What is the method for grounding to address false high coolant temperature in Wuling Hongguang?
2 Answers
Wuling Hongguang false high coolant temperature grounding method: There must be a grounding wire connected between the body (chassis) and the engine. Below is relevant information about automotive grounding: 1. Definition: Negative terminal grounding refers to connecting the negative terminal of the battery to the engine or chassis metal body using a battery grounding cable. National standards stipulate that generators and batteries must use negative terminal grounding. Currently, most vehicles produced worldwide adopt negative terminal grounding. 2. Benefits: Vehicle frames and bodies are less prone to corrosion, and automotive electrical systems cause much less interference to radio equipment (such as car audio, communication systems, etc.) compared to positive terminal grounding.
I've been repairing cars for over a decade. A common issue with Wuling Hongguang's false high coolant temperature readings is poor grounding—when the earth wire has poor contact causing the sensor to falsely report high temperatures. The solution is simple: First locate the coolant temperature sensor in the engine bay, usually near the radiator under the hood. Use a wrench to remove the grounding screw, then thoroughly sand off any rust or dirt on the contact surface with sandpaper. Ensure proper tightening when reassembling, leaving no gaps. If needed, add a temporary ground wire—connect one end to the sensor's metal casing and the other to a clean metal part of the car body (like suspension brackets), preferably using copper wire for faster conductivity. This reduces resistance and restores signal accuracy. However, false high readings could also indicate low coolant levels or water pump issues—if temperatures remain high after grounding, immediately check fluid levels and fan operation. For regular maintenance, remember to clean grounding points every six months to prevent such issues and extend vehicle lifespan.
