Diagnostic system and method for processing continuous and intermittent faults
First Claim
1. A diagnostic system for diagnosing a device of a vehicle, comprising:
- a first electronic circuit configured to generate samples of a parameter of the device;
a second electronic circuit configured to indicate whether each of the samples passed or failed based on comparisons of the samples with one of a predetermined value and a predetermined range;
a third electronic circuit configured to track a first number of consecutive samples compared, to track a second number of the first number of samples that failed, to track a third number of the first number of samples that failed consecutively, and to track a fourth number of a last predetermined number of samples compared that failed,wherein the second electronic circuit is further configured to;
select one of a normal control mode, a temporary default action mode and a permanent default action mode based on the first, second, third, and fourth numbers;
transition from the normal control mode to the temporary default action mode and takes a temporary default action based on at least one of the third and fourth numbers;
transition to the permanent default action mode and takes a permanent default action based on at least one of the first, third, and fourth numbers; and
selectively set a diagnostic trouble code (DTC) in memory when in the permanent default action mode.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for diagnosing a device of a vehicle, includes: generating samples of a parameter of the device; indicating whether each of the samples passed or failed based on comparisons of the samples with one of a predetermined value and a predetermined range; tracking a first number of consecutive samples compared, a second number of the first number of samples that failed, a third number of the first number of samples that failed consecutively, and a fourth number of a last predetermined number of samples compared that failed; selecting one of a normal control mode, a temporary default action mode and a permanent default action mode based on the first, second, third, and fourth numbers; and selectively setting a diagnostic trouble code (DTC) in memory when in the permanent default action mode.
10 Citations
21 Claims
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1. A diagnostic system for diagnosing a device of a vehicle, comprising:
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a first electronic circuit configured to generate samples of a parameter of the device; a second electronic circuit configured to indicate whether each of the samples passed or failed based on comparisons of the samples with one of a predetermined value and a predetermined range; a third electronic circuit configured to track a first number of consecutive samples compared, to track a second number of the first number of samples that failed, to track a third number of the first number of samples that failed consecutively, and to track a fourth number of a last predetermined number of samples compared that failed, wherein the second electronic circuit is further configured to; select one of a normal control mode, a temporary default action mode and a permanent default action mode based on the first, second, third, and fourth numbers; transition from the normal control mode to the temporary default action mode and takes a temporary default action based on at least one of the third and fourth numbers; transition to the permanent default action mode and takes a permanent default action based on at least one of the first, third, and fourth numbers; and selectively set a diagnostic trouble code (DTC) in memory when in the permanent default action mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 21)
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11. A method, performed by an electronic circuit, for diagnosing a device of a vehicle, comprising:
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generating samples of a parameter of the device; indicating whether each of the samples passed or failed based on comparisons of the samples with one of a predetermined value and a predetermined range; tracking a first number of consecutive samples compared, a second number of the first number of samples that failed, a third number of the first number of samples that failed consecutively, and a fourth number of a last predetermined number of samples compared that failed; selecting one of a normal control mode, a temporary default action mode and a permanent default action mode based on the first, second, third, and fourth numbers; transitioning from the normal control mode to the temporary default action mode and taking a temporary default action based on at least one of the third and fourth numbers; transitioning to the permanent default action mode and taking a permanent default action based on at least one of the first, third, and fourth numbers; and selectively setting a diagnostic trouble code (DTC) in memory when in the permanent default action mode. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification