Breakdown phenomenon: Kang Mingsi 6 crocks of countries 4 LSDe in all course engine aftertreatment signs up for " short circuit of sensor of temperature of EGP imports and exports or open a way " and " temperature of EGP imports and exports differs exorbitant " breakdown.
Join diagnostic appearance reads take malfunction code to be respectively: "Short circuit of sensor of temperature of EGP imports and exports or open a way " and " temperature of EGP imports and exports differs exorbitant " , two breakdown are active breakdown, cannot disappear code, the aftertreatment system that judges engine from this is put in breakdown.
"EGP " those who point to is derv electronic-controlled in all course country component of processor of 4 tail gas, namely the belt that our day Changshu weighs catalysis implement muffler. Jacket of tail gas processor has 2 catalysis implement temperature sensor and sensor of a NOX, two temperature sensor is in catalysis implement entrance and exit, call entrance and outlet temperature sensor respectively. Their main effect is to detect the temperature in engine eduction waste gas, should detect when the temperature in exhaust achieves 200oC above, of engine electronic-controlled and unit receive this signal, the urea juice that sends relevant executive signal statement to control nozzle eject to be measured certainly to metric jet centrifugal pump arrives inside vent-pipe, urea fluid encounters pyrolysis to be NH3, the NOX in NH3 and waste gas produces chemical reaction to generate the N2 of free from contamination and HO2.
"Short circuit of sensor of EGP inlet temperature or open a way " those who point to is two temperature sensor is medium a certain or the in-house component breakdown that two temperature sensor puts in circuit and sensor itself at the same time, ECM did not receive this signal value to be able to sign up for this malfunction code, producing this breakdown is circuit short circuit or open circuit or temperature sensor breakdown likely. Check the two temperature sensor on EGP, discover they and photograph of automobile body crossbeam are built one case, damaged of sensor insulation skin, cause cupreous core to take iron.
Breakdown case study: The clip code that uses fixed EGP via checking discovery becomes loose, car is be expert at when sailing, EGP shift and crossbeam photograph are touched. And because maintenance was versed in a bigger than bolt diameter nut is added to should do smooth gasket when installing nut,main reason is, and nut still is not cooperate to install with the spacing chamfer of fixed axis. Change two temperature sensor, breakdown is solved.
Complement wants a place:
1, key switch is in " ON " when archives, the voltage value of two temperature sensor is 4.98 bend over to control.
2, working temperature limits: - 40, 850oC
