Commercial vehicle AMT fault diagnosis and program flashing wire harness

Abstract

The utility model relates to a wire harness, and specifically relates to a commercial vehicle AMT fault diagnosis and program writing wire harness. The wire harness comprises an OBD male end interface, a wire harness body and N DB9 female end interfaces. M pins are arranged on the OBD male end interface; the OBD male end interface is connected to one end of the wire harness body; the other end of the wire harness body is provided with N branch sub-wires; each DB9 female end interface is provided with nine pins which are respectively connected to the end parts of the N branch sub-lines, the pin II and the pin VII in each DB9 female end interface are respectively communicated with two pins in the M pins on the OBD male end interface, and the two pins on the OBD male end interface communicated with the pin II and the pin VII in each DB9 female end interface are different from each other. According to the utility model, the two DB9 female end interfaces corresponding to the definition of the vehicle model array pin are selected to be inserted into the brushing tool or the diagnosis tool, so that the use requirements of different vehicle models can be met, and the universality of the wire harness is improved.

Description

Technical Field

[0001] The utility model relates to a wiring harness, in particular to a commercial vehicle AMT fault diagnosis and program flashing wiring harness. Background Art

[0002] At present, the technology in the field of commercial vehicles is constantly improving, and the demand for AMT automatic transmissions is strong. The AMT transmission market has been applied in 6-speed and 8-speed medium and light trucks. However, there are often different requirements for shifting performance and strategies from the OEM, or the program of the AMT transmission installed on the vehicle needs to be rewritten due to the upgrade of the AMT transmission program, or the need to troubleshoot and diagnose after-sales vehicles when they have faults. At this stage, calibration personnel and after-sales service personnel generally connect calibration equipment and diagnostic instruments through the vehicle OBD interface, and then complete the transmission data calibration, program rewriting or fault diagnosis through calibration equipment and diagnostic instruments.

[0003] As the number of OEMs matching gearboxes increases, the problem of gearboxes adapting to different OBD interface definition diagnostic harnesses has emerged due to the different OBD interface definitions of each OEM. The traditional diagnostic harness only has two DB9 female interfaces, CAN1 and CAN2, which are too limited and not universal, and cannot meet the application requirements of every OEM model.

[0004] Chinese patent CN219801440U discloses a transmission calibration diagnosis and flashing harness, including a vehicle harness plug connector, the vehicle harness plug connector is connected to the transmission harness plug connector through a first connecting harness, a second connecting harness is connected from the first connecting harness, and the second connecting harness is connected to a DB9 female connector; when the DB9 female connector is connected to a diagnostic instrument, it is used for TCU diagnosis or program flashing; when the DB9 female connector is connected to a CANape, it is used for TCU data calibration. However, the harness only has one DB9 female connector, which still cannot meet the requirements for application on every OEM model. Utility Model Content

[0005] The purpose of the utility model is to solve the technical problem that the existing diagnostic wiring harness has only two DB9 female interfaces, CAN1 and CAN2, which is too limited, not universal, and cannot meet the application requirements of each OEM model, and to provide a commercial vehicle AMT fault diagnosis and program flashing wiring harness.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A commercial vehicle AMT fault diagnosis and program flashing wiring harness, which is special in that:

[0008] It includes an OBD male interface, a wiring harness body and N DB9 female interfaces, where N>2;

[0009] The OBD male interface is provided with M pins, namely, pin 1, pin 2, ..., pin M-1 and pin M, where M≥16;

[0010] The OBD male interface is connected to one end of the wiring harness body and is used to plug into the OBD female interface of the commercial vehicle;

[0011] N branch sub-wires are arranged at the other end of the wiring harness body; each DB9 female interface has 9 pins, which are respectively connected to the ends of the N branch sub-wires, and pins II and VII in each DB9 female interface are respectively connected to two pins among the M pins on the OBD male interface, and the two pins on the OBD male interface connected to pins II and VII in each DB9 female interface are different, and are used to select two DB9 female interfaces whose pins II and VII in the N DB9 female interfaces correspond to the definition of the four pins in the OBD female interface on the commercial vehicle, and are used to be plugged into the connection interface of an external flashing tool or a diagnostic tool.

