Axle Fail-Safe

1. Axles will UNLOCK with ignition switch in either the OFF or ACC position.
2. Axles will not LOCK if there is no ignition switch, vehicle speed, or transfer case position signal. Axles will UNLOCK with the loss of any of these signals.
3. Axles will not LOCK if the ignition switch is OFF.
4. Axles will UNLOCK if a switch failure is detected.

Software Latch Feature: The Totally Integrated Power Module (TIPM) will have a software latch of the axle switch during an ignition switch OFF when the vehicle is in 4 LO transfer case position. Upon ignition key RUN or START the TIPM shall check to verify conditions are correct for an axle lock and automatically lock the axles that were locked before the ignition was turned OFF.