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2014 Fcar Newest universal Gasoline and Diesel Heavy Duty Truck Auto Diagnostic Scanner


Fcar Technology Co., Ltd mainly production and sell professional auto diagnostic and maintenance tools export around the world. brand product include F3-W Gasoline auto diagnostic tool, F3-D diesel car diagnostic scanner,F3-G diesel gasoline vehicles diagnostic equipment,we provide good after-sale service and technical support.Details please visit: ——www.fcar.com
 

How to use fcar f3-d heavy duty tool solve Man Engine poor acceleration


By fcar at 2014-09-30 03:14:38
MAN Vehicle mode: MAN

Date of manufacture: June, 2000

Driving : 645201KM

VIN:WMAT31ZZZYM303495

Fault phenomenon: This vehicle dirving powerless, engine unable to accelerate, EDC light on.

Fault diagnosis: This vehicle is electronic control system, to diagnose with Fcar F3-D heavy duty scanner,connect testing cable to test head and main unit respectively,(diagnostic plug is above relay box besides center console).



Diagnostic socket

Pic.1 Diagnostic socket position






In the case of without 37-pin diagnostic connector,you can use jumper box to connect and diagnose.Jumper method see table 1,connect testing cable respectively with jumper box and main unit of F3-D heavy truck diagnostic tools.Turn ignition switch to ON gear position,swtich on power switch of Fcar heavy duty truck tools.Entry to menu 【Diesel】—【MAN】—【V5.3】—【BOSCH EDC MS5/M(S)5】—【Read DTC】,Fault display ”87 intake pressure sensor fault””85 coolant temperature sensor fault” 【Clear DTC】display“System clear success”in【Read DTC】“87 intake pressure sensor”“85 coolant temperature sensor”appear again,DTC cannot be cleared Selct menu【Read data stream】on menu and click to enter and check(Readout data see Table 2).To analyze the specific faulty part combining with data stream.



































Name

Jumper box jack label

Diagnsotic socket label

Diagnostic socket voltage V 

Positive

VCC

A

24V

Negative

GND

D

0V

Signal K

15

Z

23V

Signal L

7

a

23V

Table 1 Connection of Jumper box with diagnostic socket



Fault Analysis

Pic.1 Engine coolant temperature sensor


To analyze according to reading data stream, the vehicle engine still cold water temperature sensor data stream is 95 degrees, the intake pressure sensor data 120kPa. Start the engine, after idle for some time no change in water temperature data, depresses the accelerator pedal to increase engine speed, view the data stream, intake air pressure sensor data is still 120kpa unchanged, indicating that the water temperature sensor and intake air pressure sensor data is abnormal (see data stream of this vehicle in Table 2, Table 3 are data stream that has some changes), initially judge water temperature sensor and intake air pressure sensor part is defective.



Pic.2 Engine coolant temperature sensor



Check water temperature sensor and intake air pressure sensor, both of which were found abnormal, to be replaced.





























Sensor name

High speed

Idle

Static

Water temperature sensor°

95

95

95

Inlet pressure sensor kpa

120

120

120

Engine speed rpm

1900

730

0



Inlet pressure sensor position

Table 2 data stream of this vehicle






























Sensor name

High speed

Idle

Static

Water temperature sensor

85

85










Pic. 3 Inlet pressure sensor position

28

Inlet pressure sensor kpa

600

200

100

Engine speed rpm

1900

730

0

Table 3 changed data stream             

Troubleshooting


Replace water temperature sensor see Pic.2,inlet pressure sensor see Pic.3.Use menu on Fcar truck diagnostic tools menu to clear DTC,display clear success,Read DTC,system normal,road test,fault disappear,completely remove fault.

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