Push-button start system fault diagnosis
First Claim
1. A method comprising:
- determining, using a plurality of vehicle subsystem control modules including respective processors, said control modules being in communication with each other and receiving signals from at least a vehicle communications bus and vehicle sensors, that a no engine crank condition has occurred if the switch is pressed and the brake is applied, and if so, performing a no crank diagnosis;
determining, using the respective processors in the control modules, that a starter control relay has not been enabled after the system is in a crank power mode, and if so, performing a starter control relay not-enabled diagnosis, and recording at least one first indication of error within a first vehicle subsystem control module of the vehicle subsystem control modules;
determining, using the respective processors in the control modules, that the starter control relay has been disabled before the engine begins to run, and if so, performing a starter control relay disabled diagnosis, and recording at least one second indication of error within the first vehicle subsystem control module;
determining, using the respective processors in the control modules, that the engine has stalled within a defined threshold time after being started, and if so, performing an engine stall diagnosis; and
switching the vehicle to a run power mode when the engine is started and no faults have been detected.
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Abstract
A method for diagnosing a no-start fault of a vehicle push-button start system including a push-button switch, where the system starts a vehicle engine if the switch is pressed and a vehicle brake is applied. The method includes detecting that a no engine crank condition has occurred if the switch is pressed and the brake is applied, and if so, performs a no crank diagnosis. The method also includes determining that a starter control relay has not been enabled after the system is in a crank power mode, and if so, performs a starter not-enabled diagnosis. The method also includes determining that the starter control relay has been disabled before the engine is running, and if so, performs a start disable diagnosis. The method also includes determining that the engine has stalled within some minimum time after it has successfully been started, and if so, performs an engine stall diagnosis.
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Citations
28 Claims
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1. A method comprising:
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determining, using a plurality of vehicle subsystem control modules including respective processors, said control modules being in communication with each other and receiving signals from at least a vehicle communications bus and vehicle sensors, that a no engine crank condition has occurred if the switch is pressed and the brake is applied, and if so, performing a no crank diagnosis; determining, using the respective processors in the control modules, that a starter control relay has not been enabled after the system is in a crank power mode, and if so, performing a starter control relay not-enabled diagnosis, and recording at least one first indication of error within a first vehicle subsystem control module of the vehicle subsystem control modules; determining, using the respective processors in the control modules, that the starter control relay has been disabled before the engine begins to run, and if so, performing a starter control relay disabled diagnosis, and recording at least one second indication of error within the first vehicle subsystem control module; determining, using the respective processors in the control modules, that the engine has stalled within a defined threshold time after being started, and if so, performing an engine stall diagnosis; and switching the vehicle to a run power mode when the engine is started and no faults have been detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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- 25. A method for diagnosing a no-start failure of a vehicle push-button start system for a vehicle engine that includes a push-button switch, said method comprising determining, using a plurality of vehicle subsystem control modules each including a processor, said control modules being in communication with each other and receiving signals from other controllers, a vehicle communications bus and vehicle sensors, that one or more fault conditions have occurred, where the fault conditions include a no engine crank condition, a starter control relay not enabled, the starter control relay disabled before the engine is running, and the engine stalled within some minimum time after being started, and further comprising switching the vehicle to a run power mode when the engine is running and none of the fault conditions have occurred.
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28. A method comprising:
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determining in order until the failure has been identified, using a plurality of vehicle subsystem control modules each including a processor, said control modules being in communication with each other and receiving signals from at least a vehicle communications bus and vehicle sensors, that a no engine crank condition has occurred, a starter control relay has not been enabled, the starter control relay has been disabled before the engine is running, and the engine has stalled within some minimum time after being started; recording at least one first indication of error within a first vehicle subsystem control module of the plurality of vehicle subsystem control modules; and switching the vehicle to a run power mode when the engine is running and the failure has not been identified.
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Specification