FAILURE DIAGNOSIS1-216 TNV DI Service ManualFactor Analysis2G-Type Eco-Governor Black Smoke Factor AnalysisNo. Check method Relevant DTC Remarks1 Black-smoke emissionfrom engine Insufficient fuel supply Fuel pipe clogging Check fuel system.2 Engine failure Nozzle failure etc. Check whole engine.3 Working machinefailureLoad fluctuation inworking machineCheck whole workingmachine.4 Fuel pump failure Unstable injection dueto defective rack etc. Check fuel pump.5 CSD solenoid valvesystem failureWire breakage or short-circuit in CSD solenoidvalveCheck conduction of CSD.CSD solenoid valve systemerror: P1242/4, P1243/3,P1244/26Wire breakage or short-circuit in harness, orconnector contactfailureCheck error occurrence, tooldata, harness shaking, andconduction with tester.CSD solenoid valve systemerror: P1242/4, P1243/3,P1244/27 EGR step motorsystem failureWire breakage or short-circuit in ECR stepmotorCheck conduction of ECR stepmotor.ECR step motor system error:P1402/4, P1403/3, otherphase errors8Wire breakage or short-circuit in harness, orconnector contactfailureCheck error occurrence, tooldata, harness shaking, andconduction with tester.ECR step motor system error:P1402/4, P1403/3, otherphase errors9 Rack actuator systemfailureRack actuatormalfunction due toexcessive hysteresisetc.Check rack actuator operationand hysteresis.Rack actuator system error:P1212/4, P1213/3, P1211/710Wire breakage or short-circuit in harness, orconnector contactfailureCheck error occurrence, tooldata, harness shaking, andconduction with tester.Rack actuator system error:P1212/4, P1213/3, P1211/711 Atmospheric-pressuresensor system failureWire breakage or short-circuit in atmospheric-pressure sensorCheck error occurrence, tooldata, and conduction withtester.Atmospheric-pressure sensorsystem error: P2228/4,P2229/3, P2230/212Wire breakage or short-circuit in harness, orconnector contactfailureCheck error occurrence, tooldata, and conduction withtester.Atmospheric-pressure sensorsystem error: P2228/4,P2229/3, P2230/2