Second-order Diagnostic Error of Magic Speed s3etc Electronic Throttle Drive

1. The resistor slider inside the throttle is short-circuited and directly contacts the high potential of 5V.

2. Short circuit between signal line B and throttle 5V computer line.

3. short circuit between signal line b and power supply B.

4. There is an open circuit in the negative line of the throttle power supply, which causes the signal line to receive positive potential. From the fault code analysis, it can be seen that because one throttle signal is high, the two throttle signals are inconsistent, and ECU takes failure protection to prevent the throttle opening and the opening signal input by the accelerator pedal from opening at the same time. In the read data stream, one throttle opening is displayed as 10 1%, which is obviously abnormal. When the idle speed is normal, the throttle opening below 5% is considered normal. When the throttle data of ECM is wrong, the fail-safe program will be automatically started. Perform a fixed throttle opening of 5%.