Keyread V20 Mitsubishi Guide

KeyRead V2.0 Mitsubishi (often referred to as KeyReader Tool V2.0

Error 0xE4: "ECU Handshake Failed"

Cause: The Keyread V20 cannot connect to the Immobilizer (IMMO) module. Fix: Check the OBD2 pins. Mitsubishi uses a non-standard CAN protocol on pins 1 and 9 (not the standard 6 and 14). A cheap OBD2 extension cable may interrupt this. Use the direct cable provided with the Keyread V20. keyread v20 mitsubishi

  • A system integrator taking over a project where the previous vendor did not provide the source code or password.
  • Lost documentation for a machine installed >10 years ago.
  • Emergency maintenance requiring online monitoring but the password is unknown.

Content:

Advanced Features for Mitsubishi CNC (M800 Series)

For Mitsubishi’s M800 CNC controllers, KeyRead V20 adds tool-life encryption. Each tool group (e.g., roughing endmill, finishing ballnose) is tied to a specific V20 key. If the operator tries to run a tool without the corresponding key inserted in the KeyRead base unit, the CNC issues alarm #M8190 – “Unauthorized Tool Call” and inhibits spindle start. This prevents use of counterfeit or uncertified cutting tools, protecting both the machine and the final part quality. KeyRead V2

  • D500 = Key presence (0=none, 1=valid, 2=invalid, 3=expired)
  • D501 = Key User ID (4-digit number)
  • D502 = Access level (1=view only, 2=edit temps, 3=full program)
  • D503-D507 = Reserved for future authentication logs.
  1. Practical Tips and Best Practices