DCU test box

Abstract

The invention provides a DCU test box which comprises a box body and an integrated test harness. The box body is provided with multiple potentiometers, multiple actuator indicator lights, an external power interface, a DCU power interface and a DCU signal transmission interface. The potentiometers and the actuator indicator lights are connected with the DCU signal transmission interface respectively. The external power interface is connected with the DCU power interface through a power inverter. The DCU power interface and the DCU signal transmission interface are connected with a DCU to be tested through the integrated test harness. The integrated test harness is provided with an OBD plug used for being connected with a third-party diagnostic tool. A power switch is arranged between the power inverter and the DCU power interface. The integrated test harness comprises a DCU power line, an OBD line and a DCU signal transmission line. According to the scheme of the DCU test box, wiring is simple, the testing process is visual, a common technician can use the DCU test box conveniently, the testing time is short, cost is low, and popularization and use are convenient.

Description

technical field [0001] The invention relates to a test box, in particular to a DCU test box used for a DCU (Dosing Control Unit, urea injection control unit) in an SCR post-processing system of a National IV model. Background technique [0002] In order to ensure the quality and performance of the vehicle, the DCU needs to be tested before its assembly and production. At present, there is no systematic test tool for the test of the DCU electronic control unit, and there are two commonly used test tools: one is to connect all components through the wire harness to judge whether there is a short circuit or an open circuit fault. At this time, a large number of wire harnesses are required. For line connection, the line is complicated. And when using this tool to test, first of all, the problem of the wiring harness must be eliminated to ensure that the wiring harness is connected normally. The test point is used for measurement, which requires professionals to perform the tes...

AI Technical Summary

Problems solved by technology

At present, there is no systematic test tool for the test of the DCU electronic control unit, and there are two commonly used test tools: one is to connect all components through the wire harness to determine whether there is a short circuit or an open circuit fault. At this time, a large number of wire harnesses are required. Make line connections, complex lines

And when using this tool to test, first of all, the problem of the wiring harness must be eliminated to ensure that the wiring harness is connected normally. Test points for measurement, which requires professionals to test, and the test takes a long time and the cost is high

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