ECU diagnostic process important details Of car diagnostic
Almost all electronically governed applications will save you DTCs in ECU ram right after sensor from usual functioning assortment. When issues supervised, they are sent back to be able to ECU, a number of significant issues can cause yellowish or even crimson diagnostic mild about tool screen reduce, as soon as yellowish mild about, electrical power and RPM associated with motor can reduce; as soon as crimson mild about, implies the issue in which sensor discovered is usually significant. In the event that ECU provides quit command perform, and then this perform will be activated. Some electronic command system provides analysis bring about transition, when work this transition, check motor mild about tool screen can blink, regarding car owner and repair pc professional to learn to read flashing DTC. Some electronic command devices need to have work with jumper to be able to brief circuit two terminals in diagnostic connection, to display DTC saved in ECU by means of flashing associated with diagnostic mild associated with tool screen. Picture. 4-35(a)shows a 12-pin diagnostic data connector(DDL), DDL connection normally positioned in pickup truck cab(the particular position dependant upon manufacturer, this is a particular circumstance associated with Detroit DDEC My spouse and i system or even DDEC II system, but DDEC? system and DDEC? system will no longer undertake this kind of connector).
To be able to flashing present DTC, ignition transition are necessary to go out (in OFF) and insert jumper involving airport terminal The and Mirielle that are marked definitely about connection. Picture. 4-35(b)shows among interpreting flashing DTC, acquiring DDEC My spouse and i system or even DDEC II system seeing that case in point, thumb value 13 means coolant degree sensor provides discovered coolant degree also lower, thumb value 7 implies throttle position sensor provides discovered circuit voltage too much.
Pic.4-35
(b). Interpreting DTC that Yellow warning light flashes:
A few automobiles follow electric guitar solar panel, which can specifically study DTC regarding motor. Like Dongfeng Tianjin, which can constantly shows jogging situation regarding motor along with automobile to be able to motorist, such as screen Instantaneous fuel consumption inside unit regarding KM/L. While DTC is useful to see wrong doing, if need to have more analysis regarding system DTC or even wrong doing component, diagnostic info followers utilised by different motor producers are very different, however, many significant diagnostic products producers by now can easily offer wide-spread diagnostic device which relates to different search engines.
Such as Fcar Truck Diagnostic equipment(see Pic below)
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