1999 AUDI A4 engine

01-153

- Check and erase DTC memory page 01
-
13
.

There must be no malfunctions stored (if
necessary repair malfunction, erase DTC
memory and test drive, switch engine off and
start again, test drive and, as a check, check
DTC memory again).

Note:
The readiness code is erased each time the DTC
memory is erased (either with function 05 or with
Mode 4).

- After checking and erasing DTC memory, let
engine continue to run at idle.
Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
When the HELP button is pressed, an overview of possible functions is
printed out.
- Press buttons -0- and -4- to select "Basic Setting" function 04.
Rapid data transfer
Q
04 - Basic Setting

Indicated on display
- Press Q-button to confirm input.
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yp
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01-156
Display group overview with test table

Note:
Display groups 000 to 010 are used for general troubleshooting.
Display group
Display shows
Designation
000 Basic setting 0
1 2 3 4 5 6 7 8 9 10 Key to displays page 01
-163

001 Basic setting 1
1 2 3 4 1 = Engine coolant temperature
2 = Mass Air Flow (MAF) sensor output voltage
3 = Altitude display (only on vehicles with secondary air system )
4 = Engine Control Module (ECM) voltage supply
002 Basic setting 2
1 2 3 4 1 = Throttle Position (TP) sensor voltage (coarse)
2 = Throttle Position (TP) sensor voltage (fine)
3 = Throttle Position (TP) sensor learning value
4 = Closed Throttle Position (CTP) switch
003 Basic setting 3
1 2 3 4 1 = Engine speed (RPM)
2 = Engine load
3 = Throttle angle
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01-158
Note:
Display groups 11 to 45 are used for troubleshooting when there are driving performance problems, and used to evaluate
components and systems that influence the exhaust. Display group
Display shows
Designation
011 Basic setting 11
1 2 3 4 1 = Ignition timing point w/o knock control, w/o idle speed control
2 = Ignition timing point with knock control and idle speed control
3 = Ignition timing point access to idle speed control
4 = Closed Throttle Position (CTP) switch function
012 Basic setting 12
1 2 3 4 1 = Engine speed
2 = Engine load
3 = Ignition timing point map switching
4 = Ignition timing point retarded by knock control
013 Basic setting 13
1 2 3 4 1 = Ignition timing point map switching
2 = Ignition timing point retarded by knock control (cylinder 1)
3 = Ignition timing point retarded by knock control (cylinder 2)
4 = Ignition timing point retarded by knock control (cylinder 3)
014 Basic setting 14 1 = Ignition timing point map switching
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1 2 3 4 2 = Ignition timing point retarded by knock control (cylinder 4)
3 = Ignition timing point retarded by knock control (cylinder 5)
4 = Ignition timing point retarded by knock control (cylinder 6)
015 Basic setting 15
1 2 3 4 1 = Engine speed (RPM)
2 = Knock sensor signal (cylinder 1)
3 = Knock sensor signal (cylinder 2)
4 = Knock sensor signal (cylinder 3)
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jection
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)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU01.01.1

01-159

Display group
Display shows
Designation
016 Basic setting 16
1 2 3 4 1 = Engine speed (RPM)
2 = Knock sensor signal (cylinder 4)
3 = Knock sensor signal (cylinder 5)
4 = Knock sensor signal (cylinder 6)
017
(vehicles with
EGR) Basic setting 17
1 2 3 4 1 = Timer 1
2 = Timer 2
3 = Engine load
4 = Exhaust gas recirculation temperature
018 Basic setting 18
1 2 3 4 1 = Specified internal duty cycle of Idle Air Control (IAC) valve -N71-
2 = Current draw by Idle Air Control (IAC) valve -N71-
3 = Power control from Idle Air Control (IAC) valve -N71-
4 = Engine Control Module (ECM) voltage supply
019 Basic setting 19
1 2 3 4 1 = Engine power
2 = Intake air volume
3 = Vehicle speed
4 = Fuel injection time
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01-162

099 Basic setting 99
1 2 3 4 1 = Momentary engine speed
2 = Momentary engine load
3 = Coolant temperature
4 = Oxygen sensor control OFF/ON Note:
Display group 99 can switch the oxygen sensor control on or off.
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01-163
Display group 000
Note:
If the values displayed do not correspond to the specified values, the following display groups 001 to 010 can be used to
repair malfunctions. Display
field Specified
display value Corresponds to
physical values Designation and conversion to physical values
1 135 - 160
85 - 110 C
Momentary coolant temperature, display -50 = ___ C
2 145 - 158 1.45 - 1.58 V Mass Air Flow (MAF) sensor output voltage, display: 100 = 1 V
3 26-30 650-750 RPM Momentary engine speed, display X 25 = ____RPM
4 0 - 14
or
255 - 240 Idle speed control learning value, with manual transmission in idle
position and/or with automatic transmission with selector lever setting
P or N (average = 0)
5 0 -10
or
255 - 236 Idle speed control learning value, with automatic transmission in
selector lever setting D 1, 2, 3 or R (average = 0)
(On manual transmission vehicles, 0 is always displayed.)
6 126 - 130 Idle speed control feedback (average 128)
7 20 Shift inputs
8 120-136 Oxygen sensor control (average 128/cylinders 1 to 3) "0" is always
displayed on engines without oxygen sensor probe.
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01-165
Display group 001 Display shows
Display/specified value
Designation
Basic setting 1
1 2 3 4 85-110 C
1 = Coolant temperature
1.450-1.580 V2) 2 = Mass Air Flow (MAF) sensor1) output voltage
0 - 255 3 = Altitude display
12.000 - 14.000 V 4 = Engine Control Module (ECM) voltage supply battery voltage
1) specified value minus 0.01 V per 500 m above sea level. 2) Mass Air Flow (MAF) sensor output voltage tolerance range can only be evaluated during basic setting at idle.
Note on display field 3:
The altitude display is a calculated value inside the engine control module that is calculated by a comparison of the intake air
mass and the throttle angle.
Pa
ge 230 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