Operation CHARM: Car repair manuals for everyone.

External Controls




External Controls

The indicated position of the transmission selector lever is transferred to the transmission through the transmission selector lever cable and down to the manual control lever on the transmission.


Brake Shift Interlock Actuator (BSIA)

A Brake Shift Interlock Actuator (BSIA) system is used on vehicles equipped with an automatic transmission. This system prevents the transmission selector lever from moving out of the PARK position unless the brake pedal is applied. When the BSIA is de-energized, the transmission selector lever is locked in the PARK position. When the brake pedal is applied, the BSIA is energized and the transmission selector lever can be moved out of the PARK position.


Transmission Control Switch (TCS)

The Transmission Control Switch (TCS) is a momentary contact switch that is located on the transmission selector lever. Pushing the TCS disengages or engages the overdrive function of the automatic transmission. If overdrive is disengaged, the icon overdrive OFF illuminates on the Instrument Cluster (IC).