. ATTACHMENTS, OPTIONS HANDLING ANTI SKID BRAKE SYSTEM (ABS) 6 - 21 TROUBLESHOOTING This system is equipped with a self-diagnostic and displays an code on the character display of machine monitor. If any action code is displayed , move the machine to a safe place, a nd stop the machine. In addition c heck the code. For details, see"ACTION CODE (PAGE 3-155)". Please contact your Komatsu distributor for repair .
Failure code Type of failure Action DBC0 KK Drop in power source voltage ABS canceled DBC2 KK Failure in the solenoid power source system ABS canceled DLF6 KA Disconnection in wheel rotation sensor (FR) ABS canceled DLF7 KA Disconnection in wheel rotation sensor (FL) ABS canceled dLF8 KA Disconnection in wheel rotation sensor (RR) ABS canceled dLF9 KA Disconnection in wheel rotation sensor (RL) ABS canceled DHU6 KX Failure in ABS control valve pressure sensor (FR) ABS canceled DHU7 KX Failure in ABS control valve pressure sensor (FL) ABS canceled DHU8 KX Failure in ABS control valve pressure sensor (RR) ABS canceled DHU9 KX Failure in ABS control valve pressure sensor (RL) ABS canceled dk11 KX Failure in accelerator sensor ABS canceled DWND KZ Failure in ABS cut valve (F) ABS canceled DWNE KZ Failure in ABS cut valve (R) ABS canceled D1E5 KZ Failure in ABS relay output system ABS canceled DX21 KA Disconnection in ABS control valve (FR) output circuit ABS canceled DX21 KY Short circuit in ABS control valve (FR) output circuit ABS canceled DX21 KB Short circuit with ground in ABS control valve (FR) output circuit ABS canceled DX22 KA Disconnection in ABS control valve (FL) output circuit ABS canceled DX22 KY Short circuit in ABS control valve (FL) output circuit ABS canceled DX22 KB Short circuit with ground in ABS control valve (FL) output circuit ABS canceled DX23 KA Disconnection in ABS control valve (RR) output circuit ABS canceled DX23 KY Short circuit in ABS control valve (RR) output circuit ABS canceled DX23 KB Short circuit with ground in ABS control valve (RR) output circuit ABS canceled DX24 KA Disconnection in ABS control valve (RL) output circuit ABS canceled DX24 KY Short circuit in ABS control valve (RL) output circuit ABS canceled DX24 KB Short circuit with ground in ABS control valve (RL) output circuit ABS canceled DBC9 KM Problem in connector connection ABS canceled DBC3 KK Drop in the battery direct power source voltage Continue ABS control DBC1 KK Drop in the main power source voltage ABS canceled DDD9 KA Disconnection in ABS system switch ABS canceled DDD9 KB Short circuit in ABS system switch ABS canceled DX21 MA Defective ABS control valve (FR) ABS canceled DX22 MA Defective ABS control valve (FL) ABS canceled DWND MA Defective ABS cut valve (F) ABS canceled DX23 MA Defective ABS control valve (RR) ABS canceled DX24 MA Defective ABS control valve (RL) ABS canceled DWNE MA Defective ABS cut valve (R) ABS canceled DX25 MA Defective ABS front wheel system control valve ABS canceled DX26 MA Defective ABS rear wheel system control valve ABS canceled