Good morning all I’m looking at a JD 650J dozer S/N TO650J178103 that won’t move. There are three codes on dash; 3351.31 which is trans filter restriction, I changed filter but code still comes up so probably a sensor. The next code is 2661.4 and 604.1 which both deal with FNR switch open or short circuit. The TCU doesn’t have a display only has power and status lights. Power light is green but status light is not lit. So my question is how can I get codes from TCU other than electronic service tool? Sorry for the long post.
Sorry I double posted
Service mode of the monitor will get you all the codes and the ability to clear them, among other things. Key on. Press and hold the Menu button for approximately 5 seconds until a beep is heard ad the words Service Mode appear in the screen. Let go of the menu button. Now you have access to all kinds of good fun.
Thank you for this info I'll let you know what I find.
Hey mg2361 my voltage on FNR forward and reverse are 0 volts, the forward and reverse switches are 0 volts as well. Right steer is 1.7, left steer is 3.2, right counter is 1.6 left counter is 3.4. Also left and right pcp has 0 mA. I’m thinking that I have a bad sensor, what do you think?
You have me a little confused. You said forward and reverse switches, and FNR forward and reverse? The FNR only uses a rotary (analog) sensor for forward and reverse. Before condemning the sensor, make sure you have a good sensor supply voltage (5V) and a good return (ground). Also make sure the signal wire is complete all the way back to the TCU.
Ok I'll check that out