic, testing and
information system VAS 5051 or VAG1551 scan
tool and select engine electronics control
module by entering address word "01" Page 01
-9 . When doing this the engine must be
idling.
Rapid data transfer
HELP
Select function XX

Indicated on display:
- Press buttons -0- and -8- to select function "Read Measuring Value
Block" and confirm entry with -Q- button.
Read Measuring Value Block Input displa
y group number XXX

Indicated on display
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01-101

Readiness code, checking


Test sequence

- Connect vehicle diagnostic, testing and
information system VAS5051 or VAG1551 scan
tool to vehicle and select Control module for
engine electronics "Address Word" 01 Page
01
-9 . The ignition must be switched on.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block" and
press -Q- button to confirm input.
Read Measurin
g Value Block
Q
Input displa
y group number XXX

When indicated on display
- Press buttons "086" for "display group number 086" and press -Q-
button to confirm input.
Read Measuring Value Block 86
1
2
3
4

When indicated on display
- Check readiness code in display field 1

Specified value: 0 0 0 0 0 0 0 0
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01-106

Work step 1: Check DTC memory

- Connect Vehicle Diagnostic, Test and
Information system VAS5051 or VAG1551 scan
tool to vehicle and select control module for
engine electronics using "address word" 01
Page 01
-9 . The ignition is switched on.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons -0- and -2- to select function "Check DTC Memory" and
press -Q- button to confirm input.
X DTC reco
gnized!

Number of stored DTCs or "No DTC recognized" will be indicated on
display.
If a DTC is stored:
If no DTC is stored: - Repair malfunction, erase DTC memory. Road test vehicle and then re-
check DTC memory as a control measure.
-
Press button.
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01-108

Work step 3: Adaptation Throttle Valve
Control Module to Engine Control Module
(ECM)

Test requirements

Ignition switched on.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons "04" for the function "Basic Setting" and press Q button
to confirm input.
System in Basic Settin
g
Q
Input displa
y group number XXX

When indicated on display
- Input "060" for "display group number 60" and press Q button to
confirm input.
System in Basic Setting 60
1
2
3
4

When indicated on display
- Check readiness code in display field 3 and 4:
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1
2
3
4
Note:
If test is not initiated or the display jumps from "Test ON" to "Test OFF"
slightly accelerate engine briefly, test will be repeated. - Check specified value in display field 4:
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01-115
If specified value in display field "System OK" is
reached:

- Press -C- button.

Work step 6: Diagnosis of fuel supply system

Test requirements

Engine at idle
Oxygen sensor control active
System in Basic S
ystem
Q
Input display group number XXX

When indicated on display
- Press buttons -1-, -0- and -7- to select display group number 107 and
confirm with -Q- button.
System in Basic Setting 107
1
2
3
4

When indicated on display
Note:
If display "Test ON" does not appear in the display field, switch the engine
off and restart afterward and repeat work step 6. (Diagnostic of fuel supply
system)
After the engine has been started it might be necessary to select "Address
word 01" and initiate the function "04 Basic Setting" again. - Check specified values in display field 4.
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01-116


Display fields

1 2 3 4
Display group 107: Diagnostic of fuel supply
Display xxx /RPM x.x % x.x %
Test ON
Indicated Engine speed
(actual) Oxygen sensor control
average value (Bank 1) Oxygen sensor control
average value (Bank 2) Diagnostic condition
Work
range min.: 750 /RPM
max.:
6800 /RPM min.: -25.0 %
max.: 25.0 % min.: -25.0 %
max.: 25.0 % Test OFF
Test ON
Syst. OK
Syst. n OK
Value 750 - 850/RPM -18.0 % to 12.0 % -18.0 % to 12.0 % Syst. OK
Note

If "Syst. n OK" appears, check
DTC memory Page 01
-15
.
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