How to Activate ECU Flash on Launch X-431 Heavy-Duty Truck Scanners

This guide explains how to purchase, enable, and activate the ECU Flash function for commercial vehicles on Launch X-431 truck diagnostic tools.

✅ Supported Launch X-431 Truck Scanners

🚚 What the ECU Flash Function Covers

The ECU Flash function supports a wide range of commercial vehicle systems, including:

🔧 Engine ECUs:

  • Cummins: Full-range ECU read/write (China III–VI)
  • Bosch:
    • ECU flashing for China III–VI engines
    • Boot mode (low-level) flashing
    • Cross-version flashing without hardware removal
  • Delphi:
    • Unit pump ECU flash
    • Engine data flash (China III–VI)
  • Denso: Hino, Shanghai Diesel, Wuxi Diesel, Dongfeng, Sinotruk
  • Weichai / Wuxi Diesel: Complete engine data flashing
  • Yuchai: Proprietary ECU and NG (natural gas) systems
  • Nanyue: Unit pump ECU flash (R01/R02)

🧠 Control Modules:

  • Sinotruk:
    • CBCU / CBCU3
    • BBM, VCU, 2012 cluster models
    • SCR system
  • Foton:
    • BCU, AMT, CBCU3, and instrument clusters
  • Dongfeng Commercial:
    • OEM-grade online flashing
    • China VI compliance

🔋 Natural Gas Systems:

  • Woodward, WPDS, Bosch EGC4
  • Sinotruk-Yuchai-Wuxi Econtrols
  • Yuchai NG and OH6 platforms

🧼 Aftertreatment (DCU) Coverage:

  • Over 20 supported systems:
    • Tenneco, Kelong, Sanli, Dinex, Bosch, ACM, Tianlan, Weifu, and more

🛒 Step 1: Purchase the ECU Flash License

  1. On your X-431 device, open the Mall app.
  2. Go to: Software Store > Commercial Vehicle > ECU Flash.
  3. Complete your purchase and enter the required details.

⚙️ Step 2: Enable the ECU Flash Feature

To activate ECU Flash, you must modify the configuration file on your device.

📁 File Paths:

  • PAD V LINK HD:
    /storage/emulated/0/cnlaunch/X431PADV/assets/StdCfg.ini
  • PRO3 SE HD / PRO3 LINK HD / V+ HD / Pro3s+ HD:
    /storage/emulated/0/cnlaunch/X431Pro3S/assets/StdCfg.ini

📝 Edit Instructions:

  1. Open the File Management app on the device.
  2. Navigate to the corresponding file path above.
  3. Locate and open the file StdCfg.ini using a text editor.
  4. Find the lines: 
    OnlineFlash=0
Flash=0
  5. Change both values to: 
    OnlineFlash=1
Flash=1
  6. Save the file.

Note:
If these lines do not exist, add them at the end of the file manually.

✅ Once saved, the ECU Flash function is activated.

📲 Step 3: Confirm in the Application

After enabling the ECU Flash feature, the following changes will appear:

In the X-431 HD App:

  • “ECU Flash” appears under Local Diagnosis > Manufacturer
  • “ECU Flash Data Management” appears under More

In the X-431 Main App:

  • “ECU Flash” appears under Local Diagnosis > HD > ALL
  • “ECU Flash Data Management” appears under Tools

⚠️ Note: Enabling OnlineFlash=1 and Flash=1 also unlocks the online programming feature (for PAD series).

📋 Step 4: Supported Brands & Systems

ID Category Supported Brands/Systems
X109023558 HD_ECU CBCU, Bosch, Continental, Delphi, Denso
X109023558 HD_ECU Dongfeng Commercial, Foton, Cummins
X109023558 HD_ECU Aftertreatment (SCR/DCU), Jiangling Motors
X109023558 HD_ECU Liaoning Xinfeng, Nanyue, Hino, Sany
X109023558 HD_ECU Natural Gas Systems, WIT, Weichai, Isuzu
X109023558 HD_ECU Qingling, FAW Jiefang, Yikong, Yuchai
X109023558 HD_ECU Sinotruk

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