automatic transmission AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection User Guide

01-166
Test table display group 001 Display
field Display on
VAG 1551 scan
tool Malfunction cause
Malfunction repair
1 Greater than
110
or
Less than 85
Engine Coolant Temperature (ECT)
sensor -G62-
Wiring connection to Engine Control
Module (ECM) -J192-
Coolant thermostat faulty
Repair Manual, 2.8 Liter V6 2V Engine
Mechanical, Engine Code(s): AFC, Repair Group 19
- Check DTC memory page 01
-13
- Check -G62- page 28
-25
- Check engine coolant thermostat
2 Less than 1.450
V
Large intake air leak between intake
manifold and Mass Air Flow (MAF)
sensor Repair cause
Greater than
1.580 V Electrical consumers on, steering wheel
at end stop, driving mode selected
(automatic transmission)
Tolerance for new engines: - Switch consumers off
- Center steering wheel
- Put selector lever in P or N position
display group 004, display field 4
Max. 1.660 V
When engine speed increases, the display
value increases to 2.500 V, falls to 0.000 V
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01-169

Display
field Display on VAG
1551 scan tool Malfunction cause
Malfunction repair
3 Outside tolerance
range
Closed Throttle Position (CTP)
switch activated or faulty CTP switch or throttle position
sensor -G69- incorrectly adjusted Electrical consumers onSteering wheel at end stopDriving mode selected (automatic
transmission) Moisture in connector for -G69-Ground point on intake manifold - Check DTC memory page 01
-13
- Check and adjust -G69- page 24
-77
- Switch electrical consumers off
- Center steering wheel
- Selector lever in P or N display group 004,
display field 4 - Visual inspection
- Check ground connection according to wiring
diagram
4 0 or 1
Closed Throttle Position (CTP)
switch -F60- faulty Throttle position sensor -G69-
incorrectly adjusted Throttle sticks Floor mat presses against
accelerator pedal Moisture in connector of -G69-Accelerator pedal cable adjustment Display group 011, display field 4
Repair Manual, 2.8 Liter V6 2V Engine
Mechanical, Engine Code(s): AFC, Repair Group 20
- Check DTC memory page 01
-13
- Check and adjust -F60- page 24
-73
- Visual inspection
- Adjust accelerator pedal cable:
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01-170
Display group 003 Display shows
Display/specified value
Designation
Basic setting 3
1 2 3 4 650 - 750 RPM 1 = Momentary idle speed
15.0 - 35.0% 2 = Engine load idle1)
0% and/or greater than 95% 3 = Throttle angle - at idle: 0%; at wide open throttle: > 95%
... km/h 4 = Momentary vehicle speed 1) Evaluate engine load tolerance range only at idle during "Basic Setting" function 04.
Note on display field 1:
Idle speed on vehicles without A/C and rear windshield heater switched on: 750-850 RPM.
Notes on display field 3:
For the testing at wide open throttle, stop engine, and switch ignition on.
Since in vehicles with manual transmission and automatic transmission different throttle bodies are installed, the start of
opening of the throttle body can be measured with ignition on and thus incorrect installation can be checked
Manual transmission: 45-53%
Automatic transmission: 27-35%
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01-171
Test table display group 003 Display
field Display on VAG
1551 scan tool Malfunction cause
Malfunction repair
1 Greater than 750
RPM
Closed Throttle Position (CTP)
switch -F60- Large air leak quantity Idle Air Control (IAC) valve -N71-
sticks or is hard to move Rear windshield heater on Display group 04, display field 4
- Check -F60- page 24
-73
- Repair cause
- Check using output diagnostic test mode
page 01
-145

- Switch electrical consumers off
Less than 650 RPM
Idle Air Control (IAC) valve -N71-
sticks or is hard to move Closed Throttle Position (CTP)
switch -F60- Driving mode selected (automatic
transmission) Display group 004, display field 4
- Check using output diagnostic test mode
page 01
-145

- Check -F60- page 24
-73
- Move selector lever to P or N
2 Outside tolerance
range
Poor idle (not running on all
cylinders) Mass Air Flow (MAF) sensor -G70-
faulty Idle Air Control (IAC) valve -N71-
faulty Electrical consumers on- Fuel injectors or spark plugs faulty
- Check DTC memory page 01
-13
and/or
display group 001, display field 2 and 3
- Check DTC memory page 01
-13
and/or
display group 018
- Switch electrical consumers off
- Center steering wheel
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Steering wheel at end stopDriving mode selected (automatic
transmission) - Move selector lever to P or N
Pa
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jection
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01-173
Display group 004 Display
shows Display/specified
value Designation
Basic
setting 4
1 2 3 4 0 2
1 = Idle air control valve at idle
HS: +14 to -16
or
AT: +10 to -20 2 = Idle speed control learning value in manual transmission (HS) at idle setting and/or
with automatic transmission (AT) in selector lever setting P or N
Variation permitted for new engines:
HS: +20 to -16AT: +16 to -20)
HS: 0
or
AT: +10 to -20 3 = Idle speed control learning value in automatic transmission (AT) in selector lever
setting D, 1, 2, 3 or R. (0 is always displayed in vehicles with manual transmission.)
001 10 4 = Shift inputs at idle:
0 off 1 on
Notes:

