Test sequence: Notes

Connect testing and information system VAS5051. See VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM VAS5051, CONNECTING AND SELECT FUNCTIONS . Select vehicle system "01 - Engine electronics" in selection. Engine must be running at idling speed.

Display on VAS5051:

Fig 1: Display On VAS5051 - Checking Knock Control Stop (1 Of 4)

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Under -1- select diagnostic function "08 - Read measured value block".

Display on VAS5051:

Fig 2: Display On VAS5051 - Checking Knock Control Stop (2 Of 4)

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1 - Enter display group max. input value = 255

Enter "020" for "display group number 020" in zone -2- and confirm entry by pressing -Q- button.

Display on VAS5051:

Fig 3: Display On VAS5051 - Checking Knock Control Stop (3 Of 4)

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Check indication in display fields -1- to -4-.

DISPLAY GROUP 020: IGNITION KNOCK CONTROL DURING DRIVING

	Display zones
	1	2	3	4
Display group 020: Ignition knock control during driving
Display	xx.x ° CA	xx.x ° CA	xx.x ° CA	xx.x ° CA
Display	Ignition angle retardation cylinder 1 through Knock control	Ignition angle retardation cylinder 2 through Knock control	Ignition angle retardation cylinder 3 through Knock control	Ignition angle retardation cylinder 4 through Knock control
Specif. value	0 to 12 ° CA	0 to 12 ° CA	0 to 12 ° CA	0 to 12 ° CA
Note:	Evaluation. See Evaluation of ignition angle retardation .

NOTE: The numbers displayed in display zones 1 to 4 represent the actual ignition timing retardation due to the knock control of the individual cylinders. The ignition angle retardation is carried out late in ° CA (crankshaft degrees).

To change to display group 021, Press up button.

Display on VAS5051:

Fig 4: Display On VAS5051 - Checking Knock Control Stop (4 Of 4)

Courtesy of AUDI OF AMERICA, INC.

Check indication in display fields -1- and -2-.

DISPLAY GROUP 021: IGNITION KNOCK CONTROL DURING DRIVING

	Display zones
	1	2	3	4
Display Group 021: Ignition knock control during driving
Display	xx.x ° CA	xx.x ° CA
Display	Ignition angle retardation cylinder 5 through Knock control	Ignition angle retardation cylinder 6 through Knock control
Specif. value	0...12 ° CA	0...12 ° CA
Note:	Evaluation. See Evaluation of ignition angle retardation .

NOTE: The numbers displayed in display zones 1 and 2 represent the actual ignition timing retardation due to the knock control of the individual cylinders. The ignition angle retardation is carried out late in ° CA (crankshaft degrees).

Exit function "08 - Read measured value block" by pressing [left arrow] button.