User Manual
Table Of Contents
- Statement
- Chapter I Product Introduction
- 1.1Product Overview
- 1.2Product Features
- 1.3 Service and Maintenance
- 1.4Automobile Inspection Notes
- 1.5 Product Help
- Chapter II Product Structure
- 2.1Host Hardware Instruction
- Chapter III Operation Manual
- 3.1 Connection of Power Supply & Main Testing Cab
- 3.2 Start Interface Menu
- Chapter IV Upgrade
- Chapter V OBD Pin detection
- Chapter VI Compliance Information
- Annex: Diagnostic Interface Definition and Descrip
- Chapter VII Warranty
CanDo HD Diagnostic Tablet
23
After connecting the OBD interface of the vehicle (see section 3.1.2 for
details), select the [Detect Toolbox], click [Start Testing] program to
automatically measure the 16pin voltage of the OBD diagnostic interface,
and judge the pin positions of K line and CAN line, as shown in the figure
below：
The following table shows the common automotive communication
protocols and pin voltage reference range：
Protocol Name
Communication
line name
Reference voltage
range
Pin
K Line
Communication
K
About 1V lower than
the battery voltage
7
CAN Line
Communication
CAN-H(CAN High
）
2.5V+0.25V
6
、
1
、
3
CAN-L(CAN Low
）
2.5V-0.25V
14
、
9
、
11