Default to Park

The TRCM has a spring actuated mechanism that can be tripped to achieve P as a last resort if the push-button shift system is unable to secure the vehicle. The TRCM is commanded to relatch the default to park mechanism when power is restored, the override button is pressed (if equipped) or a key cycle is performed. If the default to park is done with the vehicle running it will take a key cycle to initiate the relatch. Default to park will not initiate if the vehicle is already in P. The mechanism can be tested by requesting a TRCM on-demand self test using a diagnostic service tool.