involves models: Junjie FSV / FRV sedan.
Symptom: The actual engine temperature is about 90 ℃, but the water temperature meter display alarm has approached or reached the red region.
Faulty: Ground line below the positive battery contact failure, after processing the grounding point at the high temperature table indicates the problem can be solved. The reason is not consistent with the relationship between the specific projection welding stud with the vehicle body where the grounding point, the relationship between them can be divided into two forms.
FIG 1
(1) The first case is higher than the bottom surface of projection welding stud body sheet metal member (FIG. 1), such relations with the correct form. Ground Ground lines copper ring can be connected directly to the bottom surface of the vehicle body in the projection welding stud vehicle body by welding, by a multi-car vehicles to be demolished without failure, the bottom surface of projection welding studs found thereat higher than body sheet metal parts.
FIG. 2
(2) The second case is lower than the bottom surface of projection welding stud body and the body sheet metal or sheet metal with level (FIG. 2), such as an error in the form of mating relationship. Ground Ground copper wire can not be connected directly to the vehicle body by welding the bottom surface of the projection welding stud vehicle body, and connects to the insulating paint coated vehicle body, the harness leading to poor contact. Disassemble by non-vehicle mounted vehicles on a multi-failure problems, and found that the bottom surface where the projection welding studs are below the vehicle body sheet metal. In this case, the Ground Ground line rubs after copper ring can be fastened to the body sheet metal member, there will be significant scratch marks on the body sheet metal member, can be dismounted after grounding copper ring see scratch marks.
Countermeasure: After the disassembly of the grounding point, if the vehicle body noticeable scratches, it is necessary for the grounding point polished bottom surface treatment to ensure good contact with the body grounding copper ring after tightening Ground nuts.
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