What is the reason for the Haval Hill Descent Control malfunction?
2 Answers
PT-CAN related wiring or a certain node has a malfunction. The following is an introduction about Haval: 1. Introduction: Great Wall Haval is a sub-brand under Great Wall Motors, established on March 29, 2013. 2. Business Content: The Haval brand, mainly focusing on SUV models, operates in parallel with the Great Wall brand, using independent logos, product development, production, service systems, etc., mainly engaged in SUV production and sales. 3. Brand: It includes two series, the H series and the F series, and Haval accounts for a large proportion of Great Wall brand SUV sales.
I've been driving a Haval H9 for several years and found that the Hill Descent Control (HDC) system malfunctions quite frequently. There are several reasons for this, such as sensor failure. The sensor is responsible for detecting the slope, and if it's clogged with mud or dirt, the system misjudges. Electrical issues are also common, like blown fuses or loose wiring harnesses, especially after driving on bumpy roads. Software glitches are another key factor—some models develop bugs after system updates, or the control module overheats and crashes. Driver error can also be a cause, like accidentally pressing the wrong button or frequently switching modes on extremely steep slopes. I recommend regularly cleaning the sensor area and checking the battery and fuse box. If a malfunction occurs, stay calm, brake gently to descend, and immediately seek professional diagnosis—don't tamper with the wiring yourself to avoid safety risks. Safety comes first, especially on mountain roads where this system can be a lifesaver.
