About pin definition of Euro III and Euro IV vehicle engine diagnostic socket

Normally diesel vehicle is 24 V battery voltage. So here take 24V as an example, make a brief introduction about pin definition of Euro III and Euro IV vehicle engine diagnostic socket.

1. Euro III vehicle 

This vehicles usually adopts KWP2000 communication protocol, diagnostic socket is usually 4-pin.Convertion is ground wire, fire wire, K line 1,kK line 2.Use high resistance type digital multimeter under the condition of ignition key on.（Here will not introduce how to use multimeter）,measure the voltage of 4 pins respectively, normally ground wire 0V,fire wire 24V,2 K lines are about 22V(little lower than voltage of fire wire).

Now connect one end of main testing cable to car diagnostic code reader, another end DB15 connect to jumper box. Select the correct jumper according to pin on vehicle, connect ground wire on vehicle to GND on jumper box, fire wire to VCC. 2 K line connect to 7# and 15# jack respectively. Now Power light on jumper box will be seen on, and then select the correct vehicle model menu in automotive diagnostic scanners to enter. If still unable to test, you can contact Overseas Dept. of our company for assisting test.

2. Euro IV model 

This model usually adotps CAN communication protocol (Not excluding some Euro IV vehicles that still adopts Euro III standard, Such as FUSO) Diagnostic socket is normally 4 pins: ground wire, fire wire, CAN_H, CAN_L, voltage measured is: 0V, 24V, 2.5+V, 2.5-V.The pin that little higher than 2.5V

Node relation of jumper box is:

1#：K line； 2#：K line；

3#：K line； GND：Ground wire（negative）；

6#：CAN‐H；

7#：RSR232+, J1708+, K line；8#：K line；

9#：K line； 10#：K line；

11#：K line； 12#：K line；

13#：K line； 14#：CAN‐L；

15#：RSR232‐, K line, J1708‐, L line

VCC: power line（Positive）； POWER：Power indicator.

Remark: If lack of vehicle electrical equipment knowledge or unable to confirm electrical equipment power supply, please don’t operate jumper, for error operation of jumper may lead to malfunction of electrical failure or FCAR F3-D main unit and wire. 

(Auto diagnostic socket related information reconfirmed as below)

● Digital high impedance multimeter (can not use Analog Multimeter)

● When ignition switch to ON Gear, there is supply voltage of vehicle on diagnostic socket. Voltage difference between voltage on diagnostic socket and vehicle battery side can not be above 2.5V.

In diagnosis, if the signal line used is single-line communication (K line), voltage on signal line lower than battery voltage,(if vehicle supply voltage is 12V,then voltage on signal line is 11V, + 0.25V;if 24V,signal voltage is 21V,+ 0.25V)

If double signal line adopts CAN communication, 2 diagnostic lines use multimeter to measure ground wire voltage under the condition that ignition switch open, the sum of both voltages is 5V,average 2.5V,the one voltage little higher than 2.5V is CAN-H, the one voltage lower than 2.5V is CAN-L.

After understanding of the above, then you can use car diagnostic scanners to read DTC. Now make a brief introduction of operation steps for FCAR auto scanner to read DTC: Confirm diagnostic socket connect properly and then turn on power switch of auto scanner, and select Diagnostic menu.

F3S-W automotive diagnostic scanners Introduction and Features

FCAR F3S-W auto diagnostic scanners Introduction:

As professional multi-functional intelligentized automobile diagnostic computer equipment, FCAR Series products follow International Standard Design. With the big color touch screen, high resolution display integrated structural design, single-track working and touch operation etc these special designs make you feel more easily, conveniently and faster during diagnosis. In addition, FCAR F3S-W auto scanner adopts smooth features drive technology and has good extensibility,

Features:

The hardcore follows the international advanced modularized design technology, with the excellent performance of high speed , stability, data collection accurate, etc.

With openning structure design and independent operating system, making the upgrade of system software and diagnostic software more convenient in the furture.

F3S-W auto diagnostic tool working power supply is from Vehicle storage battery which can meet the voltage change between 9~27V. Internal power supply is designed by separating power supply which can avoid products to be damaged when vehicle voltage is abnormal.

