KONNWEI ABS SRS Transmission Engine Fault Reader KW350 – Full System OBD2 Diagnostic for SEAT, Skoda, Audi, and VW

Introduction – what is KW350?

KONNWEI KW350 is a full system scanner specifically developed for the VAG platform (VW/Audi/Skoda/SEAT). It can read/clear fault codes, display live data, and perform functional tests in up to 101 control units on compatible VAG models – everything from engine and transmission to comfort and body modules. For universal engine diagnostics, there is a complete OBD2 mode that works on most OBD-II vehicles.

Unlike simple code readers, the KW350 offers VAG-specific service functions (oil reset/EPB/throttle/BEM), deeper system access via TP-CAN and UDS, and fast protocol auto-detection. The result is a smooth, portable, and affordable tool for home mechanics, car dealers, and workshops with a VAG focus.

Specifications (bullet list)

• Model: KONNWEI KW350
• Display: Backlit 128×64 px with contrast adjustment
• Operating/storage: 0–60 °C / −20–70 °C
• Power: 8.0–18.0 V via car battery (DLC), no internal power required
• VAG protocols: KWP1281, KWP2000, TP-CANBUS, UDS
• OBD2 protocols: ISO 9141, KWP2000, SAE J1850 VPW/PWM, ISO 15765-4 CAN
• Supported systems (VAG): Engine, Transmission, ABS, SRS/Airbag, Climate/HVAC, Comfort/Body, Instruments, Gateway, TPMS* etc. (*model dependent)
• Special functions (VAG): Oil Reset, Throttle Learning, EPB/Brake Pad Service, Battery Matching (BEM)
• Unit languages: English, German
• Housing: Durable handheld casing
• Size/weight: Compact and light (portable in included case)

Functions & applications

• Full system for VAG: Scanning of up to 101 control units – read/clear DTCs, live data, adaptations* (*module dependent).
• OBD2 universal: DTC, live data, freeze frame, I/M readiness, O2 test, Mode $06, VIN/CALID/CVN.
• Service: Oil change reset, EPB/"Brake Pad Replacement", Throttle learning, Battery coding (BEM).
• Fast use: Auto-detection of protocols, clear display, logic with warning icons.
• Portable: Power via DLC – ready in seconds without PC or app.
• VAG model support: Passat, Golf, Tiguan, Touareg, Jetta, A-series, Q-series, Superb, Octavia, Leon, Ibiza, etc. (see examples below).

VAG systems & special functions

Examples of menu groups

• MENUCOMM: Engine, Auto Transmission, ABS Brakes, Auto HVAC, Central Electronics, Airbags, Steering Wheel, Instruments, etc.
• MENUDRIV: Engine, Diesel Pump, AWD, etc.
• MENUCHAS: ABS, Suspension/Electronics, Chassis Control, Steering Assist, Tire Pressure, etc.
• MENUCOMF: HVAC, Position Sensing, Steering Wheel, Auxiliary Heat, Lane Change, Central Convenience, etc.
• MENUELEC1/2: Immobilizer, Instruments, CAN Gateway, Navigation, Media, Data Transfer, etc.

Special functions (VAG)

• Oil Reset: Reset service indicator after oil change according to the car's interval strategy.
• Throttle Learning: Initialize/adapt throttle position (ETC) after cleaning/replacement.
• EPB/Brake Pad Replacement: Put electric parking brake in service mode, freeze/reset piston and calibrate.
• Battery Matching (BEM): Register new battery in energy management system (model dependent).

Note: Access and functions vary with model year, engine/generation, and control unit software.

Protocols & compatibility

VAG vehicles (examples, not exhaustive list)

• VW: Golf/Plus, Passat/CC, Tiguan, Touareg, Polo, Scirocco, Sharan, Touran, Jetta, Caddy, Amarok, Up!, Beetle, etc.
• Audi: A1–A8, TT, Q2/Q3/Q5/Q7/Q8, RS models (RS 3–7, RS Q3, RS Q8, TT RS), etc.
• Skoda: Fabia, Octavia, Superb, Roomster, Yeti, Rapid, Citigo, etc.
• SEAT: Ibiza, Leon, Arona, Ateca, Tarraco, Mii Electric, etc.

OBD2 (universal engine diagnostics)

Supports OBD-II/EOBD according to ISO 9141, KWP2000, SAE J1850 VPW/PWM, and ISO 15765-4 CAN. Regional guidelines: USA 1996+, EU petrol ≈2001+, EU diesel ≈2004+ (exceptions occur). Requires 16-pin DLC and 12 V electrical system.

Manual & installation guide (step-by-step)

A. Preparations & safety

1. Park safely, turn off engine and ignition. Engage P/handbrake.
2. Locate the OBD socket (DLC) – usually under the dashboard near the driver's seat.
3. Ensure battery voltage is normal (≥12.2 V) for stable communication.

