Leaderboard

@gsg, echoing @Slartibartfast's reply. Also curious to know how it boiled down to the control module. A faulty TFCM would disable signals to solenoids, reducing line pressure and reverting to 2WD operation by default. Something would likely need to be mechanically stuck to keep in 4WD I'd think. Also, note that the presence of the 4WD light at startup indicates a fault present in the TFCM; it doesn't necessarily mean it's in 4WD. A decent scanner can read directly from the module to retrieve any fault codes, but there is also a scanner-less self-diagnostic mode that will flash trouble codes. View the FSM chapter here: https://www.nicoclub.com/service-manual?fsm=Pathfinder%2F2004%2Ftf.pdf ATX14A sections starts on page TF-41, but see page TF-61 for the self-diagnostic mode instructions. If you do it right, it'll reward you with a series of flashes of the 4WD light and 30 extra lives in Contra. You may have more than one code; it'll blink them all before repeating the list.