catalytic converter AUDI A4 1995 B5 / 1.G AWM Engine Readiness Code Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1995, Model line: A4, Model: AUDI A4 1995 B5 / 1.GPages: 43, PDF Size: 0.14 MB
Page 6 of 43
01-82
X
X
X
X
X
X
X
X
Notes for display group 086, display field 1
Diagnostic of catalytic converter
Indication 0 = test was performed
Indication 1 = test was not performed (generate readiness code Page 01
-84
)
Indication always 0
EVAP system
Indication 0 = test was performed
Indication 1 = test was not performed (generate readiness code Page 01
-84
)
Secondary air system
Indication 0 = test was performed
Indication 1 = test was not performed (generate readiness code Page 01
-84
)
Indication always 0
Oxygen sensors
Indication 0 = test was performed
Indication 1 = test was not performed (generate readiness code Page 01
-84
)
Oxygen sensor heating
Indication 0 = test was performed
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Page 23 of 43
01-95
Display fields
1 2 3 4
Display group 030: Oxygen sensor status
Display
X X X
X X X
Indicated
Oxygen sensor status, bank 1, sensor 1
Oxygen sensor status, bank 2, sensor 1
Functional range
0 = off
1 = on 0 = off
1 = on
Specified value
1 1 1
1 1 0
Significance of 3 digit indications in display group 030 X
X
X
Display fields 1 and 2
X Oxygen sensor control: 0= not active; 1 = active
X Operational readiness of oxygen sensor: 0= not active; 1 = active
X Condition of oxygen sensor heater: 0= not active; 1 = active
Notes:
The first position of the 3 digit indication (heating) fluctuates between 0 and 1 at certain operation points.
Oxygen sensor control of oxygen sensor behind catalytic converter (bank 1, sensor 2) is not active without engine load,
meaning that the third position of the 3-digit display is 0.
-
Do not start test until indication in display field 1
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Page 25 of 43
01-96
Work step 6: Diagnostic of oxygen sensor
aging before catalytic converter
Test requirement:
Engine continues to run at 2600 RPM.
Display on VAS5051:
Note:
A few minutes may pass until a diagnostic result is reached. -
Press button 4 times to change into display group 034.- Check specified value in display field -4-.
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Page 26 of 43
01-97
Display fields
1 2 3 4
Display group 034: Oxygen sensor aging diagnostic, oxygen sensor before catalytic converter (bank 1)
Display xxxx/min
xxx C
x.x
---
Indicated Engine speed
(RPM) Exhaust
temperature Dynamic
factor Diagnostic condition
Functional
range Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified
value 2600 RPM larger than 350
C
0.5 to 2.5 B1-S2 OK
Note
If "B1-S1 not OK" is displayed: Check DTC
memory Page 01
-12
.
If specified value "B1-S1 OK" is obtained:
- Perform next work step.
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Page 27 of 43
01-98
Work step 7: Diagnostic of operational
readiness of oxygen sensor behind catalytic
converter
Test requirement:
Engine continues to run at 2600 RPM.
Display on VAS5051:
-
Press button 2 times to change into display group 036.- Check specified value in display field -2-.
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Page 28 of 43
01-99
Display fields
1 2 3 4
Display group 036: Operational readiness of oxygen sensor behind catalytic converter (bank 1)
Display x.xxx V
---
Indicated Oxygen sensor voltage Bank 2,
sensor 1 Diagnostic condition
Functional
range
Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified value 0.100 to 0.950 volts
B1-S2 OK
Note
If "B1-S2 not OK" is displayed: Check DTC memory
Page 01
-12
If specified value B1-S2 OK" is obtained:
- Perform next work step.
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Page 31 of 43
01-102
Work step 9: Diagnostic of oxygen sensor
aging behind catalytic converter
Test requirement:
Engine continues to run at 2600 RPM.
Display on VAS5051:
-
Click on - button
Display on VAS5051:
1 - Enter display group Max. input value = 255
- Select function "043" in button field -2- for "display group number 043"
and press Q button to confirm input.
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Page 33 of 43
01-104
Display fields
1 2 3 4
Display group 043: Oxygen sensor aging diagnostic, oxygen sensor behind catalytic converter (bank 1)
Display xxxx/min
xxx C
x.xxx V
---
Indicated Engine speed
(RPM) Exhaust
temperature Oxygen sensor voltage
Bank 2, sensor 1 Diagnostic condition
Functional
range Test OFF
Test ON
B1-S2 OK
B1-S2 not OK
Specified
value 2600 RPM larger than 350
C
0.100 to 0.950 volts B1-S2 OK
Note
If "B1-S2 not OK" is displayed: Check
DTC memory Page 01
-12
If specified value B1-S2 OK" is obtained:
- Perform next work step.
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Page 34 of 43
01-105
Work step 10: Diagnostic of catalytic
converter
Test requirement:
Engine continues to run at 2600 RPM.
Display on VAS5051:
Note:
Catalytic converter diagnostic lasts approx. 60 seconds. -
Press button 3 times to change into display group 046.- Check specified values in display fields -2- and -4-.
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Page 35 of 43
01-106
Display fields
1 2 3 4
Display group 046: Diagnostic of catalytic converter (bank 1)
Display xxxx/min
xxx C
x.xx
---
Indicated Engine
speed
(RPM) Exhaust temperature Measurement
Catalytic
converter -
conversion Diagnostic condition
Functional
range 0 to 8 Test OFF
Test ON
Cat B1 OK
Cat B1 not OK
Specified
value 2600 RPM
550 to 700 C
Larger than 1.0 Cat B1 OK
Note
As long as the exhaust temperature
is not within the specified range, the
test will not be initiated. If necessary,
increase or decrease RPM
If "Cat B1 not OK" is displayed:
Check DTC memory Page 01
-
12
. If no DTCs are stored,
replace catalytic converter.
If specified value "Cat B1 OK" is obtained:
- Perform next work step.
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