This guide walks you through your first diagnostic session with ODIS Service 25 on a VAG vehicle — from connecting the interface to reading fault codes and understanding Guided Fault Finding.
What You Need
- ODIS Service 25 VMware image running in VMware Player
- VAS 5054A or VAS 6154 interface adapter
- A VW, Audi, Seat, Skoda, or other VAG vehicle
- Vehicle ignition key
Step 1: Open ODIS and Create an Order
- Start the VMware VM, pass the VAS interface to the VM, connect to the vehicle OBD2 port
- Open ODIS Service from the desktop
- Click “New Order” — ODIS will prompt you to enter a customer and vehicle
- Enter the VIN manually or click “Read VIN from vehicle” — ODIS auto-fills the vehicle data
- Confirm the vehicle year/model and proceed
Step 2: Run Self-Diagnosis (Full Scan)
Click “Self-Diagnosis” — ODIS scans every installed module in the vehicle. This takes 3–5 minutes on a typical VAG vehicle. You will see a list of all modules found and any fault codes stored in each.
Step 3: Open Guided Fault Finding (GFF)
GFF is what makes ODIS different from all other tools. For any fault code, click GFF to launch the dealer diagnostic procedure. GFF will:
- Ask about current symptoms and driving conditions
- Run automated component tests automatically
- Show live measurement values to confirm faults
- Present a prioritized list of probable causes
- Link to the specific repair instruction for each finding
Step 4: View Live Data
Select any module → Measuring Values to see real-time sensor data. For engine diagnostics, key values are: fuel rail pressure, MAF airflow, boost pressure, fuel trims, lambda (O2) values, injector pulse widths, and EGR position.
Step 5: Module Coding (Basics)
Select a module → Coding. ODIS shows the current long coding string in hex and also provides a coding assistant that explains each byte and bit in plain language. Common coding tasks include enabling/disabling features (e.g., DRL, coming-home lights), adapting replacement modules, and configuring vehicle-specific options.
Always note the original coding before making any changes.
Get ODIS Service 25 + Engineering 19 and start diagnosing VAG vehicles →
