Breakdown 1
Keyword: Air-blower controls unit
Breakdown phenomenon
Produced car of Lang Yi 1.4TSI 2009, travel course of development 220 thousand Km. The user mirrors this car air-blower to cannot be shut.
Check an analysis
Maintenance technician test-drive discovers, this car should open ignition switch only, air-blower begins the work, cannot shut its already, also cannot adjust rotate speed. Detect air conditioning control is unit, discover malfunction code 00732 -- air-blower V2 breakdown, static state.
Consult the data is informed, the air-blower of this car is by air-blower control unit J126 is controlled directly, but control instruction controls unit J255 to give out by air conditioning. Disconnect air conditioning control is unit, air-blower still is turning, and rotate speed is changeless, explain the problem gives the share after air conditioning controls unit. Disconnect next air-blower control is unit, air-blower stops instantly turn, the specification is attaint of air-blower control unit.
Trouble removal
Change air-blower control is unit, trouble removal.
Breakdown 2
Keyword: Engine controls unit
Breakdown phenomenon
Produced POLO strong feeling 2010 car, travel course of development 170 thousand Km. The user mirrors lamp of trouble of this car engine to shine.
Check an analysis
Maintenance technician detects engine control is unit, discover malfunction code P1639 -- solar term door / the signal that quickens footplate position sensor is fluky. The examination discovers solar term door is too dirty, clean solar term door and do initialization, test-drive discovers fault or meet now and then appear. After classics user agrees, changed to quicken footplate position sensor. Test-drive breakdown appears no longer at that time, make a car then.
Repair of the car after half month, malfunction code and last time identical. Considering solar term the door and the problem that quicken footplate can eliminate, because this decision enlarges the limits of the examination. Engine idle observes data flows when fast movement, 2 data that 2 report after discovering 62 groups of data are medium quicken footplate position are unequal (graph 1) . Consult the data is informed, these 2 data should are equal below normal circumstance.
Graph the data when 1 breakdown
Quickening footplate and engine control there is to turn between unit receive implement, those who be located in rain to blow join lever below. Tear open rain blow implement reach relevant part, check connector, discover its position is good, and with engine control unit is mixed quickly between footplate position sensor guide electrify block is very small, explain circuit is normal. Can suspect engine controls unit only so. But because do not have fittings, can control unit to do with other vehicle engine first only so replace an experiment. The test-drive after replacing, 2 data after discovering 62 groups all are 14% (graph 2) , try car breakdown to appear no longer repeatedly.
Graph 2 normal the data when
Trouble removal
Change engine control is unit, trouble removal.
Breakdown 3
Keyword: Crankcase connects air-valve
Breakdown phenomenon
Produced POLO car 2010, travel course of development 130 thousand Km. The user mirrors this car idle fast wave motion.
Check an analysis
Maintenance technician test-drive discovers, the idle when this car cold vehicle fast normal, the idle after temperature is elevatory fast fluctuate in 680 ～ 1000r/min, but the road tries a feeling to quicken good. Detect engine control is unit, without malfunction code. Idle fast when stem with the hand solar term door, engine flameout is relatively slow, and there still is brief inspiratory reputation after flameout, explain existence of the system that take energy of life is flat.
The examination enters gas manifold and port, did not discover damaged. Examination crankcase connects air-valve, feel place of alveolus of brim of a powerful person has attraction. Stem alveolus, engine idle fast stabilized immediately. Tear open enlightened air-valve to check, discover the balata diaphragm inside a powerful person because of sufferring greasy filth to corrode ageing craze, because this air was entered from here,enter gas manifold.
Trouble removal
Change crankcase connects air-valve, test-drive trouble removal.
Breakdown 4
Keyword: Block a switch
Breakdown phenomenon
Produced Pasate 2010 domain car, travel course of development 180 thousand Km. The user mirrors this car to block without show.
Check an analysis
Maintenance technician detects transmission control is unit, discovery has the clew of breakdown of circuit of sensor of position of shift gears staff. Test-drive discovers this car is in protective mode, transmission not shift gears. Browse circuit graph is informed, block a sensor F125 and transmission to control unit J217 to be linked together directly. The relation between the connector T10x of F125 and the connector T88 with transmission unit control is: T10x/1 and T88/55 and T88/54 join, t10x/2 and T88/36 join, t10x/3 and T88/8 join, t10x/4 and T88/37 join, t10x/5 and T88/9 join. In addition, t10x/7 is 15 power source, t10x /9 join starts relay J207, t10/10 joins with T88/28, T88/34 and T88/6 respectively and take iron.
Measure T10x /7, T10x /1, T88/55 and T88/54 to have 12V voltage, between circuit guide electrify block is in 0.3 Ω less than, showing line is normal, the possibility that damages because of this F125 is larger.
Trouble removal
Change sensor, trouble removal.
