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Idle speed connector issues?

Motor Vehicle Maintenance & Repair Asked by Thang Tons on September 27, 2020

My car idle speed actuator connector has 3 pins. Disconnected the plug from the actuator, and key at on position, and each pins are individually grounded with multimeter, the multimeter reads 12.60 v for the 2 pin, about 1.56 volts each for 1 and 3 pins. Surprise, why pins 2 and 3 are giving voltage reading. Shouldn’t they give 0 volts???

One Answer

I got this from a 1.6 liter Hyundai manual (we don't have the 1.2 in the USA) but the operation is exactly the same.

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The voltage you are seeing is probably the result of a "pull-up" resistor on the grounding transistors inside the ECU.

Answered by SteveRacer on September 27, 2020

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