7478 SPN Fault Code


Road Curvature Based on Lane Marks


The road curvature parameter is based on lane marks as measured by the FLI. It is the mean value of the road curvature of the lane marks on the left and right side of the lane. In case one of the lane mark is not recognized anymore, the value is set to the value of other side. The SPN represents the road curvature computed at the camera position.Positive values are used for left curves. Curvature is the inverst of the radius and is zero for straight roads. Parameter specific values for this parameter are as follows: FB01h = not in range FB02h = not reliable FB03h to FBFFh = reserved for parameter specific indicator FC00h to FDFFh = reserved range for future indicator bits FExxh (65024 � 65279) = error indicator FFxxh (65280 � 65535) = not available or not installed

7478 spn fault code name is Road Curvature Based on Lane Marks. If you don't take the time to look into 7478 spn fault when it arises, it can add up quickly. One small issue like 7478 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: The name and description of 7478 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.

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