Adaptation of the throttle valve control unit with CCS — AUDI

The idle stabilisation requires the engine control unit to know the stop positions of the throttle valve positioner (V60) and the potentiometer characteristics of the throttle valve positioner sensor (G127) and throttle valve potentiometer (G69).

The learning process (adaptation) is necessary if:

The power supply to the engine control unit has been interrupted (e.g. the battery disconnected) .
The throttle valve control unit was replaced.
The engine control unit was replaced.

The learning process (adaptation process) is performed:

Automatically if the ignition is switched on once for at least 6 seconds without actuating the starter or the accelerator pedal.
By initiating the basic setting (function 04) Display Group 98 with the engine stopped.

Test conditions

No fault stored in fault memory
=> Page
01-7
. Interrogate the fault memory.

Connect the V.A.G 1551 fault reader (V.A.G 1552) and select the engine electronics control unit with the "Address word" 01. During this, the ignition must be switched on.
(Connecting the fault reader and selecting the control unit for the engine electronics => Page
01-3
.)

Rapid data transfer
HELP
Select function XX
Display readout

Press keys 0 and 4 for the function "Introduction of basic setting" and confirm entry with the Q key.

Basic setting
HELP
Enter display group number XXX
Display readout:

Press keys 0, 9 and 8 for "Display group number 98" and confirm entry with the Q key.

System in basic setting
98
⇒
x.xxx V
x.xxx V
Idle ADP. running
Display readout

When the Q key is pressed, the throttle valve positioner moves to min., - max. - and five intermediate positions. The control unit records the voltage reading for each position in its non volatile memory. This process takes no more than 10 seconds. The throttle valve then remains in the start position for a brief period before closing.

System in basic setting
98
⇒
x.xxx V
x.xxx V
Idle ADP. OK
Display readout:

______________________________________________

Basic setting 98
⇒
X,XXX V
X.XXX V
Idle ADP. not OK
If one of the following messages appears on the display, the adaptation was terminated.

Basic setting 98
⇒
X,XXX V
X.XXX V
Idle ADP. running
Terminate adaptation by pressing the ⇒ key.

Basic setting 98
⇒
X,XXX V
X.XXX V
Idle
ERROR

Function is unknown or cannot
be performed at present

Interrogate the fault memory
No fault detected
⇒
If no faults are recognised, check whether the idling speed switch opens and closes when the accelerator pedal is operated, check the idling switch with CCS.
=> Page
24-85
.

Idling switch does not open
⇒
Short to earth
If one of these faults is displayed, check whether the idling speed switch opens and closes when the accelerator pedal is operated. Test idling switch with CCS.
=> Page
24-85
.

Idling switch does not close
⇒
Open circuit

Voltage supply
⇒
Signal too low
If this fault is displayed, check the power supply to the engine control unit (voltage at terminal 30 on engine control unit has dropped below 10 V).
-G127 sensor for throttle valve positioner
⇒
Signal too low or too high
If the following faults are displayed, check the -G127 sensor for the throttle valve positioner => Page
24-88
.

-G69 throttle valve potentiometer
⇒
Signal too low or too high

-G127 sensor for throttle valve positioner
⇒
Implausible signal

Note:

If the basic setting of the control unit is interrupted, the cause could be one of the following:

The throttle valve does not reach the mechanical idle stop due to contamination.
Throttle cable incorrectly adjusted.
The battery voltage is too low.
The throttle valve control unit or wiring is defective.

After an interruption, the fault "Basic setting not completed, fault in basic setting" is stored in the fault memory. The next time the ignition is switched on, the basic setting is automatically performed again.

Terminate the engine basic setting by pressing the ⇒ key.
Press keys 0 and 6 for the function "End data transfer" and confirm the entry with the Q key.