The reason why Highlander's steering wheel becomes heavier

The reason why the steering wheel of Hanlan car is heavy is: 1. If it is a hydraulic booster, check whether there is insufficient oil in the booster and whether there is oil leakage. Lack of oil needs to be replenished to the normal range. Check whether the belt of booster pump is too loose. Tighten the belt and check whether the oil is too dirty to cause poor fluidity. It is usually replaced once every 2 years or 60,000 kilometers. 2. In the case of electronic assistance, check whether the fuse is blown, whether there is an open circuit or a short circuit to the ground; 3, check the tire air pressure leakage will also lead to the direction of heavy need to inflate. The throttle is heavy because it is dirty. Solutions; Disassemble the joint between the air filter and the intake branch pipe, and spray some carburetor cleaner into the throttle (hold the throttle line with your hand to make the throttle shape, and then which valve in the throttle valve body is opened, so that more areas can be cleaned). At the same time, wipe with a clean cloth to remove some black dust;