Functional check

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Connect VAG 1551/1552 Scan Tool.

Start engine and let idle.
Press buttons -0- and -1- to select "Engine electronics" address word 01.

Fig 1: Identifying Display Select Function XX

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Display will appear as shown

Press buttons -0- and -4- to select "Basic setting" function 04.
Press -Q- button to enter input.

Fig 2: Identifying Scan Tool Display: Basic Setting
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Display will appear as shown

Press buttons -1-, -5- and -3- buttons to select Display group 153.
Press -Q- button to enter input.

Indicated on display (1 to 4 = Display fields)

Run engine at idle speed (800 -880 RPM) and check specifications after 60 seconds.

Fig 3: Identifying Scan Tool Display: Display Group 153

Courtesy of VOLKSWAGEN OF AMERICA, INC.

DISPLAY GROUP 153: EVAPORATIVE EMISSIONS SYSTEM, CHECKING

	Display fields
	1	2	3	4
Indicated	Engine coolant temperature	Intake air temperature	Leakdown pressure/time	On Board Diagnostic (OBD)
Spec.	5° to 80° C	5° to 45° C	Min. 1.6 sec.	xxxxx100

Press -->button.