The Aisin AW4 is a four-speed automatic ... It uses a transmission control unit (TCU) along with valve body solenoids to control shifting based on inputs from a speed sensor, throttle position ...

Diagnosing a faulty transmission speed sensor is pretty straightforward, as is replacing it, but to diagnose a problem fully, you’ll need to be comfortable using a multimeter to check voltage.

The recall affects automatic transmission versions only, where the output shaft speed sensor may fail, resulting in an unintended downshift to first gear. If the failure occurs while the vehicle ...