check engine 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 3 of 43
01-79
Readiness code, checking
Test sequence
- Connect VAS5051 tester Page 01
-7 and
select vehicle system "01 - Engine electronics".
Engine must run at idle for this.
Display on VAS5051:
- Select diagnostic function "08 - read measured value block" in
selection -1-.
Display on VAS5051:
1 - Enter display group Max. input value = 255
- Select function "086" in button field -2- for "Display group number 086"
and press Q button to confirm input.
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Page 10 of 43
01-85
Work step 1: Check DTC Memory
Test requirement:
Engine not running, ignition switched on.
- Connect VAS5051 tester Page 01
-7 and
select vehicle system "01 - Engine electronics".
Ignition must remain switched on for this.
Display on VAS5051:
- In selection -1-, click on the diagnostic function "02 - Check DTC
memory".
Display on VAS5051:
1 - DTC memory content:
0 malfunctions recognized
or
X malfunctions recognized
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Page 13 of 43
01-87
Work step 2: Erase DTC Memory
Test requirement:
Engine not running, ignition switched on.
Display on VAS5051:
Note:
When DTC memory is erased, readiness code is reset and must therefore
be re-generated. - In selection -1-, click on the diagnostic function "05 - Check DTC
memory".
Display on VAS5051:
1 - no indication (before erasing)
or
DTC memory erased
2 - Note:Perform the function?Note: Data is being erased !
- Press on "OK" button in display -2-.
-
Click on - button
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Page 18 of 43
01-91
Work step 4: Kick down function, adapting
1)
1) Only vehicles with automatic transmission
Test requirement:
Engine not running, ignition switched on.
Display on VAS5051:
Note:
There will be a prompt: "Operate kick down".
Note:
During adaptation of the kick down point, "Kick down ADP in progress" will
be indicated in display. After successful adaptation of the kick down point,
"Kick down ADP OK" will be indicated on display. -
Press button 3 times to change into display group 063.- Depress accelerator pedal completely, past kick down point, and hold
down.
- Check specified value in display field -4-.
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Page 21 of 43
01-93
Work step 5: Check operating condition of
oxygen sensor control
- Start engine (for a vehicle with manual
transmission: engage clutch).
Note:
If necessary, vehicle system "01 - engine
electronics" and diagnostic function "04 -basic
setting" must be selected again after engine
start.
- Install VAG1788/10 RPM adjuster on the
accelerator pedal and raise the engine speed to
2600 RPM.
Test requirement:
Engine running at 2600 RPM.
Display on VAS5051:
-
Click on - button
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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
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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 29 of 43
01-100
Work step 8: Diagnostic of oxygen sensor
control system
Test requirement:
Engine continues to run at 2600 RPM.
Display on VAS5051:
-
Press button to change into display group 037.- Check specified value in display field -4-.
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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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