Gearbox diagnosis wire harness

Abstract

The utility model relates to a gearbox diagnosis wire harness, which is mainly used for solving the problems of incapability of connection or failed flashing caused by abnormal pins and abnormal other nodes when a TCU (Transmission Control Unit) is connected from an OBD (On-Board Diagnostic) interface in the prior art, the problem that extra power supply is needed when the TCU is disassembled, and the technical problem that an interface of a CAN (Controller Area Network) is not exposed outside any more. The first connector, the second connector and the panel which are connected with one another are adopted, the first connector is connected with the whole vehicle, the second connector is connected with the gearbox, meanwhile, the first connector and the second connector are directly connected, and the CAN line of the whole vehicle is connected from the gearbox. The problem that different connecting wire harnesses need to be adopted due to different definitions of OBD interfaces of different vehicle types is solved.

Description

Technical Field

[0001] The utility model relates to a transmission wiring harness, in particular to a transmission diagnostic wiring harness. Background Art

[0002] During the automatic transmission matching stage, the transmission needs to be calibrated, fault diagnosed and data refreshed frequently; after the subsequent products go through the standard operating procedure (SOP), after-sales service personnel also need to diagnose faults and refresh data on the transmission.

[0003] Currently, controller area network (CAN) devices typically communicate with the transmission controller unit (TCU) via the vehicle's onboard diagnostics (OBD) interface. Alternatively, the TCU can be removed from the vehicle and connected to the corresponding pins on the TCU for diagnosis and data flashing. This approach has the following disadvantages: ① During the initial pairing of some products, the CAN device's wiring harness is not connected to the OBD, making it impossible to complete the initial calibration of the transmission; ② The CAN network environment of some vehicles is complex. When flashing TCU data via the OBD interface, if other nodes in the vehicle send error frames, the connection may be interrupted, causing data flashing failure; ③ The traditional method of removing the TCU to complete the flashing process is time-consuming and labor-intensive, and requires additional power to the TCU, increasing product maintenance and service costs.

[0004] With the advancement of national information security requirements, more and more vehicles are no longer exposing their CAN network interfaces. This makes it impossible to read vehicle message information through the OBD interface, leading to increased aftermarket repair costs. In addition, with the implementation of vehicle control units (VCUs), CAN messages read from the OBD interface will also have some discrepancies with the messages actually received by the controller, which can easily lead to problems such as misdiagnosis of faults. Utility Model Content

[0005] The purpose of the utility model is to solve the problems that the existing connection from the OBD interface to the TCU may have pin abnormalities, other node abnormalities lead to connection failure or flashing failure, the problem of additional power supply required for removing the TCU, and the technical problem that the interface of the CAN network is no longer exposed to the outside, and proposes a gearbox diagnostic wiring harness.

[0006] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0007] A transmission diagnostic harness is characterized in that it comprises a first connector, a second connector and a panel;

[0008] The first connector is connected to the second connector and the panel line respectively. The first connector is used to connect to the vehicle, receive vehicle signals and transmit them to the second connector. The first connector includes N first pins, where N is a positive integer.

[0009] The second connector is also connected to the panel line, and the second connector is used to connect to the gearbox, receive the gearbox signal and transmit it to the first connector; the first connector transmits the received gearbox signal to the entire vehicle; the second connector transmits the received vehicle signal to the gearbox; the second connector includes N second pins;

[0010] The panel includes N third pins and N light-emitting diodes; the N third pins include at least one vehicle power supply pin, and the N third pins are respectively connected one-to-one with the N first pins and the N second pins; one end of the N light-emitting diodes is connected one-to-one with the N third pins, and the other end is correspondingly connected to the power supply end or ground end of the vehicle power supply pin.

[0011] Furthermore, the N third pins are divided into a third pin with a positive pole and a third pin with a negative pole, and the vehicle power supply pin is a third pin with a positive pole; the third pin with a positive pole and the third pin with a negative pole; the third pin with a positive pole is connected to the positive pole of the corresponding light-emitting diode, and the negative pole of the light-emitting diode is connected to the ground terminal of the vehicle power supply pin; the third pin with a negative pole is connected to the negative pole of the corresponding light-emitting diode, and the positive pole of the light-emitting diode is connected to the power supply terminal of the vehicle power supply pin.

[0012] Furthermore, the vehicle signal received by the first connector includes the vehicle's power supply signal, CAN communication signal, and enable signal.

[0013] Furthermore, the transmission signal received by the second connector includes a CAN communication signal and an enable signal of the transmission.

[0014] Furthermore, the N third pins adopt a quick-plug design.

[0015] Furthermore, the N is 25.

[0016] Furthermore, the first connector is a male connector that is plugged into a connector of the vehicle wiring harness.

[0017] Furthermore, the second connector is a female connector that is plugged into a connector of a transmission wiring harness.

[0018] Beneficial effects of the utility model:

[0019] 1. The utility model has a simple structure and adopts a first connector, a second connector and a panel that are connected to each other, which solves the problem of different connection harnesses required due to different OBD interface definitions of different car models; the utility model has good versatility and can reduce the cost of product use and maintenance.

[0020] 2. The utility model is easy to use, avoiding the inconvenience of traditional dismantling of the TCU for data flashing and the problem of needing to provide controller power supply.

[0021] 3. The utility model has a high success rate for connection and flashing, which reduces the impact of other nodes in the vehicle CAN network on the TCU connection and flashing, and avoids the problem of TCU being unable to connect and flash due to abnormalities in the vehicle CAN line.

[0022] 4. The utility model can use simple power supply equipment to provide additional power to the TCU, avoiding the problem of insufficient voltage for the entire vehicle and difficulty in powering the single gearbox.