Values in display fields 2 and/or 3 can only be evaluated with idle air control valve is within tolerance at idle (display value
1). If the idle air control valve is not within tolerance after 1 minute waiting time, no learning takes place in display fields 2
and/or 3 .
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01-174
Test table display group 004 Display
field Display on VAG
1551 scan tool Malfunction cause
Malfunction repair
1 Outside tolerance
range
Malfunction in the DTC memoryClosed Throttle Position (CTP) switch -
F60- activated or faulty Idle Air Control (IAC) valve -N71- faulty Electrical consumers onSteering wheel at end stop Driving mode selected (automatic
transmission) Throttle sticks, floor mat presses on
accelerator pedal, air leak - Check DTC memory page 01
-13
- Check -F60- page 24
-73
and display
group 002, display field 4
- Check -N71- page 24
-37
- Switch electrical consumers off
- Center steering wheel
- Move selector lever to P or N
- Repair cause
Pa
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jection
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01-175

Display
field Display on
VAG 1551 scan
tool Malfunction cause
Malfunction repair
2 Greater than
+14(HS)
and/or
greater than +
10(AT)
Idle Air Control (IAC) valve -N71- faulty
Electrical consumers on
Steering wheel at end stop
Driving mode selected (automatic transmission)
Intake manifold pump plugged in automatic transmission
EGR vacuum regulator solenoid valve -N18- open- Check DTC memory
page 01
-13
and/or display
group 018
- Switch electrical
consumers off
- Center steering wheel
- Move selector lever to P or
N
- Repair cause
- Check DTC memory
and/or display group 017,
display field 3
2 Less than -16
(HS)
and/or
less than -20
(AT)
Idle Air Control (IAC) valve -N71- faulty
Large air leak, manifold area, throttle stop not OK
Air leak on second stage of throttle - Check DTC memory
page 01
-13
and/or display
group 018
- Repair cause
3 Outside
tolerance range Only on vehicles with automatic transmission:

Display field 2 outside tolerance
If display field 2 is within tolerance, move selector lever to D Display field 2
- Check transmission
Pa
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jection
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01-176

Display
field Display on VAG 1551
scan tool Malfunction cause
Malfunction repair
4 Not 001 10
Closed Throttle Position (CTP) switch -F60 activated or faulty A/C compressor switched on Rear window heating switched on Driving mode selected (automatic
transmission) - Check and adjust -F60- page 24
-
73

- Switch A/C off
- Check A/C compressor shut-off
page 24
-90

- Move selector lever to P or N
Note:
Display field 4 (shift inputs) can be used to recognize whether the components described below are recognized by the Engine
Control Module (ECM) as switched on or off. Display group 023 gives an exact description of the shift inputs. 0
0
1

1
0
Meaning of 5-digit shift inputs

1 = Shifting Signal (0 = not active / 1 = active)

2 = Gear recognition signal (always "1" except that display = "0" for automatic transmission vehicles with
gear engaged)

3 = -----------

4 = Mechanical Closed Throttle Position (CTP) switch (1 = closed / 0 = open)

5 = A/C compressor OFF/ON (0 = off, 1 = on)

6 = Rear window heater signal (always "0" except for vehicles without A/C and with rear window heater
on)
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jection
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01-205
Display group 023 Display shows
Display/specified value
Designation
Basic setting 23
1 2 3 4 X 1 = Upshift or downshift signal
XX 2 = Gear recognition signal and shifting signal
XX 3 = A/C compressor off/on and rear window heater signal
X 4 = A/C compressor shut-off Notes on display field 1:

The signal for upshift and downshift will only be output by the Transmission Control Module (TCM) for the automatic
transmission 01V. For vehicles without automatic transmission 01V, a "1" is always displayed.
Check upshift and downshift signal page 24
-103
.
X
Meaning of 1-digit display:

With vehicle not running:
Value "0" = Selector lever in R
Value "1" = Selector lever in 2,3,4,D,P,N

When driving-vehicle speed greater than 14 km/h (9 mph):
Value "0" = Ignition angle retarded for downshift selected
Pa
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(OBD
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port Fuel In
jection
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)
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