[0012] Furthermore, the number of DB9 female interfaces is 4, and the OBD male interface is provided with 16 pins, namely pin 1, pin 2, ..., pin 15 and pin 16;

[0013] The other end of the wiring harness body is provided with 4 branch sub-wires, and 4 DB9 female end interfaces are respectively connected to the ends of the 4 branch sub-wires;

[0014] Pins II and VII on the first DB9 female interface are connected to pins 1 and 9 on the OBD male interface respectively;

[0015] Pins II and VII on the second DB9 female interface are connected to pins 2 and 10 on the OBD male interface respectively;

[0016] Pins II and VII on the third DB9 female interface are connected to pins 3 and 11 on the OBD male interface respectively;

[0017] Pins II and VII on the fourth DB9 female connector are connected to pins 6 and 14 on the OBD male connector accordingly.

[0018] Furthermore, M=16, and the M pins on the OBD male interface are arranged in a 2×8 array.

[0019] Furthermore, the nine pins in the DB9 female interface are divided into two groups, the number of pins in the first group is five, and the number of pins in the second group is four; the first group of pins and the second group of pins are staggered up and down, and each pin of the second group is located between two adjacent pins of the first group.

[0020] The beneficial effects of the utility model are:

[0021] The utility model can improve the universality of the wiring harness according to the use needs of different vehicle models by selecting two DB9 female interfaces corresponding to the vehicle model pin definitions and plugging them into a flashing tool or a diagnostic tool; and can simultaneously collect CAN1 and CAN2 data streams for fault diagnosis and analysis, which not only reduces production costs but also provides convenience for technicians and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the distribution of pins on the DB9 female interface in an embodiment of the utility model.

[0024] In the figure: 1-OBD male interface, 2-wiring harness body, 3-branch line, 4-DB9 female interface. DETAILED DESCRIPTION

[0025] In order to make the purpose, advantages and features of the utility model clearer, the following is a further detailed description of a commercial vehicle AMT fault diagnosis and program flashing wiring harness proposed by the utility model in combination with the accompanying drawings and specific embodiments. According to the following specific implementation methods, the advantages and features of the utility model will be clearer.

[0026] This embodiment is a commercial vehicle AMT fault diagnosis and program flashing wiring harness, see Figure 1 The wiring harness includes an OBD male end interface 1, a wiring harness body 2 and N DB9 female end interfaces 4, N>2.

[0027] Among them, the shape of the OBD male interface 1 is an isosceles trapezoid, and the OBD male interface 1 is connected to one end of the wiring harness body 2. When in use, the OBD male interface 1 is plugged into the OBD female interface of the commercial vehicle. M pins are arranged on the OBD male interface 1, and the M pins are arranged in a rectangular array, namely pin 1, pin 2, ..., pin M-1 and pin M, M≥8. In this embodiment, 16 pins are arranged on the OBD male interface 1, and the 16 pins are named pin 1, pin 2, ..., pin 15 and pin 16 respectively.

[0028] In this embodiment, four DB9 female interfaces 4 are provided. Accordingly, according to the number of DB9 female interfaces 4, four branch sub-lines 3 are provided at the other end of the wiring harness body 2, and the four DB9 female interfaces 4 are respectively connected to the ends of the four branch sub-lines 3.

[0029] The shape of the DB9 female interface 4 is also an isosceles trapezoid. There are 9 pins on the DB9 female interface 4. The nine pins in the DB9 female interface 4 are divided into two groups. The number of pins in the first group is five, and the number of pins in the second group is four. The first group of pins and the second group of pins are staggered up and down, and each pin of the second group is located between two adjacent pins of the first group.

[0030] In this field, see Figure 2 , usually the first set of pins on the DB9 female connector 4 is from right to left (with Figure 2 The pins of the second group are named as pins VI, ..., IX from right to left. Meanwhile, in this field, when the pins of the OBD male interface 1 are connected to the DB9 female interface 4, they must be connected to pins 2 and 7 of the DB9 female interface 4.

