Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The TCM requests the ECM to illuminate the malfunction indicator lamp (MIL).
The TCM increases line pressure control solenoid valve (SLT).
The line pressure is at maximum, and freezes the transmission adapt functions.
The ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as a Freeze Frame.
The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as a Failure Record.
The TCM stores DTC P1780 in TCM history.