display AUDI A4 2000 B5 / 1.G APB Engine Ignition System Checking
[x] Cancel search | Manufacturer: AUDI, Model Year: 2000, Model line: A4, Model: AUDI A4 2000 B5 / 1.GPages: 64, PDF Size: 0.37 MB
Page 19 of 64
28-17
Intake Air Temperature (IAT) sensor -
G42, checking
Location of sensor and connector Page 24
-5 .
- 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 ignition must be
switched on.
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 Measurin
g Value Block
HELP
Input Displa
y Group Number XXX
Indicated on display
- Press buttons -0-, -0- and -4- to select Display Group 4 and confirm
entry with -Q- button.
Read Measuring Value Block 4
1
2
3
4
Indicated on display: (1...4 display fields) - Check display value for intake air temperature sensor (display field 4):
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Page 20 of 64
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Display fields
1 2 3 4
Display Group 004: Intake air temperature with engine idling
Display xxxx rpm xx.xxx V
xxx.x C
xxx.x C
Indicates Engine speed Battery voltage Coolant temperature
Intake air temperature
Work range min.: 750 RPM
max.: 6800 RPM min.:10.000 V
max.: 15.000 V min.: -48.0 C
max.: 143.0 C
min.: -48.0 C
max.: 143.0 C
Specified value xxxx RPM 12.000...15.000 V
80.0...110.0 C
Between ambient temp. and 120 C
1)
1) If there is a large difference between the temperature displayed and the ambient temperature at the sensor, check the
sensor and sensor wiring for contact resistance and open circuit.
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Page 29 of 64
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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
- Press buttons -0-, -0- and -4- to select Display Group 4 and confirm
entry with -Q- button.
Read Measuring Value Block 4
1
2
3
4
Indicated on display
- Check readout for coolant temperature sender in display field 3.
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Page 30 of 64
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Display fields
1 2 3 4
Display Group 004: Coolant temperature with engine idle
Display xxxx RPM xx.xxx V
xxx.x C
xxx.x C
Indicates Engine speed RPM Battery voltage
Coolant temperature Intake air temperature
Specified value XXXX RPM 12.000...14.500 V
Temperature must increase evenly Ambient temperature
until 120 C
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Page 31 of 64
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If display field 3 does not display a realistic
value:
- Disconnect harness connector from coolant
temperature sensor.
Coolant temperature sensor with square
connector:
- Connect multi-meter (resistance measurement) between terminals 1
and 3 of sensor.
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Page 39 of 64
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Measuring value blocks for ignition timing angle retard Display Group 20 -Ignition- Knock control
Driving mode
Read measuring value block 20
Indicated on display
xx.x KW
xx.x KW
xx.x KW
xx.x KW
1 2
3 4
Display fields
Specified value
Evaluation
Ignition timing retard via knock control:
cylinder 4 0...12 KW
(crankshaft
angle)
Page 28
-40
Ignition timing retard via knock control:
cylinder 3
0...12 KW
(crankshaft
angle)
Page 28
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Ignition timing retard via knock control: cylinder 2
0...12 KW
(crankshaft
angle)
Page 28
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Ignition timing retard via knock control: cylinder 1
0...12 KW
(crankshaft
angle)
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Note:
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Page 40 of 64
The displayed digit values in display fields 1 to 4 reflects the actual "ignition timing retard" via knock control from the individual
cylinders. The ignition timing retard occurs via KW (crankshaft angle).
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Page 41 of 64
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Display Group 21 -Ignition- Knock control
Driving mode
Read measuring value block 21
Indicated on display
xx.x KW
xx.x KW
1 2
3 4
Display fields
Specified value
Evaluation
Ignition timing retard via knock control: cylinder 6
0...12 KW
(crankshaft angle)
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Ignition timing retard via knock control: cylinder 5
0...12 KW
(crankshaft angle)
Page 28
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Note:
The displayed digit values in display fields 1 and 2 reflects the actual "ignition timing retard" via knock control from the
individual cylinders. The ignition timing retard occurs via KW (crankshaft angle).
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Page 42 of 64
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Display Group 22 -Ignition- Knock control
Driving mode
Read measuring value block
22
Indicated on display
xx.x RPM x.x %
xx.x KW
xx.x KW
1 2
3 4
Display fields
Specified value
Evaluation
Ignition timing retard via knock control:
cylinder 2 0...12 KW
(crankshaft
angle)
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Ignition timing retard via knock control:
cylinder 1
0...12 KW
(crankshaft
angle)
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Engine load 15 - 175 %
Engine speed RPM
750 - 6800 RPM
Note:
The displayed digit values in display fields 3 and 4 reflects the actual "ignition timing retard" via knock control from cylinders 1
and 2. The ignition timing retard occurs via KW (crankshaft angle).
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Page 43 of 64
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Display Group 23 -Ignition- Knock control
Driving mode
Read measuring value block
23
Indicated on display
xx.x RPM x.x %
xx.x KW
xx.x KW
1 2
3 4
Display fields
Specified value
Evaluation
Ignition timing retard via knock control:
cylinder 4 0...12 KW
(crankshaft
angle)
Page 28
-40
Ignition timing retard via knock control:
cylinder 3
0...12 KW
(crankshaft
angle)
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Engine load 15 - 175 %
Engine speed RPM
750 - 6800 RPM
Note:
The displayed digit values in display fields 3 and 4 reflects the actual "ignition timing retard" via knock control from cylinders 3
and 4. The ignition timing retard occurs via KW (crankshaft angle).
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11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.28.1