[0031] In order to meet the needs of use, pins II and VII in the DB9 female interface 4 are respectively connected to two pins among the 16 pins on the OBD male interface 1. At the same time, the two pins on the OBD male interface 1 to which pins II and VII on the four DB9 female interfaces 4 are connected are different. The four DB9 female interfaces 4 are respectively connected to the ends of the four branch sub-lines 3. Specifically, in this embodiment, pins II and VII on the first DB9 female interface 4 are connected to pins 1 and 9 on the OBD male interface 1 accordingly; pins II and VII on the second DB9 female interface 4 are connected to pins 2 and 10 on the OBD male interface 1 accordingly; pins II and VII on the third DB9 female interface 4 are connected to pins 3 and 11 on the OBD male interface 1 accordingly; pins II and VII on the fourth DB9 female interface 4 are connected to pins 6 and 14 on the OBD male interface 1 accordingly.

[0032] Through the above design, it is convenient to select two DB9 female end interfaces 4 whose pins II and VII correspond to the definitions of the four pins in the OBD female end interface on the commercial vehicle, thereby facilitating the plugging of the male end interface of an external flashing tool or diagnostic tool.

[0033] In addition to the above pin connection relationship, the remaining pins are connected using existing connection methods in the art.

Claims

1. A commercial vehicle AMT fault diagnosis and program flashing wiring harness, characterized by: It comprises an OBD male end interface (1), a wiring harness body (2) and N DB9 female end interfaces (4), wherein N>2; The OBD male interface (1) is provided with M pins, namely pin 1, pin 2, ..., pin M-1 and pin M, where M≥16; The OBD male end interface (1) is connected to one end of the wiring harness body (2) and is used to be plugged into the OBD female end interface of a commercial vehicle; The other end of the wiring harness body (2) is provided with N branch sub-wires (3); each DB9 female end interface (4) has 9 pins, which are respectively connected to the ends of the N branch sub-wires (3); pins II and VII in each DB9 female end interface (4) are respectively connected to two of the M pins on the OBD male end interface (1); and the two pins on the OBD male end interface (1) connected to pins II and VII in each DB9 female end interface (4) are different, and are used to select two DB9 female end interfaces (4) whose pins II and VII correspond to the definition of the four pins in the OBD female end interface on the commercial vehicle, and are used to plug into the male end interface of an external flashing tool or a diagnostic tool.

2. A commercial vehicle AMT fault diagnosis and program flashing wiring harness according to claim 1, characterized in that: The number of the DB9 female end interfaces (4) is 4, and the OBD male end interface (1) is provided with 16 pins, namely pin 1, pin 2, ..., pin 15 and pin 16; The other end of the wiring harness body (2) is provided with four branch sub-wires, and four DB9 female end interfaces (4) are respectively connected to the ends of the four branch sub-wires (3); Pins II and VII on the first DB9 female interface (4) are connected to pins 1 and 9 on the OBD male interface (1) respectively; Pins II and VII on the second DB9 female interface (4) are connected to pins 2 and 10 on the OBD male interface (1) respectively; Pins II and VII on the third DB9 female interface (4) are connected to pins 3 and 11 on the OBD male interface (1) respectively; Pins II and VII on the fourth DB9 female interface (4) are connected to pins 6 and 14 on the OBD male interface (1) respectively.

3. A commercial vehicle AMT fault diagnosis and program flashing harness according to claim 1 or 2, characterized in that: The M=16, and the M pins on the OBD male interface (1) are arranged in a 2×8 array.

4. A commercial vehicle AMT fault diagnosis and program flashing wiring harness according to claim 1, characterized in that: The plug shape of the OBD male interface (1) is an isosceles trapezoid.

5. A commercial vehicle AMT fault diagnosis and program flashing harness according to claim 4, characterized in that: The socket shape of the DB9 female end interface (4) is an isosceles trapezoid.

6. A commercial vehicle AMT fault diagnosis and program flashing wiring harness according to claim 1, characterized in that: The nine pins in the DB9 female end interface (4) are divided into two groups, the number of pins in the first group is five, and the number of pins in the second group is four; the pins in the first group and the pins in the second group are arranged in an upper and lower staggered manner, and each pin in the second group is located between two adjacent pins in the first group.

Images