ignition AUDI A4 1997 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Repair Manual

01-209
Display group 027 Display
shows Display specified
value Designation/diagnosis
Basic setting
27
1 2 3 4 X 1 = Malfunction Indicator Lamp (MIL) wire from Transmission Control Module
(TCM)
X 2 = Fuel level signal from instrument cluster
0.000 V 3 = ---------------
0.000 V 4 = --------------- Notes on display field 1:

On vehicles with manual transmission, "1" is always displayed.
Checking Malfunction Indicator Lamp (MIL) wire from transmission control module page 24
-105
.
X
Meaning of the 1-digit display:

Value "0" = ignition on, engine not running
Value "1" = engine running Note on display field 2:

Check fuel level signal from instrument cluster page 24
-107
.
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X
Meaning of the 1-digit display:

Value "0" = ignition on and engine not running, or, engine running and fuel tank contents less than 12 liters (3.2 gal)
Value "1" = engine running and fuel tank contents greater than 12 liters (3.2 gal)
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01-232
Display group 041 (Voltage signal of oxygen sensors in front of and behind three way catalytic converter) Display
shows Display specified
value Designation/diagnosis
Basic setting
41
1 2 3 4 _.___ V 1 = Voltage signal, bank 1, heated oxygen sensor 1 display group 010, display
field 3 _.___ V 2 = Voltage signal, bank 2, heated oxygen sensor 1 display group 010, display
field 4 _.___ V 3 = Voltage signal, bank 1, heated oxygen sensor 2
_.___ V 4 = Voltage signal, bank 2, heated oxygen sensor 2 Notes on display field 3 and 4:

The voltage signals of bank 1 heated oxygen sensor 2 and/or bank 2 heated oxygen sensor 2 should not be evaluated
until at least 50 sec. after the oxygen sensor heating is switched on display group 040. With cold engine and ignition on, a voltage signal of 0.400 volts is displayed in all four display fields. With very hot engine
and ignition on, a signal of 0.000 volts is displayed in display field 3 and 4.
The voltage signal of the heated oxygen sensors behind the three way catalytic converter must lie between about 0.5 volts
and 0.6 volts with a three way catalytic converter with sufficient effect (conversion). During deceleration fuel shut off, the
voltage signal must be less than 0.1 volts constantly. During operation with wide open throttle enrichment, the voltage
signal must be greater than 0.6 volts.
If there is wide open throttle (signal voltage during wide open throttle enrichment greater than 0.6 volts) with a new three
way catalytic converter, distance driven less than 5,000 km (3,000 mi.) after a preceding deceleration fuel shut off (signal
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01-246

8D0906266 2.8l V6/2V MPI OBD2
D01
Coding 01051
WSC 06388

ECM identification and entered coding (e.g. 01051) are shown.
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -6- to select "End Output" function 06.
Rapid data transfer
Q
06 - End Output

Indicated on display
- Press -Q- button to confirm input.
Rapid data transfer
HELP
Insert address word XX

Indicated on display
Notes:
The ECM uses the coding that is entered and displayed only after the
ignition has been switched off once. Incorrect coding leads to:
Driving performance problems (jerky shifting, rough load change, etc.)Increased fuel consumptionElevated exhaust gas valuesDecrease in transmission service lifeStoring of malfunctions that are not present in DTC memoryFunctions are not carried out (oxygen sensor control, triggering of the
EVAP canister system, etc.).
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01-249

Read Measuring Value Block (scan tool
function 08)


Notes:

Display groups 000-045 and 099 are identical to
the display groups 000-045 and 099 described
with "Basic Setting" function 04.
After "Basic Setting" function 04 is called up,
the ECM initiates the operations described
below. These operations are not carried out
after calling up "Read Measuring Value Block"
function 08.
Operations after calling up "Basic Setting"
function 04:
Constant ignition timing point of 12 BTDC will
be output in idle

Digital idle speed control is blocked
Evaporative Emissions (EVAP) canister purge
regulator valve is closed
A/C compressor is shut off

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01-254

Adaptation (scan tool function 10)


Note:
The function "Adaptation" is selected with
buttons -1- and -0-. Display groups 001 and 002
can be called with function 10. If the stored
adaptation value is changed in display group 001
and/or display group 002 by input of another
adaptation value, this has no effect on the fuel
injection and ignition system.
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01-255

Test box VAG 1598/19, connecting


CAUTION!

Wait at least 30 seconds after the ignition has
been switched off before disconnecting the
ECM harness connector.

Note:
By disconnecting the ECM, the permanent
voltage supply is disconnected and therefore the
learning values, DTC memory and readiness
code are erased.

- Switch ignition off.

- Remove ECM.

Note:
Terminal assignments of the connectors A, B, C, D and E are identical to
the socket assignments of the test box. - Connect test box VAG 1598/19 to wiring harness.
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01-265

Engine Control Module (ECM), replacing


Notes:

By disconnecting the ECM, the permanent
voltage supply is disconnected and therefore
the learning values, DTC memory and
readiness code are erased.
If uneven idle occurs after the ECM is installed,
let the engine idle for a few minutes so that the
learning process can be carried out page 01
-
150
, Basic Setting, display groups 007 and/or
008.
If the engine control module is replaced, carry
out the following work steps in the specified
sequence.

- Switch ignition on.

- Connect VAG 1551 scan tool and operate until
control module identification is displayed page
01
-7 .
8D0906266 2.8l V6/2V MPI OBD2
D01
Codin
g 01051
WSC 06388

ECM identification and the coding are shown on the display.
- Print out ECM identification and compare coding to table of coding
variations page 01
-247
.
-
Press button.
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Rapid data transfer
HELP
Select function XX

Indicated on display
- Switch ignition off.
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