USER MANUAL

AFM/DFM Disabler

www.vdiagtool.com (Applicable Models: G100)

EN

Safety Information

To ensure your safety and prevent damage to the device or vehicle, please carefully read and follow all instructions in this manual before use.

When operating the device, always verify proper testing procedures and strictly adhere to the instructions provided. As automotive electrical systems may vary, you must assess potential risks and ensure a safe testing environment.

Always observe all safety warnings, use appropriate tools, and disconnect power sources when necessary. Improper operation may result in personal injury, equipment damage, or voided warranty.

Safety Messages

Safety messages use standardized signal words to indicate hazard levels and prevent inju- ries or equipment damage:

DANGER

Will result in death or serious injury if ignored

Indicates an immediately life-threatening hazard.

WARNING

Could result in death or serious injury if ignored

Indicates a potentially dangerous situation.

Safety Instructions

This manual covers known safety hazards, but cannot anticipate all possible risks. You are responsible for ensuring safe operating conditions and procedures.

WARNINGS

Always conduct testing in a safe, controlled environment.

• This  product  is  only  compatible  with  specified  vehicle  models.  Use  on  incompatible models may cause engine malfunctions, warning light illumination, etc. Please do not use it improperly.

• This product may cause increased fuel consumption during use, which is normal. Users seeking better fuel economy should use it with caution.

• Do not immerse the product in water, oil, or other liquids. Avoid severe impacts or expo- sure to high temperatures to prevent damage.

• Keep all objects away from moving or hot engine components.

•  Secure  the  vehicle   in  PARK  (automatic)  or   NEUTRAL  (manual)  with   parking  brake engaged.

• Place wheel chocks and never leave the vehicle unattended during tests.

• Exercise extreme caution around ignition systems - hazardous voltages are present.

• Maintain an ABC-rated fire extinguisher within immediate reach.

• Never operate test equipment while driving - focus solely on testing.

• Strictly follow the vehicle service manual's diagnostic procedures.

• Verify full battery charge and secure DLC connections before testing.

• Never place test equipment near the distributor due to EMI risks.

Trademarks

VDIAGTOOL is a registered trademark of Shenzhen VDIAGTOOL Technology Co., Ltd in   the United States and other jurisdictions. All other product names mentioned herein may be trademarks of their respective owners.

Copyright Information

© 2017 Shenzhen VDIAGTOOL Technology Co., Ltd. All rights reserved.

No reproduction, distribution, or transmission of this manual is permitted without express written authorization from VDIAGTOOL. This prohibition applies to all forms of copying

including electronic, mechanical, photocopying, and recording.

Disclaimer & Liability Statement

Product Documentation Notice

All illustrations, specifications, and technical data in this manual are for reference only and subject to change without notice.

For the latest documentation, visit: www.vdiagtool.com/support/downloads

Limitation of Liability

VDIAGTOOL expressly disclaims all liability for:

• Any direct, indirect, incidental, or consequential damages

• Loss of profits or business interruption

• Product modifications or unauthorized use This manual does not:

• Modify existing purchase/lease agreements

• Create additional liabilities for VDIAGTOOL

• Constitute additional product warranties

IMPORTANT:

Always consult this manual before operation, with special attention to all safety warnings. VDIAGTOOL reserves the right to modify product specifications at any time.

Product Support & Training Resources

Technical Support

• Official Website: www.vdiagtool.com

• Support Email: support@vdiagtool.com

• US Hotline: +1-213-355-7171

• Online Form: https://www.vdiagtool.com/support/tech-support

Training Videos

Free product operation videos:

1. Visit Training Center: https://www.vdiagtool.com/support/training-center

2. Select Diagnostic Tools category

3. Watch model-specific tutorials

Table of Contents

1. General Information   1

1.1 Device Description   1

1.2 Core Features   1

1.3 Technical Specifications   1

2. Installation Guide   1

3. Compatible Car Models   2

4. FAQ & Troubleshooting   3

5. Maintenance   3

6. Warranty   3

7. Contact Us   4

1. General Information

VDIAGTOOL AFM & DFM disabler will keep your GM vehicle in V6/V8 mode at all times, preventing it from disabling any cylinders. This will give your truck more power & perfor- mance while also reducing the likelihood of the dreaded lifter failure and ticking noise.

1.1 Core Features

•    Increased  Performance  &  Engine  Response:  This  device  prevents  the  engine  from switching between V4 and V8 modes, which can lead to a smoother and more consis- tent power delivery.

•    Ultra-Low Power Sleep Mode: This AFM/DFM Disabler adopts advanced microproces- sor chip. After you turn off the vehicle, the unit will automatically switch into 0.03mA ultra-low power sleep mode.  It can stay  plugged  in for weeks continuously without draining your car battery.

•    Plug-and-Play: No programming, wiring modification or special tools required. Simply plug into the vehicle’s OBD-II port to disable AFM/DFM instantly.

•    Undetectable  &  ECU-Friendly: VDIAGTOOL AFM  &  DFM disabler does not rewrite or flash factory ECU data. Before warranty or dealership visits, you can simply remove the device without leaving any trace and won’t have any issues with voiding your warranty.

1.2 Technical Specifications

2. Installation Guide

(1) Locate the vehicle's DLC (typically under dashboard)

(2) Connect AFM/DFM Diasbler to DLC

(3) Insert the key and start the engine.

•     If the device’s green LED stays solid on and no warning lights illuminate on the dashboard, it indicates good communication with the car. Now, enjoy the V8 / V6 driving experience

•     If a check engine light appears, turn off the engine immediately and recheck the connec- tion. Contact customer support if the issue persists.

Note: If you don't drive fora long time, please unplug the device

Typical DLC Locations:

• Most vehicles: Within 12 inches of the dashboard center, typically under or near the driver’s side.

• Some Asian/European models: Behind the ashtray (may require removal for access).

• If not visible: Check for a location label or consult the vehicle’s service manual.

3. Compatible Car Models

4. FAQ & Troubleshooting

5. Maintenance

•    Keep the device dry and clean. Wipe dust off the surface with a soft dry cloth. Do not clean with corrosive liquids such as alcohol or gasoline.

•    Do not disassemble or modify the device. Unauthorized disassembly will void the war- ranty and may cause circuit damage.

•    Store in a cool, dry place away from high temperature and humidity when not in use.

6. Warranty

Limited 12-Month Warranty

This warranty is expressly granted to buyers who purchase the VDIAGTOOL product for resale or for use in the ordinary course of their business.

VDIAGTOOL warrants that the AFM/DFM Disabler shall be free from defects in materials and workmanship for a period of one year (12 months) from the date of delivery to the original buyer.

This warranty does not cover any part that has been subjected to misuse, alteration, used for unintended purposes, or operated in a manner inconsistent with the product instruc- tions. The exclusive remedy for any tool found to be defective under this warranty shall be, at VDIAGTOOL’s option, repair or replacement of the product. VDIAGTOOL shall not be liable for any consequential or incidental damages arising from the use or inability to use the product.

7. Contact Us

Warranty & Support

Email: support@vdiagtool.com

Website: www.vdiagtool.com

For wholesale business or become our distributors:

Email: sales@vdiagtool.com

Invent with us, test products before they hit market, help us make better products for everyone:

Email: inventers@vdiagtool.com

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Email: marketing@vdiagtool.com

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