buttons AUDI A8 1996 D2 / 1.G AEB Engine Readiness Codes

01-59


Readiness code

Readiness code, checking


Note:
The readiness code will be erased:

When Diagnostic Trouble Code (DTC) memory
is erased
When the Engine Control Module (ECM)
harness connector is disconnected (e.g. to
connect VAG 1598/22 test box)
When the battery is disconnected

Required special tools and test equipment
VAG 1551 Scan Tool (ST) with adapter cable
VAG 1551/3

Checking

- Connect VAG 1551/ VAG 1552 Scan Tool (ST)
and press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (with ignition
switched on) Page 01
-7 .
Rapid data transfer
HELP

Indicated on display
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Select function XX
- Press buttons -0- and -8- to select "Read Measuring Value Block"
function 08, and press -Q- button to confirm input.
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01-60

Read Measurin
g Value Block
HELP
Input display group number XXX

Indicated on display
- Press buttons -0-, -8- and -6- to input display group number 86, and
press -Q- button to confirm input.
Read Measurin
g Value Block 86

1
2
3
4

Indicated on display (1-4 display fields)
Note:
The readiness code is generated as soon as only zeros ("0") are shown in
display field 1. - Check readiness code values in display field 1.
Specified value: 00000000
-
Press button to advance program sequence.
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -6- to select "End Output" function 06, and press
-Q- button to confirm input.
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01-62

Readiness code, generating


Required special tools and test equipment

VAG 1551 Scan Tool (ST) with adapter cable
VAG 1551/3

Test requirements
No malfunctions stored in DTC memory
Engine not stopped (ignition not switched off)
during the test
Vehicle not moving
All electrical consumers switched off (coolant
fan must not run during test)

Test sequence

- Connect VAG 1551/ VAG 1552 Scan Tool (ST)
and press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (with ignition
switched on) Page 01
-7 .
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01-63

Step 1: Check DTC memory Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -2- to select the "Check DTC Memory" function
02, and press -Q- button to confirm input.
No DTC reco
gnized

Indicated on display
If one or more DTCs are stored:
If no DTCs were recognized: - Repair cause of malfunction.
- Erase DTC memory.
- Stop engine, start engine again, and road test.
- Check DTC memory again and erase.
-
Press button to advance program sequence.
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01-64

Step 2: Erase DTC memory Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
When erasing DTC memory, the readiness code is also erased. - Press buttons -0- and -5- to select the "Erase DTC Memory" function
05, and press -Q- button to confirm input.
Rapid data transfer DTC Memor
y is erased

Indicated on display
-
Press button to advance program sequence.
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01-65

Step 3: Adaptation of throttle valve control
module to ECM Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block"
function 08, and press -Q- button to confirm input.
Read Measuring Value Block
HELP
Input displa
y group number XXX

Indicated on display
- Press buttons -0-, -6- and -0- to input display group number 60, and
press -Q- button to confirm input.
Read Measuring Value Block 60
1
2
3
4

Indicated on display (1-4 display fields) - Press -4- button to select "Basic Setting" function 04 (adaptation of
throttle valve control module to ECM)
System in Basic Setting 60
1
2
3
4

Indicated on display (1-4 display fields) - Check specified values in display fields 3 and 4:
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01-68

Step 5: Oxygen Sensor (O2S) control
operating condition Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block"
function 08, and press -Q- button to confirm input.
Read Measuring Value Block
HELP
Input displa
y group number XXX

Indicated on display
- Press buttons -0-, -3- and -0- to input display group number 30, and
press -Q- button to confirm input.
Read Measuring Value Block 30
1
2
3
4

Indicated on display (1-4 display fields) - Increase engine speed to 1800-2200 RPM.
- Hold at 1800-2200 RPM until:

Specified value of "111" is reached in display field 1
Specified value of "110" is reached in display field 2
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01-73

Step 7: Three Way Catalytic Converter (TWC)
diagnosis Initiate basic setting
HELP
Input display group number XXX

Indicated on display
- Press buttons -0-, -4- and -6- to input display group number 46, and
press -Q- button to confirm input.
System in Basic Setting 46
1
2
3
4

Indicated on display (1-4 display fields)
Note:
The test time for TWC diagnosis is approx. 60 seconds. - Hold engine speed at 1800-2200 RPM until display changes from "Test
OFF" to "Test ON" in display field 4.
- Continue to hold at 1800-2200 RPM until specified value "Cat B1 OK"
is indicated in display field 4.
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01-75

Step 8: Evaporative Emissions (EVAP)
system and fuel tank leak detection

Note:
During this diagnosis there should be no engine
load, otherwise the diagnosis is interrupted and
can only be restarted after a period of
acceleration.

- Start engine and let run at idle.Initiate basic settin
g
HELP
Input displa
y group number XXX

Indicated on display
- Press buttons -0-, -7- and -0- to input display group number 70, and
press -Q- button to confirm input.
System in Basic Setting 70
1
2
3
4

Indicated on display (1-4 display fields)
If the diagnosis is initiated by the ECM, the display changes from "Test
OFF" to "Test ON" in display field 4.
Note:
If the display changes from "Test ON" to "Test OFF" during the diagnosis,
briefly accelerate the engine to reset and repeat the test. - Let engine continue to run at idle until the specified value "EVAP OK" is
indicated in display field 4.
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