Electronic Transmission Range Select (ETRS) Components
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
B315A Transmission Range Control Valve 1 Position Switch
This position switch uses the 9V1 reference voltage from the TCM to power the component.
This component detects the position of the component: ETRS Valve
B316 Transmission Park Valve Position Switch
This position switch uses the 9V2 reference voltage from the TCM to power the component.
This component detects the position of the component: Park Servo Valve
M123 Transmission Park Valve Lock Solenoid Actuator
- When energized the actuator will extend a pin, locking the park servo in the applied position which holds the parking pawl in the out of park position.
- The M123 Transmission Park Valve Lock Solenoid Actuator is also known as the:
- Park Inhibit Solenoid
- Park Inhibitor Solenoid
- Park Inhibit Solenoid Actuator (PISA)