Instantaneous wire interruption detection system for vehicle electrical system
First Claim
1. An instantaneous wire interruption detection system for an electrical system of a vehicle that detects an instantaneous wire interruption that occurs in the electrical system of the vehicle due to a temporary contact failure, comprising:
- a signal abnormality detection portion for detecting a signal abnormality, the signal abnormality being temporarily reproduced when a repair center vibrates a signal wire of the vehicle, to provide a detection result; and
a holding portion for latching the detection result as a latch signal when the signal abnormality detection portion detects the signal abnormality;
an output circuit for outputting the latch signal; and
an external connection unit, being connected to the output circuit only when the repair center checks for the signal abnormality so as to receive the latch signal, wherein the external connection unit is provided with a warning device that issues the warning when the signal abnormality is detected.
1 Assignment
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Accused Products
Abstract
In an instantaneous wire interruption detection system for a vehicle electrical system, a VSC-ECU includes an input processing circuit that processes electric signals transmitted from various sensors and an EFI-ECU by a signal wire (wire harness); a signal state determination circuit that determines whether the electric signals processed by the input processing circuit are normal or abnormal; a latch circuit that latches the determination result as a latch signal; and an output circuit that can output the latch signal. When a signal abnormality is detected by the signal state determination circuit, the latch circuit is able to generate the latch signal in synchronization therewith, and latch the latch signal for a predetermined time. Accordingly, for example, by connecting a tester device to the output circuit, and monitoring the latch signal, it is possible to detect instantaneous wire interruption of the electrical system.
7 Citations
8 Claims
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1. An instantaneous wire interruption detection system for an electrical system of a vehicle that detects an instantaneous wire interruption that occurs in the electrical system of the vehicle due to a temporary contact failure, comprising:
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a signal abnormality detection portion for detecting a signal abnormality, the signal abnormality being temporarily reproduced when a repair center vibrates a signal wire of the vehicle, to provide a detection result; and a holding portion for latching the detection result as a latch signal when the signal abnormality detection portion detects the signal abnormality; an output circuit for outputting the latch signal; and an external connection unit, being connected to the output circuit only when the repair center checks for the signal abnormality so as to receive the latch signal, wherein the external connection unit is provided with a warning device that issues the warning when the signal abnormality is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification