Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSVOLKSWAGEN2002GOLF GLS, 2.0 K, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (1.9L - EXHAUST SYSTEM, EMISSION CONTROLS - ALH (A4 PLATFORM))EXHAUST GAS RECIRCULATION (EGR) SYSTEM, OVERVIEWEXHAUST GAS RECIRCULATION, CHECKINGTEST SEQUENCE

2002 Volkswagen Golf GLS, 2.0 K, Standard

Test sequence

2002 Volkswagen Golf GLS, 2.0 K, StandardSECTION Test sequence

WARNING: This page is about a different variant/trim than selected.

Testing the EGR system is done in function 04 (Basic setting). This procedure activates the EGR valve every 10 seconds to make it possible to read the extreme values for EGR (Mass Air Flow MAF Sensor) in display field 3.

Connect VAG 1551/1552 Scan Tool and select engine control module, address word 01. Engine must run at idle.

See GENERAL INFORMATION FOR ON BOARD DIAGNOSTIC (OBD) .

Indicated on display

Fig 1: VAG 1551/1552 Scan Tool display - Select Function XX

Courtesy of VOLKSWAGEN OF AMERICA, INC.

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

Indicated on display

Fig 2: VAG 1551/1552 Scan Tool display - Basic Setting, Input Display Group Number

Courtesy of VOLKSWAGEN OF AMERICA, INC.

Press buttons -0-, -0- and -3- to select "Display group 3".
Press -Q- button to confirm input

Indicated on display: (1 to 4 = Display fields)

Fig 3: VAG 1551/1552 Scan Tool display - System In Basic Setting 3 (490 mg)

Courtesy of VOLKSWAGEN OF AMERICA, INC.

Display in field 2 must fluctuate every 10 seconds between EGR active or EGR inactive (n.aktiv).

The displays in display fields 3 and 4 must fluctuate within the following control range:

NOTE: If a constant value of 550 mg/H is indicated in display field 3, check Mass Air Flow (MAF) sensor.

See GENERAL INFORMATION FOR ON BOARD DIAGNOSTIC (OBD) .

If EGR NOT active:

Specified value in display field 3: 420 to 560 mg/stroke

Fig 4: VAG 1551/1552 Scan Tool display - System In Basic Setting 3 (490 mg - EGR Not Active)

Courtesy of VOLKSWAGEN OF AMERICA, INC.

Specification in display zone 4: 0 to 5%

If EGR active

Specified value in display field 3: 170 to 340 mg/stroke

Fig 5: VAG 1551/1552 Scan Tool display - System In Basic Setting 3 (225 mg - EGR Active)

Courtesy of VOLKSWAGEN OF AMERICA, INC.

Specification display zone 4: 95 to 100%

Press --> button.
Press buttons -0- and -6- for to select "End output" function 06.
Press -Q- button to confirm input.
Switch ignition off.

If specifications are not obtained:

Check mechanical EGR valve, See EXHAUST GAS RECIRCULATION (EGR) VALVE, CHECKING
Check vacuum hoses, See VACUUM HOSE CONNECTIONS, DIAGRAM

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.