Operation 10: Diagnosis of secondary air system

WARNING: This page is about a different car, the 2003 Audi S6 and 2002 Audi S6. However, it is still accessible from the selected car via links, so may be relevant.

Increase engine speed to approx. 1800...2400 rpm and use speed adjuster V.A.G 1788/10 to keep the engine speed.

Indicated on display

Fig 1: VAG 1551 Scan Tool Display - Diagnosis Of Secondary Air System (1 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Enter "077" for "display group number 077" and confirm entry with Q key.

Display readout

Fig 2: VAG 1551 Scan Tool Display - Diagnosis Of Secondary Air System (2 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Check specification in display zone 4:

NOTE: Duration of test of catalytic converter diagnosis is approx. 60 seconds.

DISPLAY GROUP 077: DIAGNOSIS SECONDARY AIR SYSTEM (BANK 1)

	Display zones
	1	2	3	4
Display group 077: Diagnosis secondary air system (Bank 1)
Display	xxxx rpm	xx.x g/s	xx %	Test ON
Display	Engine speed	Exhaust gas temperature	Catalyst conversion	Diagnosis status
Range	min.: 550 rpm max.: 7200 rpm			Test OFF Test ON Syst. OK Syst. NOK Cancel
Specified value	1800...2400 rpm	Greater than 14 g/s	-70 %...30 %	Syst. OK
Note:				If "Syst. NOK" is displayed: Check DTC memory. See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING .

If specified value in display zone 4 "Syst OK" is attained:

Press C key.
Press keys 0, 7 and 8 for "display group number 78" and confirm entry with Q key.

DISPLAY GROUP 078: DIAGNOSIS SECONDARY AIR SYSTEM (BANK 2)

	Display zones
	1	2	3	4
Display group 078: Diagnosis secondary air system (Bank 2)
Display	xxxx rpm	xx.x g/s	xx.x %	Test ON
Display	Engine speed	Exhaust gas temperature	Catalyst conversion	Diagnosis status
Range	min.: 550 rpm max.: 7200 rpm			Test OFF Test ON Syst. OK Syst. NOK Cancel
Specified value	1800...2400 rpm	Greater than 14 g/s	-70 %...30 %	Syst. OK
Note:				If "Syst. NOK" is displayed: Check DTC memory . See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING .

If specified value in display zone 4 "Syst OK" is attained:

Press -->key.