engine AUDI A3 1998 8L / 1.G ATW Engine Readiness Code Workshop Manual

01-68

Readiness code is returned to"0 1 1 0 1 1 0 1"
if:

DTC memory was erased,
Voltage supply to ECM was cut off (e.g.
connector disconnected, battery disconnected)
a new Engine Control Module (ECM) was
installed
In this case, the readiness code must be re-
generated Page 01
-73
.

Note:
During driving operation in various load
conditions, exhaust relevant tests are performed
by the control module and the readiness code is
generated on its own. In this case, however, the
concluding control possibilities are not available,
meaning that it will not be indicated whether the
vehicle is free of malfunctions upon transfer to
the customer.
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01-69

Read readiness code


Test sequence

- Connect VAS5051 tester or VAG1551 scan tool
and select control module for engine electronics
using "address word" 01 Page 01
-10
. Ignition
must remain switched on.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block" and
press -Q- button to confirm input.
Read measuring value block
Q
Enter displa
y group number XXX

When indicated on display
- Press buttons -0-, -8- and -6- to select "display group number 086" and
press -Q- button to confirm input.
Read Measuring Value Block 86
1
2
3
4

When indicated on display
- Check readiness code in display field 1

Specification: 0 0 0 0 0 0 0 0
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01-73

Readiness code, generating


Special Tools and Equipment

Requirements
Note:
If, during a work step, the test result is indicated as "OK" immediately after
selecting a display group, the test has already been carried out and it is
OK to continue on to the next work step.
VAG1788/10 RPM adjusterVehicle stationary Vehicles with automatic transmission Selector lever in P or N. Electrical consumers switched off (radiator fan must NOT run during
test). A/C switched off. Coolant temperature at least 80 C Display group 004, display field
3. Important: Drive engine warm via road test if possible.
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01-74

Work step 1: Check DTC Memory

Test requirement:

Engine not running, ignition switched on.

- Connect VAS5051 tester or VAG1551 scan tool
and select control module for engine electronics
using "address word" 01 Page 01
-10
.
Rapid data transfer
HELP
Select function XX

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

Number of stored DTCs or "No DTC recognized" will be indicated on
display.
If a DTC is stored:
If no DTCs are stored: - Repair malfunction, erase DTC memory. Road test vehicle and then
check DTC memory as a control measure.
-
Press button.
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01-75

Work step 2: Erase DTC Memory

Test requirement:

Engine not running, 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 buttons -0- and -5- to select "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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01-76

Work step 3: Adapt throttle valve control
module to Engine Control Module (ECM)

Test requirement:

Engine not running, ignition switched on.
Rapid data transfer
HELP
Select function XX

When indicated on display
- Press buttons -0- and -4- to select "Initiate basic setting" and press -Q-
button to confirm input.
Basic Setting
Q
Enter display group number XXX

When indicated on display
- Press buttons -0-, -6- and -0- to select "display group number 060" and
press -Q- button to confirm input.
System in basic setting 60
1
2
3
4

When indicated on display
- Check specified values in display fields 3 and 4
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01-78

Work step 4: Kick down function, adapting
1)

1) Only vehicles with automatic transmission

Test requirement:

Engine not running, ignition switched on.
Basic Setting
Q
Enter displa
y group number XXX

When indicated on display
- Press buttons -0-, -6- and -3- to select "display group number 063" and
press -Q- button to confirm input.
System in basic setting 63
1
2
3
4

When indicated on display
Note:
There will be a prompt: "Operate kickdown".
Note:
During adaptation of the kick down point, the VAG1551 will display "Kick
down ADP in progress". After successful adaptation of the kick down
point, the VAG1551 will display "Kick down ADP OK". - Depress accelerator pedal completely, past kick down point, and hold
down.
- Check specified value in display field 4:
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01-80

Work step 5: Check operating condition of
oxygen sensor control

- Start engine (for a vehicle with manual
transmission: engage clutch).

Note:
After starting engine, it may be necessary to
select the Engine Control Module (ECM) again
using "address word" 01 and the function "Initiate
basic setting" using "04".

- Install VAG1788/10 RPM adjuster on accelerator
pedal and raise engine speed to 2000 RPM.

Test requirement:

Engine running at 2000 RPM.
Basic Setting
Q
Enter display group number XXX

When indicated on display
- Press buttons -0-, -3- and -0- to select "display group number 030" and
press -Q- button to confirm input.
System in basic setting 30
1
2
3
4

When indicated on display
Note: - Check oxygen sensor status in display fields 1 and 2.
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01-81


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
Note:

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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01-82

Work step 6: Diagnostic of oxygen sensor
aging before catalytic converter

Test requirement:

Engine continues to run at 2000 RPM.
Basic Settin
g
Q
Enter display group number XXX

When indicated on display
- Press buttons -0-, -3- and -4- to select "display group number 034" and
press -Q- button to confirm input.
System in basic setting 34
1
2
3
4

When indicated on display
Note:
A few minutes may pass until a diagnostic result is reached. - Check specified value in display field 4:
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