GS 20 Output Control Signals

GS 20 Output Control Signals

Valve Body Solenoid and Pressure Regulator Control












The GS 20 activates the 3 shift solenoids by individual switched ground output control signals.

The Main Oil Pressure and Torque Converter Lock up regulators are controlled by a Pulse Width Modulated (PWM) control to ground.

PWM control modulates the hydraulic control pressures based on the current AGS shift program and maintains adaptive pressure control.

Shift Lock Solenoid Control:







The shift lock feature prevents the unintentional movement of the shifter from Park or Neutral.

When KL 15 is switched on, the shift lock is engaged, when the brake pedal is pressed, the CS 20 releases the ground control circuit of the shift lock solenoid unlocking the shift gate. Additionally, above 2500 RPM, the selector lever remains locked in Park even if the brake pedal is applied.

P/N Signal:

As an output function, the GS 20 provides the EWS 3.3 with a switched high/low signal for P/N status.
- P or N = high
- all other ranges = low.

The EWS 3.3 provides the P/N safety feature preventing the starter motor from operating unless the shifter is in P/N (high signal).

Back Up Light Relay Control:

As an output function, the GS 20 provides a switched ground to activate the control circuit of the back up light relay when the range selector is in R. The Back Up Light Relay provides power directly to the back up lights. The lighting circuit is also used as a high signal indicating Reverse status for PDC, NAV and the electro chromatic rearview mirror systems.