Method for diagnosing a noisy failure of a fuel level sensor in a vehicle
First Claim
1. A method for diagnosing a noisy failure of a fuel level sensor in a vehicle, comprising:
- determining if a predetermined diagnosis beginning condition is satisfied;
comparing, when the diagnosis beginning condition is satisfied, a conversion voltage with a predetermined voltage, the conversion voltage being converted from a signal from the fuel level sensor;
counting a number of detections of a fluctuation in accordance with the comparison of the conversion voltage with the predetermined voltage;
comparing a fluctuation detection duration with a predetermined period;
comparing, when the fluctuation detection duration exceeds the predetermined period, a fluctuation detection counter value with a first predetermined number;
counting a noisy failure when the fluctuation detection counter exceeds the first predetermined number;
comparing a noisy failure counter value with a second predetermined number; and
warning of a noisy failure when the noisy failure counter value exceeds the second predetermined number.
1 Assignment
0 Petitions
Accused Products
Abstract
When a predetermined diagnosis beginning condition is satisfied, a conversion value converted from a signal from a fuel level sensor is compared with a predetermined value, and a detection of a fluctuation is counted in accordance with the comparison. When a fluctuation detection duration exceeds a predetermined period and a fluctuation detection counter value exceeds a first predetermined number, a noisy failure occurrence is counted and a noisy failure of the fuel level sensor is warned of in the case that the noisy failure counter value exceeds the second predetermined number.
-
Citations
7 Claims
-
1. A method for diagnosing a noisy failure of a fuel level sensor in a vehicle, comprising:
-
determining if a predetermined diagnosis beginning condition is satisfied;
comparing, when the diagnosis beginning condition is satisfied, a conversion voltage with a predetermined voltage, the conversion voltage being converted from a signal from the fuel level sensor;
counting a number of detections of a fluctuation in accordance with the comparison of the conversion voltage with the predetermined voltage;
comparing a fluctuation detection duration with a predetermined period;
comparing, when the fluctuation detection duration exceeds the predetermined period, a fluctuation detection counter value with a first predetermined number;
counting a noisy failure when the fluctuation detection counter exceeds the first predetermined number;
comparing a noisy failure counter value with a second predetermined number; and
warning of a noisy failure when the noisy failure counter value exceeds the second predetermined number. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification