Conditions for Setting the DTC

WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

The system voltage is too high.
The transmission control module (TCM) detects that the voltage is greater than 18 volts for 0.5 seconds continuously.
The engine revolution is 600 RPM or greater.