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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 56 (Automatic Transmission - JATCO CVT) >> Description and Operation >> Electronic Component Description >> Primary Speed Sensor

Primary Speed Sensor

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

The primary speed sensor is installed to the transmission side cover.

The primary speed sensor detects the primary pulley speed and generates an ON-OFF pulse signal according to the rotor speed.

TCM judges the rotor speed from the pulse signal.

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