Q77 Transmission Control Solenoid Valve Characterization Programming (5ET50): Notes

The Q23 line pressure control solenoid in this transmission requires unique performance characteristic data in order to function at maximum efficiency. This data is programmed and stored in the vehicle's hybrid/EV powertrain control module 1. The T6 power inverter module, often referred to as the drive motor generator power inverter module, contains the motor control modules and the hybrid/EV powertrain control module 1.

When a transmission assembly, T6 power inverter module, valve body, or line pressure control solenoid are replaced during service, the performance characteristic data for the solenoid must be retrieved from a web server "cloud" repository and reprogrammed into the hybrid/EV powertrain control module 1.

Reprogramming also ensures that the characteristic data relationship is properly matched between the solenoid, valve body, and transmission.

Solenoid characterization reprogramming is performed using the TIS2Web Service Programming System (SPS).