Good extensibility, F3S-W car diagnostic scanners communication interface adopts flexible drive circuit which not only can satisfy the current auto bus type test,but also the auto bus type test in the furture. Built-in high and low speed CAN-BUS, to satisfy the CAN-BUS electronic control system vehicles , Just only one diagnostic interface can test all of vehicles with CAN-BUS. F3S-W vehicle diagnostic equipment Support All OBD-II protocols.

Build-in high speed thermal Printer to be convenient to record the data and save Trouble code etc..

Screen follows International standard LED true-color industry touch-screen. It is good guaranteed

under strong sunshine and poor conditions

Multi-language operation edition which can meet different countries and areas demand and use.

OBDII / EOBD uses CAN BUS to diagnose new control system of all engine system

Test procedures of FCAR F3 OBD auto scanner series include European series, Asian series, American series, domestic series, OBDII / EOBD, CANBUS six series.

European series include the mainstream model of European countries.

Asian series include Japan, South Korea and some models of Southeast Asian countries.

American series include part of models of American countries.

Domestic series, including the model of major automotive companies that currently set up factories in China.

OBDII / EOBD uses CAN BUS to diagnose new control system of all engine system.

System Settings

Select the menu 【System settings】with the touch pen at the top of desktop, then appears the sub-menu of the system setting menu.

【System information】

【Touch screen adjustment】

【User information】

【System theme】

【Language setting】

【System activation】

System Information

Select 【System Information】and entered, the OBD readers main menu pop-up dialog box for the hardware information, operating system version, software version, database version, memory information of product in current use. Operating the button【OK】 on the left side of menu to return to previous menu.

Operate 【diagnose】 button on the right side of the menu, then the device will diagnose automatically.

System Diagnosis

This feature is used for checking Fcar F3 OBD readers series whether with hardware problems by operating the 【Diagnosis】 button.

If the main unit hardware failure, then the main menu will prompt the appearance of fault code in testing, According to fault code, you can consult Fcar company after-sales service department to handle it.

Touch Screen Adjustment

This feature is used in the operation of main unit functions, when using touch pen to select the OBD car scanner main menu, the main unit entered is offset with the actual selection of the menu screen the screen deviation needs adjustment. Screen can be adjusted at the time of starting up.

Menu Screen adjustment: In the System Settings menu, select 【Touch screen adjustment】 to enter adjustment procedure, the main unit screen prompts 【Please click cross cursor (the more accurate the better for your adjustment)】. According to the prompts click the cross in turn on the screen with the touch pen. (Cross cursor in the four corners of the LCD screen respectively). After entering the adjustment mode will display the menu.

After adjustment and the main unit shows correct information, log on to the desktop menu.

Note: when can not adjust through the touch screen adjustment menu, you can adjust it at the time of starting up.

User Information

After user purchase equipment, fill in information by themselves: Company name (can fill in company name or individual name), address (to help customers who need repairs easy to find the detailed address), zip code, telephone, fax, support, website, email. Information about the user. After finished input press 【OK】 button to save, press 【Cancel】 button to cancel the save.

Note: when input must first select the right input location.【capital】 in keyboard area of the bottom of the screen is for change case. 【ZhCH】 is for conversion between Chinese and English.【Letters 】 is used for conversion between the letters and numbers. 【Back】 is for user to delete the inputted error character or letter.

System Theme

Used for setting programs menu background . This theme comprise a total of five settings for selection : the classical theme, blue theme, green theme yellow theme, Grey theme, The Setting of the theme is based on working environment to avoid the visual gap between different environments. When setting select the appropriate theme in the system settings dialog, you can click on the small box behind the theme to select, then click on 【OK 】button to save. Press 【Cancel】 button to cancel this operation.

Note: If change the theme on the menu, you need to restart the main unit to make the new theme taken effect.

Language Setting

The menu is used for the setting of the main unit language type. This machine offers four options: simplified Chinese, English, Russian, Traditional Chinese . When setting select the appropriate language in the Language dialog, you can select by clicking on the small box behind the theme, then click【OK】 button to save. Press 【Cancel】 button to cancel this operation.

Note: If change language type on the menu, you need to restart the main unit to have the new language patterns taken effect.

System activation

FCAR OBD II code reader main unit when leaving factory has not been permanently activated, it only can operate 50times use (only after the user purchased, the user can activate the device through FCAR website or Email to FCAR service people. (some customer request to active by FCAR when shipping ).

System active detail method pls ref. 6.1.