Test circuit for motor vehicle speed control

Details Test circuit for motor vehicle speed control Test circuit for motor vehicle speed control

1983-04-07

1986-01-21

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3102

Patent

active

045659630

ABSTRACT:
A test circuit for a motor vehicle cruise control system allows testing of the system without driving the vehicle. The cruise control system is of a type that has a vacuum servo for moving the throttle, solenoid valves for varying the vacuum in the servo, an electronic control module for controlling the solenoid valves, and a speed sensor that provides pulses to the control module corresponding to the actual vehicle speed. The test circuit is adapted to be connected between the control module and the leads extending to the various components of the system. The test circuit has series leads that connect the terminals of the system directly with the control module, except for the leads from the speed sensor. The test circuit has indicating means for determining whether or not voltage potential is present in the series leads to check continuity. An oscillator in the test circuit applies pulses to the control module that simulate pulses provided by the speed sensor.

REFERENCES:
patent: 4220912 (1980-09-01), Williams

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