display AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst

01-103

X
X
X
X
X
X
X
X
Notes for display group 086 display field 1 (Ready-Bits)

1 = Three Way Catalytic Converter (TWC) (diagnostic of catalytic converter)

Display 0 = ready
Display 1 = not ready (Readiness code generating Page 01
-105
)

2 = TWC Catalytic Converter (not available/always "0")

3 = EVAP system (0 = ready)

Display 0 = ready
Display 1 = not ready (Readiness code generating Page 01
-105
)

4 = Secondary Air Injection (AIR) System

Display 0 = ready
Display 1 = not ready (Readiness code generating Page 01
-105
)

5 = Climate Control (diagnosis not applicable/always "0")

6 = Oxygen sensors

Display 0 = ready
Display 1 = not ready (Readiness code generating Page 01
-105
)

7 = Oxygen sensor (O2S) heater

Display 0 = ready
Pa
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Display 1 = not ready

8 = Exhaust Gas Recirculation (EGR) system (not applicable/always "0")
Note:
The readiness code is only set if all position are displayed with "0."
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01-104
If the specified value in display field 1:
"00000000" is obtained:

-
Press button.Rapid data transfer
HELP
Select function XX

Indicated on display (function selection)
If specified value is not reached: - Check DTC memory Page 01
-15
(No malfunction should be stored
in the DTC memory).
- Generate readiness code Page 01
-105
.
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01-106

Work step 1: Check DTC memory

- Connect Vehicle Diagnostic, Test and
Information system VAS5051 or VAG1551 scan
tool to vehicle and select control module for
engine electronics using "address word" 01
Page 01
-9 . The ignition is switched on.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons -0- and -2- to select function "Check DTC Memory" and
press -Q- button to confirm input.
X DTC reco
gnized!

Number of stored DTCs or "No DTC recognized" will be indicated on
display.
If a DTC is stored:
If no DTC is stored: - Repair malfunction, erase DTC memory. Road test vehicle and then re-
check DTC memory as a control measure.
-
Press button.
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01-107

Work step 2: Erase DTC Memory

Test requirements

Ignition switched on
Rapid data transfer
HELP
Select function XX

When indicated on display
Note:
When DTC memory is erased, readiness code is reset and must therefore
be re-generated. - Press button -0- and -5- to select function "Erase DTC Memory" and
press -Q- button to confirm input.
Rapid data transfer DTC memor
y is erased

When indicated on display
-
Press button.
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01-108

Work step 3: Adaptation Throttle Valve
Control Module to Engine Control Module
(ECM)

Test requirements

Ignition switched on.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons "04" for the function "Basic Setting" and press Q button
to confirm input.
System in Basic Settin
g
Q
Input displa
y group number XXX

When indicated on display
- Input "060" for "display group number 60" and press Q button to
confirm input.
System in Basic Setting 60
1
2
3
4

When indicated on display
- Check readiness code in display field 3 and 4:
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01-109


Display fields

1 2 3 4
Display group 060: Adaptation of throttle valve control module
Display xx % xx %
x
---
Indicated Throttle
valve angle
(angle
sensor 1) Throttle
valve angle
(angle
sensor 2) Adaptation step counter
Adaptation condition
Work area 0 - 100 % 0 - 100 %
0 - 8
ADP. runs
ADP. OK
ADP. ERROR
Specified
value 3 - 93 % 97 - 3 %
8
ADP. OK
Note:


During adaptation, adaptation step counter
must reach the number 8. (Some numbers
may be skipped). If "ADP. ERROR." is displayed:
Check DTC memory Page
01
-15
.
If specified value is not
obtained: Note, Page Page
24
-152
.
Note for display field 3:
During adaptation different digits are displayed in display field 3, which indicate the particular adaptation condition. It is not
important what the adaptation step counter (display field 3) displays during adaptation, rather that display field 4 displays the
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01-110
If specified value "ADP. OK" is obtained:

- Press -C- button.

Work step 4: Diagnosis of EVAP canister
purge regulator valve

- Start engine (vehicles with manual transmission
depress clutch pedal)

Note:
If necessary, ECM must be re-selected with the
"address word" 01 following engine start, and the
function "initiate basic setting" selected with "04."

Test requirements

Engine at idle
Coolant temperature > 85 C (display group
4, display field 3)
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press button -0-, -7- and -0- to select "display group number 070" and
confirm input with -Q- button.
System in Basic Setting 70

When indicated on display
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1
2
3
4
Note:
If test is not initiated or the display jumps from "Test ON" to "Test OFF"
slightly accelerate engine briefly, test will be repeated. - Check specified value in display field 4:
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01-111


Display fields

1 2 3 4
Display group 070: Diagnostic of EVAP canister purge regulator valve
Display xx % xx.x % xx %
Test ON
Indicated EVAP valve duty
cycle during
diagnosis Oxygen sensor
control deviation
during diagnosis Relative
Ground via
EVAP valve Diagnostic condition
Work
Range min.: 0 %
max.: 100 % min.: -25.0 %
max.: 25.0 %
Test OFF
Test ON
EVAP OK
EVAP n.OK
Abort
Specified
value xx % -5.0 to 4.0 %
xx - xx %
1)
EVAP OK
Note:



If "EVAP n. OK" is displayed: Check DTC
memory Page 01
-15
. Check EVAP canister
purge regulator valve -N80 Page 24
-134

1) A display appears only, if the diagnostic result occurred via deviation from the Idle Air Control (IAC) in a specified tolerance
range and not from deviation from the oxygen sensor control (e.g.: oxygen sensor 1 from EVAP canister). Display field 3 is
only indicated if there is a deviation.
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