2000 AUDI A4 ignition

01-146

Notes:

The output diagnostic test mode can only be
carried out with the ignition switched on and the
engine NOT running.
The output diagnostic test mode is interrupted if
the engine is started or a rotary pulse is
recognized.
During the output diagnostic test mode, the
individual outputs are triggered until the
program is continued by pressing the button.

The outputs are checked by listening for the
sound of the component being actuated, of by
feeling for mechanical evidence of actuation
(clicking, vibration, etc.).
Without letting the engine run briefly, switch the
ignition off for approx. 20 sec before repeating
the output diagnostic test mode.

- Connect VAG 1551 scan tool and initiate until
"Select function" is indicated on the display
page 01
-7 .
Rapid data transfer
HELP
Select function XX

Indicated on display
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01-149

Only on vehicles with secondary air injection
(AIR) system Output diagnostic test mode Secondar
y Air In
jection
(AIR
) solenoid valve -N112

Indicated on display
This valve is triggered (clicks) until you move on to the next output by
pressing the button. - If the valve is not triggered (does not click), check -N112-.
Output diagnostic test mode Secondar
y Air In
jection
(AIR
) pump rela
y -J299

Indicated on display
The secondary air injection pump relay -J299- triggers the secondary air
pump motor and it runs until the output DTM is ended by pushing the
button (maximum 10 sec.). - If secondary air injection pump motor does not run, check engine and -
J299-.
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
Before selecting "Output Diagnostic Test Mode" function 03 again, switch
ignition off for approx. 20 sec.
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01-151

Note:
After function 04 is called up, the Engine Control
Module (ECM) carries out the following
operations:

Constant ignition timing point of 12 BTDC is
output in idle.

Digital idle speed control is blocked.
Evaporative emissions canister purge regulator
valve is closed.
A/C compressor is switched off.
EGR vacuum regulator solenoid valve is
closed
No coolant temperature correction-fixed value
of 80 C (176 F)

Learning values are relearned (idle and CO
content are adjusted automatically)
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01-158
Note:
Display groups 11 to 45 are used for troubleshooting when there are driving performance problems, and used to evaluate
components and systems that influence the exhaust. Display group
Display shows
Designation
011 Basic setting 11
1 2 3 4 1 = Ignition timing point w/o knock control, w/o idle speed control
2 = Ignition timing point with knock control and idle speed control
3 = Ignition timing point access to idle speed control
4 = Closed Throttle Position (CTP) switch function
012 Basic setting 12
1 2 3 4 1 = Engine speed
2 = Engine load
3 = Ignition timing point map switching
4 = Ignition timing point retarded by knock control
013 Basic setting 13
1 2 3 4 1 = Ignition timing point map switching
2 = Ignition timing point retarded by knock control (cylinder 1)
3 = Ignition timing point retarded by knock control (cylinder 2)
4 = Ignition timing point retarded by knock control (cylinder 3)
014 Basic setting 14 1 = Ignition timing point map switching
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1 2 3 4 2 = Ignition timing point retarded by knock control (cylinder 4)
3 = Ignition timing point retarded by knock control (cylinder 5)
4 = Ignition timing point retarded by knock control (cylinder 6)
015 Basic setting 15
1 2 3 4 1 = Engine speed (RPM)
2 = Knock sensor signal (cylinder 1)
3 = Knock sensor signal (cylinder 2)
4 = Knock sensor signal (cylinder 3)
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and starts to go up again
4 Greater than
14.000 V
or
Less than
12.000 V
Generator faulty
Overvoltage because of starting aid
Poor ground connection to ECM -J192-
Discharged battery
Current draw with ignition off - Check voltage
- Check battery charging status
- Check voltage supply of Engine Control
Module (ECM) Repair Group 28
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01-170
Display group 003 Display shows
Display/specified value
Designation
Basic setting 3
1 2 3 4 650 - 750 RPM 1 = Momentary idle speed
15.0 - 35.0% 2 = Engine load idle1)
0% and/or greater than 95% 3 = Throttle angle - at idle: 0%; at wide open throttle: > 95%
... km/h 4 = Momentary vehicle speed 1) Evaluate engine load tolerance range only at idle during "Basic Setting" function 04.
Note on display field 1:
Idle speed on vehicles without A/C and rear windshield heater switched on: 750-850 RPM.
Notes on display field 3:
For the testing at wide open throttle, stop engine, and switch ignition on.
Since in vehicles with manual transmission and automatic transmission different throttle bodies are installed, the start of
opening of the throttle body can be measured with ignition on and thus incorrect installation can be checked
Manual transmission: 45-53%
Automatic transmission: 27-35%
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01-193
Display group 011 Display
shows Specified display
value Designation
Basic setting
11
1 2 3 4 ... BTDC
1 = Ignition timing point without knock control and without idle speed control

... BTDC 2 = Ignition timing point with knock control and digital idle speed control (average
value for all cylinders)

_._ crankshaft 3 = Ignition timing point access to digital idle speed control
0 and/or 1 4 = Closed Throttle Position (CTP) switch function:
Open = 0; Closed = 1
Notes on display field 1:

At idle-Closed Throttle Position (CTP) switch closed-an ignition timing point of 12 BTDC is displayed. When the engine speed is increased-CTP switch open-the current ignition timing point is displayed without knock control
and without digital idle speed control.
Notes on display field 2:
Digital idle speed control is only active with Closed Throttle Position (CTP) switch closed.
Knock control is active starting at an engine load greater than 40% Display group 013 and/or 014.
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