B. Quick start – OBD2 (all brands)

1. Connect KW350 to the 16-pin DLC; the unit powers on from the car's voltage.
2. Turn ignition to ON (engine OFF) for initialization.
3. Select OBD II in the menu → wait for protocol establishment.
4. Read Codes: Read current/stored/pending DTCs + DTC definitions.
5. Freeze Frame: Save snapshot (ECT, RPM, Load, trims, etc.).
6. I/M Readiness: Inspection check (Ready/Not Ready).
7. Live Data: Display PIDs (MAF, MAP, O2, trims, ECT, IAT, RPM). Start engine if needed.
8. Rectify cause → Erase Codes → test drive to set monitors to Ready.

C. Full system – VAG

1. Select VAG Diagnosis → select make/model/year (or let the tool identify via gateway if possible).
2. Select system group (e.g., MENUCOMM/MENUDRIV/MENUCHAS) and then control unit (ECU).
3. Read/Erase DTC: Read/clear fault codes by system.
4. Live Data/Measuring Blocks: Display real-time values per module.
5. Output/Basic Settings/Adaptation: Perform functional tests or adaptations where the ECU supports it.

D. Special functions (VAG)

1. Oil Reset: Follow on-screen prompts – confirm oil change, select interval definition (model dependent).
2. EPB/Brake Pad: Put EPB in service mode, freeze/reset piston, perform pad replacement, finish with recalibration.
3. Throttle Learning: Perform basic setting/adaptation after cleaning/replacement.
4. BEM: Register new battery (capacity/type/serial number) in energy management for models that require it.

E. Conclusion

1. Turn off ignition, disconnect KW350.
2. Store in the included nylon bag – ready for next use.

Workflows & practical scenarios

1) Airbag light (SRS) is on

• VAG → SRS/Airbag: Read DTC, note component (e.g., sensor circuit, connector under seat).
• Check wiring/connectors (safety regulations!), fix the fault.
• Erase DTC and verify that the light turns off after self-test.

2) EPB service during pad replacement

• Special → EPB: Put EPB in service mode (piston retraction). Replace pads according to workshop method.
• Finish with EPB reset/calibration. Check for fault codes.

3) Oil change & interval

• Special → Oil Reset: Select model/setting. Confirm change date/mileage, reset service indicator.

4) Rough idle after throttle body cleaning

• Special → Throttle Learning: Perform basic setting. Verify stable idle in live data (RPM/MAF).

5) Battery replacement with energy management

• Special → Battery Match (BEM): Register new battery with correct specifications; reset incorrect SOC values.

Tips & best practices

• Document before clearing: Save DTCs and Freeze Frame/live data before erasing faults.
• Limit PIDs: Select 6–12 key values for faster refresh rate and clearer interpretation.
• Stable voltage: Maintain charge on weak batteries – low voltage can cause communication interruptions.
• VAG variations: Feature availability depends on module/model year/market – some functions may be locked.
• EPB safety: Use wheel chocks, follow torque and safety procedures when working with brakes.
• Combine tools: For a wider range of options – see fault code readers.

Frequently Asked Questions (FAQ)

1. Does KW350 only read VAG?

Full system diagnosis applies to VAG (VW/Audi/Skoda/SEAT). OBD2 engine diagnostics works on most OBD2 cars regardless of brand.

2. Does it support Swedish language menus?

The unit comes with English and German. Messages/reports are general and easy to understand even without Swedish menus.

3. Can I code/change parameters?

KW350 focuses on read/clear, live data, tests, and VAG service. Coding/special adaptations are module and tool dependent.

4. Does EPB service mode work on all VAG?

Most vehicles with electric parking brakes are supported, but exact steps vary by model/model year. Follow on-screen instructions.

5. Why can't I connect to certain control units?

Check ignition status (ON), battery voltage, fuses, and that the car uses supported protocols. Some older/uncommon modules may vary.

6. Can I clear airbag faults after repair?

Yes, read and address the cause first (e.g., connector/spiral cable/sensor). Then clear the DTC and check that the light turns off after self-test.

7. Can I use KW350 on 24 V vehicles?

No. Operating voltage is 8–18 V (12 V vehicles).

8. Where can I find more scanners?

See our category fault code readers for alternatives.

Package Contents

• 1 × KONNWEI KW350 Full Function Car Scanner
• 1 × 16-pin OBD cable
• 1 × USB cable
• 1 × Nylon bag
• 1 × User manual (English)

Important Notes & Disclaimer

• Function access: Varies between control unit/model year/market. Not all functions are available in all cars.
• System scope: Full system applies to VAG. For other brands, OBD-II (engine/emission) applies.
• Safety: Follow vehicle manufacturer's service instructions. Work safely, especially with SRS/airbag and brakes.
• Voltage: Use on 12 V vehicles (8–18 V). Not for 24 V heavy traffic/J1939.
• Data responsibility: Diagnostic data is a basis for decision – verify with applicable measurements and test drives.

Explore more OBD tools in the fault code readers category.

Summary

KONNWEI KW350 combines VAG full system (ABS/SRS/Transmission/Engine, etc.) with OBD2 engine diagnostics in a portable package. With support for KWP/TP-CAN/UDS, four VAG service functions (Oil Reset, Throttle, EPB, BEM), and a clear display, you can solve common service tasks and troubleshooting quickly and safely. Perfect for VAG owners, dealers, and workshops who want great value for money. 🔧

NOTE, not all functions are available on all car models.