Diagnostic system for a kickdown switch in an automotive vehicle

Details Diagnostic system for a kickdown switch in an automotive vehicle Diagnostic system for a kickdown switch in an automotive vehicle

1988-08-16

1989-05-30

Wright, Dirk

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74866, 74878, 74865, B60K 4104

Patent

active

048339474

ABSTRACT:
A diagnostic system for watching the sound operation of a kickdown switch in an automotive vehicle equipped with an automatic transmission adapted to be prohibited from operating at the highest speed stage according to the operation of the kickdown switch, the system including a comparator which compares an output signal from a throttle opening sensor corresponding to the depression of the accelerator pedal of the vehicle and an output signal from the kickdown switch, and generates a warning signal when the two output signals are not correlated with one another in a predetermined mutual relation so as to inform the driver of a malfunction of the kickdown switch.

REFERENCES:
patent: 3974720 (1976-08-01), Iijima
patent: 4073203 (1978-02-01), Wurst et al.
patent: 4253348 (1981-03-01), Will et al.
patent: 4501171 (1985-02-01), Muller et al.
patent: 4569253 (1986-02-01), Higashi et al.

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