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.
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HOMESERVICE MANUALSVOLKSWAGEN2002JETTA GLS SEDAN (9M2) L4-2.0L (AVH)REPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLANTILOCK BRAKES / TRACTION CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWABS ITT MARK 20 IE SYSTEMTESTING AND INFORMATION SYSTEM VAS 5051
2002 Volkswagen Jetta GLS Sedan (9M2) L4-2.0L (AVH)
Testing and Information System VAS 5051
2002 Volkswagen Jetta GLS Sedan (9M2) L4-2.0L (AVH)SECTION Testing and Information System VAS 5051
Vehicle Diagnosis, Testing and Information System VAS 5051, connecting and selecting ABS control module
All functions, which could previously be performed with V.A.G 1551 can also be performed with the new tester VAS 5051 in the operating mode "Vehicle On Board Diagnostic":
Operating for Vehicle Diagnosis, Testing and Information System VAS 5051.
Special tools and equipment

VAS 5051 Vehicle Diagnosis, Testing and Information System
Note:
^ The ABS function is switched off in the control module during the On Board Diagnostic.
^ The DTC memory can be erased after successful checking and repair.

^ Pull cover -1- off in direction of arrow.
^ With ignition switched off, connect tester VAS 5051 to diagnosis connection using diagnosis cable VAS 5051/1 or VAS 5051/3.
Note:
^ In the functions 04 - Basic setting 108 Read Measured value block, the display zones will be listed from top to bottom.
^ If the display does not indicate as described in the work sequence:
Operating instructions for Vehicle Diagnosis, Testing and Information System VAS 5051.

Indicated on display
Select operating mode:
^ Press button on display for "Vehicle On Board Diagnostic" -arrow-.

Indicated on display
Select vehicle system:
^ Press "03 - Brake electronics" on display -arrow-.

Displayed is
^ The control module identification number.
e.g. (130 907 379 D)
Allocation of control module
Parts catalog
^ System designation (ABS 20 IE)
^ Data BUS present. (CAN)
Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
^ Control module code (03504).
Coding control module
^ Workshop code
Operating instructions for Vehicle Diagnosis, Testing and Information System VAS 5051.

Indicated on display
Select diagnostic function:
At this point all diagnostic functions are available.
For further measures see repair procedures.
All functions, which could previously be performed with V.A.G 1551 can also be performed with the new tester VAS 5051 in the operating mode "Vehicle On Board Diagnostic":
Operating for Vehicle Diagnosis, Testing and Information System VAS 5051.
Special tools and equipment
VAS 5051 Vehicle Diagnosis, Testing and Information System
Note:
^ The ABS function is switched off in the control module during the On Board Diagnostic.
^ The DTC memory can be erased after successful checking and repair.
^ Pull cover -1- off in direction of arrow.
^ With ignition switched off, connect tester VAS 5051 to diagnosis connection using diagnosis cable VAS 5051/1 or VAS 5051/3.
Note:
^ In the functions 04 - Basic setting 108 Read Measured value block, the display zones will be listed from top to bottom.
^ If the display does not indicate as described in the work sequence:
Operating instructions for Vehicle Diagnosis, Testing and Information System VAS 5051.
Indicated on display
Select operating mode:
^ Press button on display for "Vehicle On Board Diagnostic" -arrow-.
Indicated on display
Select vehicle system:
^ Press "03 - Brake electronics" on display -arrow-.
Displayed is
^ The control module identification number.
e.g. (130 907 379 D)
Allocation of control module
Parts catalog
^ System designation (ABS 20 IE)
^ Data BUS present. (CAN)
Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
^ Control module code (03504).
Coding control module
^ Workshop code
Operating instructions for Vehicle Diagnosis, Testing and Information System VAS 5051.
Indicated on display
Select diagnostic function:
At this point all diagnostic functions are available.
For further measures see repair procedures.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.