1996 AUDI A4 engine

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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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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01-66


Display fields

1 2 3 4
Display group 60: Adaptation of throttle valve control module to Engine Control Module (ECM)
Display
xxx
xxx
Idle
Part throt.
Full throt.
Decel
Enrich ADP.runs
ADP. OK
ADP.ERROR
Indicated Throttle valve angle Throttle valve actuator angle Operational status Adaptation status
Specified value --- --- Idle ADP. OK
If "ADP. ERROR" is indicated in display field 4:

- Check DTC memory Page 01
-15
.
If the specified value "ADP. OK" is indicated in
display field 4:

-
Press button to advance program
sequence.
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01-67

Step 4:

- Start engine and let run at idle.
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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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Display fields

1 2 3 4
Display group 30: Oxygen Sensor (O2S) control operating condition
Display xxx xxx
Indicated Status of Heated Oxygen Sensor (HO2S), bank 1,
before TWC (B1-S1) Status of Heated Oxygen Sensor (HO2S), bank
1, after TWC (B1-S2)
Specified
value 111 110 ---
---


Evaluation Page 01
-70

Evaluation Page 01
-70


If the specified values are not indicated:

- Check DTC memory Page 01
-15
.
If the specified values are indicated in display
fields 1 and 2:

- Continue to hold engine speed at 1800-2200
RPM.
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Step 6: Oxygen sensor aging (time period)

- Press -4- button to select "Basic Setting"
function 04.

- Press -3- button four times to advance to display
group number 34. System in Basic Setting 34
1
2
3
4

Indicated on display (1-4 display fields) - 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 "B1-S1. OK"
is indicated in display field 4.
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