D. Servicing injectors with QR code (Reference) When replacing the injector or engine ECU, a HINO diagnostic tool must be used to register ID code in the engine ECU. If the ID code of the installed injector is not correctly registered, it could cause engine malfunctions such as rough idling or noise. a. QR code location Cover QR code (9mm square) '# '# '# '% ID code (30 base 16 characters) Base 16 characters noting fuel injection quantity correction information for market service use. Q000642E b. QR code correction points QR code Pressure parameters Injection volume Q Actuating pulse width TQ Q000468E -8-