How to Resolve the BMW DTC Warning Light?

[McIker]

Here are the methods to eliminate the DTC warning light: 1. One method is to take the vehicle to a 4S shop for inspection and repair, then use a decoder to clear the fault codes in the electronic control unit, which will turn off the DTC light; 2. Another method is to restart the engine and press the DTC switch button on the vehicle to reactivate DTC. If there are no issues, the DSC warning light will be eliminated. Below is an introduction to the functions of DTC: 1. It determines whether the drive wheels are slipping by comparing the rotation speed of the drive wheels and the transmission wheels. When the former exceeds the latter, it suppresses the drive wheel speed as part of a traction control system. Its operation mode is very similar to ABS, as both use sensors and brake regulators. When DTC detects wheel slip, it first adjusts the engine ignition timing through the engine control computer, reduces engine torque output, or applies brakes to the slipping wheel to prevent further slipping. 2. In cases of severe slipping, it further controls the engine fuel supply system. During operation, the transmission maintains higher gears, and when the throttle is increased, it avoids sudden downshifting to prevent more severe slipping. The most notable feature of DTC is its use of the existing ABS system's computer, speed sensors, and control over the engine and transmission computer, ensuring accurate application even when using a spare tire.