Non-ETRS Electronic Component Description
B15 Transmission Internal Mode Switch
The component is a hall-effect sensor that has two PWM output signal circuits (the sensor is able to provide a PWM due to the additional electronics located within the sensor). The engine control module (ECM) supplies a 5 V reference circuit and a low reference circuit®. Sensor 1 signal circuit is an input to the TCM. Sensor 2 signal circuit is an input to the ECM. Each transmission gear range position has different duty cycle values of the PWM signal. The TCM uses the information from sensor 1 signal to determine what transmission gear range the vehicle operator has selected and apply the clutches for that gear. The ECM uses the information from sensor 2 signal to determine if the transmission is in park or neutral to enable the starter motor for engine cranking.