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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard is formulated with reference to ISO 15031-3: 2004 Road vehicles—Communication between vehicle and external equipment for emissions-related diagnostics—Part 3: Diagnostic connector and related electrical circuits, specification and use.
This standard is under the jurisdiction of National Technical Committee of Auto Standardization (SAC/TC 114).
Road vehicles—Diagnostic connector
1 Scope
This standard specifies the terms and definitions, general requirements, tests and requirements of vehicle diagnostic connectors.
This standard is applicable to connectors for external diagnostic equipment of vehicles in Categories M and N.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
QC/T 417.1 Wire harness connector for vehicle—Part 1: Definition, test methods and general performance requirements (vehicle part)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in QC/T 417.1 and the following apply.
3.1
diagnostic connector
a connector for communication between vehicles and external diagnostic equipment, short-term connection, live mating & unmating. It consists of two parts: the vehicle connector and the external test equipment connector.
4 General requirements for connector
4.1 Structure, shape and dimension
For the shape and dimension of the connector, see Figures 1 and 2; for the shape and dimension of the blade, see Figure 3. The connector contact mating shall be designed so that the signal ground and the chassis ground contacts of the connector make electrical contact prior to any other connector contacts making electrical contact. On the disconnect cycle, these same two contacts shall not lose electrical contact until all of the other contacts have been disconnected.
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Dimensions in millimetres
a Access to the mating end shall be clear in this area for the connecting connector.
b The code identification of the vehicle connector contact shall at least mark 1, 8, 9 and 16, and shall be, at minimum, 1.3 mm and 0.1 mm raised characters.
c Access area dimension.
Figure 1 Vehicle connector
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Dimensions in millimetres
a See Figure 1.
b Blade detail: see Figure 3.
c Construction shown is for guidance only.
d Alignment tab detail.
e Blades No. 4 and No. 5 have extended length for ground circuit application.
f No draft.
Figure 2 External test equipment connector
Dimensions in millimetres
a Oblique plane.
Figure 3 Blade detail
4.2 Contact allocation and application
4.2.1 Contact allocation
See Figure 1 and Table 1 for allocation of the connector contact.
Table 1 Contact allocation
Contact Application
1 Discretionary
2 Discretionary
3 Discretionary
4 Chassis ground
5 Signal ground
6 CAN_H line
7 K line
8 Discretionary
9 Discretionary
10 Discretionary
11 Discretionary
12 Discretionary
13 Discretionary
14 CAN_L line
15 L line
16 Permanent positive voltage
4.2.2 Definition of vehicle connector contact
4.2.2.1 Vehicle connector contacts 1, 2, 3, 8, 9, 10, 11, 12 and 13
Allocation of Contacts 1, 2, 3, 8, 9, 10, 11, 12 and 13 of the vehicle connector is left at the discretion of the vehicle manufacturer.
4.2.2.2 Vehicle connector contact 4
Contact 4 of the vehicle connector is designated chassis ground and shall be connected electrically to the vehicle chassis such as to provide power ground for external test equipment.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements for connector
5 Connector test and requirements
