heater AUDI A4 1995 B5 / 1.G AWM Engine Oxygen Sensor Control Checking Workshop Manual
Page 4 of 46
24-74
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
Note
If specified value is not obtained Page 24
-81
If specified value is obtained but there is a malfunction stored in DTC memory Check oxygen
sensor adaptation values and control, Page 24
-75
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
Note:
The first field of the 3 digit indication (heating) fluctuates between 0 and 1.
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Page 7 of 46
24-77
Continuation
If specified value in display field 1 is not obtained
or if value does not fluctuate at least 2 %:
- Road test vehicle in order to free oxygen sensor
of possible residue and repeat test.
If specified value in display field 1 is not obtained
even after road test or if value does not fluctuate
at least 2 %:
- Check primary voltage Page 24
-81
.
- Test oxygen sensor heater before catalytic
converter Page 24
-89
.
- Check oxygen sensor before catalytic converter
for aging Page 24
-84
.
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Page 19 of 46
24-89
Oxygen sensor heating, Oxygen Sensor
(O2S) Heater -Z19- before catalytic
converter, checking
Special Tools and Equipment
VAG1526A
VAG1594A
VAG1598/31
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Page 30 of 46
24-98
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
Note
If specified value is not obtained Page 24
-107
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.
Oxygen sensor control of oxygen sensor after catalytic converter (B1-S2) is not active without engine load.
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Page 39 of 46
24-107
Oxygen sensor heating, Oxygen Sensor
(O2S) Heater 1 -Z29- after catalytic
converter, checking
Special Tools and Equipment
VAG1526A
VAG1594A
VAG1598/31
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play?action=Goto&t
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