Bobcat T770 scr heaters

1. #1tool_king2020-08-13 23:43

   I might .Taking a look .

2. #2tool_king2020-08-14 00:45

   Here are the codes .Only thing code E005246-22 did not come up when entering in it into trouble shooter. Code U004344-05 - DEF Line Heater 4 SCG or Open × Rank P20C1 - DEF Line Heater 4 SCG or Open Detailed Description The power-stage hardware reports a “no load” or “SCG” error  State of Diagnosis load feedback for Circuit 4(Backflow line) is TRUE and Requested actuation for urea heater relay is greater than 0 and Status of circuit 4 power stage is TRUE or  State of Diagnosis load feedback for Circuit 4(Backflow line) is FALSE and Requested actuation for urea heater relay is greater than 0 and Status of circuit 4 power stage is FALSE Inducement Group2 Possible Causes Short circuit to ground or open load of backflow line heater Conditions for Alarm Power-stage is actuated Conditions for Clearing Alarm When no error is detected Note - P20C1 The power-stage hardware reports a “no load” or “SCG” error  State of Diagnosis load feedback for Circuit 4(Backflow line) is TRUE and Requested actuation for urea heater relay is greater than 0 and Status of circuit 4 power stage is TRUE or  State of Diagnosis load feedback for Circuit 4(Backflow line) is FALSE and Requested actuation for urea heater relay is greater than 0 and Status of circuit 4 power stage is FALSE Solution - P20C1 Step Action Yes No 1 P20C1 is occurred on diagnostic tool? Step 2 2 After let the machine be in safety area and turn-off the key switch Step 3 3 Check the DEF line heater connection Connection problem ?Do necessary repair Step 4 4 Check the DEF line heater relay & fuse Relay or fuse problem?Do necessary repair Step 5 5 Check the DCU voltage related pin connection and harness. Pin or connection Step 6 problem? Do necessary repair. 6 Check continuity and electrical insulation Electrical problem? Fix harness Call Hot-line × Rank Code U003511-24 - DCU Actuator Relay 2 SCG Detailed Description The hardware detects a short circuit to ground error on the output UB3 of actuator relay chip Possible Causes Short circuit to ground of actuator relay 2 Conditions for Alarm The switched battery output UB3 must be ON for SCG monitoring Conditions for Clearing Alarm The SCG error is not detected for 1.5s duration, after switching the UB3 again ON. Note - U003511-24 The hardware detects a short circuit to ground error on the output UB3 of actuator relay chip Solution - U003511-24 Step Action Yes No 1 P2685 is occurred on diagnostic tool? Step 2 2 After let the machine be in safety area and turn-off the key switch Step 3 3 After key on, Check the DCU voltage related pin connection and harness. Step 4 Pin or connection problem? Do necessary repair Step 4 4 Check DCU relay and fuse Relay or fuse problem? Do necessary repair Step 5 5 Please replace the DCU. Check the fault state. Is fault clear? Call Hot-line Problem solved Code U004346-05 - DEF Line Heater 5 SCG or Open × Rank U004346-05 - DEF Line Heater 5 SCG or Open Detailed Description The power-stage hardware reports a “no load” or “SCG” error  State of Diagnosis load feedback for Circuit 5(Suction line) is TRUE and Requested actuation for urea heater relay is greater than 0 and Status of circuit 5 power stage is TRUE or  State of Diagnosis load feedback for Circuit 5(Suction line) is FALSE and Requested actuation for urea heater relay is greater than 0 and Status of circuit 5 power stage is FALSE Inducement Group2 Possible Causes Short circuit to ground or open load of suction line heater Conditions for Alarm Power-stage is actuated Conditions for Clearing Alarm When no error is detected Note - U004346-05 The power-stage hardware reports a “no load” or “SCG” error  State of Diagnosis load feedback for Circuit 5 (Suction line) is TRUE and Requested actuation for urea heater relay is greater than 0 and Status of circuit 5 power stage is TRUE or  State of Diagnosis load feedback for Circuit 5(Suction line) is FALSE and Requested actuation for urea heater relay is greater than 0 and Status of circuit 5 power stage is FALSE Solution Solution - U004346-05 Step Action Yes No 1 P20C5 is occurred on diagnostic tool? Step 2 2 After let the machine be in safety area and turn-off the key switch Step 3 3 Check the DEF line heater connection Connection problem. Do necessary repair Step 4 4 Check the DEF line heater relay & fuse Relay or fuse problem? Do necessary repair Step 5 5 Check the DCU voltage related pin connection and harness. Pin or connection problem? Do necessary repair Step 6 6 Check continuity and electrical insulation Electrical problem? Fix harness Call Hot-line