Method for detecting ECU performance of common rail engine
The invention discloses a method for detecting the performance of an ECU (Electronic Control Unit) of a common rail engine. An ECU qualified part of the same model, a schematic diagram of the ECU of the model and a digital multimeter are prepared before detection. And an ECU pin corresponding to the...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a method for detecting the performance of an ECU (Electronic Control Unit) of a common rail engine. An ECU qualified part of the same model, a schematic diagram of the ECU of the model and a digital multimeter are prepared before detection. And an ECU pin corresponding to the fault code is found out according to the fault code prompt, the universal meter is set to an ohm gear, a red pen is lapped on a K02 pin of the ECU, and a black pen is lapped on a corresponding ECU pin of the fault code prompt. For example, for a fault code of starting relay open circuit, a black pen is lapped on a K71 pin according to an ECU schematic diagram corresponding to the K71 pin, and a resistance value is tested and recorded; and the ECU with the suspected fault is taken to test and record the resistance value according to the method. And the resistance values measured twice are compared, the judged ECU is normal if the two resistance values are close to each other, and the judgedECU is damaged if the dif |
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