Test requirements

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Engine at idle
Coolant temperature greater than 85 °C (display group 4, display field 3)

Indicated on display

Fig 1: VAG 1551 Scan Tool Display - Diagnosis Of EVAP Canister Purge Regulator Valve (1 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Press buttons -0-, -7- and -0- to select "display group 070" and confirm input with -Q- button.

When indicated on display

Fig 2: VAG 1551 Scan Tool Display - Diagnosis Of EVAP Canister Purge Regulator Valve (2 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Check specified value in display field 4:

NOTE: If test is not initiated or the display jumps from "Test ON" to "Test OFF" slightly accelerate engine briefly, test will be repeated.

DISPLAY GROUP 070: DIAGNOSTIC OF EVAP CANISTER PURGE REGULATOR VALVE

Display fields

Display group 070: Diagnostic of EVAP canister purge regulator valve

Display

xx %

xx.x %

xx %

Test ON

Indicated

EVAP valve duty cycle during diagnosis

Oxygen sensor control deviation during diagnosis

Relative Ground via EVAP valve

Diagnostic condition

Work Range

min.: 0 %
max.: 100 %

min.: -25.0 %
max.: 25.0 %

Test OFF
Test ON
EVAP OK
EVAP n.OK
Abort

Specified value

xx %

-5.0 to 4.0 %

xx - xx % ⁽¹⁾

EVAP OK

Note:

If "EVAP n. OK" is displayed: Check DTC memory. See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING . Check EVAP canister purge regulator valve -N80-. See EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80-, CHECKING .

⁽¹⁾	A display appears only if the diagnostic result occurred via deviation from the Idle Air Control (IAC) in a specified tolerance range and not from deviation from the oxygen sensor control (e.g.: oxygen sensor 1 from EVAP canister). Display field 3 is only indicated if there is a deviation.

If the specified value "EVAP OK" is reached:

Press -C- button