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What causes the EECU failure in Dongfeng Tianlong trucks?

1 Answers

VonZachary

07/29/25 12:39pm

It is generally believed to be caused by issues with the accelerator pedal, accelerator pedal wiring, vehicle VECU failure, or communication line faults between the instrument cluster, VECU, and EECU. Below are the relevant details: 1. Fault analysis: First, supply 5V power to the accelerator pedal sensor 1 and 2 power lines while grounding the ground wire. Use a multimeter to measure whether the feedback signals from sensor 1 and 2 are 0.76 and 0.37, respectively. If the relationship between the two is correct, then the accelerator pedal is not the issue. 2. Purple connector: Disconnect the purple connector on the VECU and locate wires 0012 and 0013, which are yellow and green, respectively. Use a multimeter to measure whether the resistance between them is 120Ω. If the measurement shows 120 ohms, then the initial possible causes can be ruled out based on the above measurements.

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