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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> Fuel Supply (Fuel System EVAP Leak Test) >> 20 Fuel Supply >> Fuel System EVAP Leak Test >> Evaporative Emissions Tester:KLI9210, General Information >> Evaporative Emissions Tester:KLI9210, Self-Test

Evaporative Emissions Tester:KLI9210, Self-Test

NOTE:

Always perform system self-test of Evaporative Emissions Tester :KLI9210  prior to use to ensure that there are no leaks.

Refer to Evaporative Emissions Tester :KLI9210  instruction manual for specific instructions.

-- Connect vehicle interface hose to self-test port -1-, ensuring that fitting is finger-tight. Over-tightening will damage fitting.

Fig 1: Connect Vehicle Interface Hose To Self-Test Port
GWWUS20-A160Courtesy of AUDI OF AMERICA, LLC

-- Turn control valve -2- to Test.

Gauge -3- should read 14 ± 1 in. of water.

If gauge does not read 14 ± 1 in. of water:

-- Verify that valve on EVAP tester nitrogen cylinder is open and that cylinder has sufficient pressure before continuing.

-- Turn fine adjust regulator knob (-arrow-) until gauge reads 14 in. of water; tighten lock nut.

Fig 2: Turn Fine Adjust Regulator Knob Until Gauge Reads 14 In. Of Water
GWWUS20-A161Courtesy of AUDI OF AMERICA, LLC
NOTE:

If gauge still does not read within above range, contact K-Line Customer Service - Technical Support for additional instructions before continuing.

-- Check flow meter -4-.

Fig 3: Connect Vehicle Interface Hose To Self-Test Port
GWWUS20-A160Courtesy of AUDI OF AMERICA, LLC

Meter must indicate no flow.

-- Turn control valve to Hold position.

-- Check gauge.

Gauge must hold pressure.

If gauge leaks down:

-- Verify that vehicle interface hose is firmly seated and repeat previous six steps before continuing.

If gauge continues to leak down:

-- Use ultrasonic tester to locate and repair leak before continuing. Refer to METHOD 2: LOCATE LEAK WITH ULTRASONIC TESTER 

NOTE:

If the leak cannot be located or repaired, contact K-Line Customer Service - Technical Support.