Circuit problem diagnosis
Unplug the engine inlet pressure and temperature sensor harness connector, the instrument panel displays "inlet pressure and intake temperature sensor open or shorted to ground", use a multimeter to measure the harness connector, pin 1 is grounded, pin 2 and 3 have 5v voltage Pull out the accelerator pedal position sensor harness connector, the instrument panel displays "The accelerator pedal position sensor is open or shorted to ground." Through the above test can be initially determined that the vehicle vecu has output the communication signal to the engine eecu and the vehicle wiring harness, check the oil Road problem.
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