Does Yinglang gearbox need maintenance?

The Yinglang gearbox of Pacific Auto Network is frustrated and needs to be repaired. The damage of solenoid valve is an important reason for frustration, which can be divided into accidental and fixed periods. The difference is simple. Accidental means irregular, fixed means reaching a certain speed or changing a certain gear (second gear into third gear) and a fixed speed appears.

First, check whether the engine TPS related lines and ECM lines are normal. Using Tech-2 to observe the dynamic data flow of the engine, it is found that the throttle opening is 20% when the engine is idling, and 7% under normal conditions, which is preliminarily judged as TPS failure. Circuit Description: The function of throttle idle actuator (MTIA) is to control idle speed through the throttle itself. By operating the throttle valve, a smaller opening (0 or 19) can be achieved. The airflow characteristics are different under different throttle opening. In fact, the mass air flow function of TPS has a low gradient when the opening is small, which makes the air flow control more accurate during idle speed control. In other working conditions, the throttle is controlled by the conventional Bowden cable. The voltage signal provided by TPS varies with the angle of throttle plate. The signal voltage at idle starts to change from nearly 5V, and at full open (WOT), it is

0.2 ~ 0.4 volts. TPS signal is one of the important inputs used by ECM to control fuel supply and other functions, such as idle speed, full throttle, deceleration dilution and accelerated enrichment.

Remarks: The main functions of TPS are:

1)TPS is an important reference variable to judge the engine working condition, that is, the index for ECM to judge whether the engine is in "idle speed", "partial working condition", "full load working condition" and "acceleration and deceleration working condition" (ECM judges the change rate of TPS signal).

2)TPS can be regarded as the second load sensor of the engine, which can replace MAP sensor as the load reference signal after engine failure. In the EFI system without MAF sensor, such as Sail (parameter | picture), TPS generally does not directly participate in the judgment of engine intake.

3)TPS signal is an important reference variable in the upshift and downshift calibration diagram of automatic transmission, and it is also a reference variable for monitoring engine torque for oil pressure adaptation when automatic transmission shifts gears.

4)ECM can directly calculate the torque diagram of the engine according to TPS signal and engine speed signal. Buick Hideo (parameter | picture) gearbox problem maintenance, Hideo gearbox fault maintenance: After determining the fault point, the professional maintenance technicians of Zhonghui replaced TPS and corresponding wear parts, reassembled them and carried out a test drive. The vehicle operated normally, shifted gears smoothly, accelerated forcefully, and the fault problem was solved.

Fault summary: In this case, the fault occurs intermittently, the engine idling (coasting) is abnormal, and the vehicle feels impact when driving (especially the vehicle equipped with automatic transmission). From the troubleshooting results after replacing TPS, it can be known that when the TPS signal is deviated, whether there is a fault code or not, it may affect the acceleration performance of the engine, the performance of the engine speed during taxiing, and the shift quality (P, R or N, D, R shift). Buick Hideo gearbox problems, Buick Hideo gearbox maintenance, Hideo gearbox problems, Hideo gearbox failures, Hideo gearbox setbacks, Hideo gearbox oil leakage, Hideo gearbox maintenance, Hideo gearbox problems.

(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)