[0023] 5. This utility model connects the vehicle through the first connector and the transmission through the second connector. The direct connection between the first and second connectors allows the vehicle's CAN line to be connected from the transmission. This solves the problem of being unable to read the vehicle's power supply signal, enable signal, and CAN communication signal through the OBD interface when the CAN network interface is no longer exposed. It also solves the problem of misjudgment of faults caused by inconsistent VCU forwarding messages.

[0024] 6. The utility model can intuitively judge the fault problem of the corresponding pin of the gearbox through the light-emitting diode on the panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an embodiment of a transmission diagnostic wiring harness of the present utility model;

[0026] Figure 2 This is a schematic structural diagram of a panel in an embodiment of a transmission diagnostic wiring harness of the present invention.

[0027] Description of reference numerals:

[0028] 1. First joint; 2. Second joint; 3. Panel. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] like Figure 1 As shown, a transmission diagnostic harness includes a first connector 1, a second connector 2 and a panel 3 connected to each other.

[0031] First connector 1 is a male connector that connects to second connector 2 and panel 3. First connector 1 includes N first pins, where N is a positive integer. First connector 1 is used to plug into the connector of the vehicle's wiring harness, transmitting the vehicle's power supply signals, CAN communication signals, and enable signals to second connector 2. It also receives signals from second connector 2 and transmits them to the vehicle. In this embodiment, N is 25.

[0032] Second connector 2 is a female connector that connects to first connector 1 and panel 3. Second connector 2 contains N second pins. Second connector 2 plugs into the connector on the transmission wiring harness and transmits the transmission's CAN communication and enable signals to first connector 1. First connector 1 then transmits these signals to the vehicle. The second connector receives the vehicle's power, CAN communication, and enable signals from the first connector and transmits them to the TCU.

[0033] like Figure 2 As shown, panel 3 includes N third pins and N light-emitting diodes (D1 to D25); the N third pins adopt a quick-plug design, and the N third pins include at least one vehicle power supply pin, and the N third pins are connected one by one with the N first pins and the N second pins respectively. The N third pins are divided into positive-pole effective third pins and negative-pole effective third pins. In this embodiment, the 25 third pins include 5 vehicle power supply pins, 6 CAN network pins and 14 ordinary pins, of which 5 vehicle power supply pins are all positive-pole effective. For the positive-pole effective third pin, the positive pole of the light-emitting diode is connected to the third pin, and the negative pole is connected to the ground terminal of the vehicle power supply pin; for the negative-pole effective third pin, the negative pole of the light-emitting diode is connected to the third pin, and the positive pole is connected to the power supply terminal of the vehicle power supply pin. Finally, one end of the N light-emitting diodes is connected to the N third pins in a one-to-one correspondence, and the other end is connected to the power supply terminal or the ground terminal of the vehicle power supply pin. Panel 3 visualizes the terminal signals of the vehicle wiring harness and the transmission harness. When the lines connected to pins 1 and 2 send and receive signals, a potential difference is generated across the LEDs, causing them to illuminate, indicating that the signal at that pin is transmitting normally. If an LED is off, it indicates a fault in the corresponding line.

Claims

1. A transmission diagnostic harness, characterized by: It comprises a first joint (1), a second joint (2) and a panel (3); The first connector (1) is connected to the second connector (2) and the panel (3) respectively, and the first connector (1) is used to connect to the entire vehicle, receive vehicle signals and transmit them to the second connector (2); the first connector (1) includes N first pins, where N is a positive integer; The second connector (2) is also connected to the panel (3) by wire. The second connector (2) is used to connect to the gearbox, receive the gearbox signal and transmit it to the first connector (1); the first connector (1) transmits the received gearbox signal to the entire vehicle; the second connector (2) transmits the received entire vehicle signal to the gearbox; the second connector (2) includes N second pins; The panel (3) comprises N third pins and N light-emitting diodes; the N third pins include at least one vehicle power supply pin, and the N third pins are respectively connected one-to-one with the N first pins and the N second pins; one end of the N light-emitting diodes is connected one-to-one with the N third pins, and the other end is correspondingly connected to the power supply end or the ground end of the vehicle power supply pin.

2. A transmission diagnostic harness according to claim 1, characterized in that: The N third pins are divided into a third pin with valid positive pole and a third pin with valid negative pole, and the vehicle power supply pin is a third pin with valid positive pole; the third pin with valid positive pole and the third pin with valid negative pole; the third pin with valid positive pole is connected to the positive pole of the corresponding light-emitting diode, and the negative pole of the light-emitting diode is connected to the ground terminal of the vehicle power supply pin; the third pin with valid negative pole is connected to the negative pole of the corresponding light-emitting diode, and the positive pole of the light-emitting diode is connected to the power supply terminal of the vehicle power supply pin.

3. The transmission diagnostic harness according to claim 2, characterized in that: The vehicle signals received by the first connector (1) include the vehicle power supply signal, CAN communication signal, and enable signal.

4. The transmission diagnostic harness according to claim 3, characterized in that: The gearbox signal received by the second connector (2) includes a CAN communication signal and an enable signal of the gearbox.

5. A transmission diagnostic harness according to any one of claims 1 to 4, characterized in that: The N third pins are designed to be quick-plug.

6. The transmission diagnostic harness according to claim 5, characterized in that: The N is 25.

7. The transmission diagnostic harness according to claim 6, characterized in that: The first connector (1) is a male connector, which is plugged into the connector of the vehicle wiring harness.

8. The transmission diagnostic harness according to claim 6, characterized in that: The second connector (2) is a female connector that is plugged into a connector on a transmission harness.

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