04 Navi No Start-No Crank No PWR to OBD

[03NavigatorGuy]

I replaced the Neutral safety switch AKA: Transmission Range Sensor, and after doing so. The engine will not start in either park and/or neutral. Is there another sensor that is now blocking this from happening?

NOTE: With the "new" temp wire, the transmission selector indicator illuminates, the brake release for the transmission now works again, and so do the turn signals.

 

[stamp11127]

There is a procedure to follow in lining up the range selector to the neutral position. Did you follow it?

Ahhh... the importance of only working on one issue at a time...

 

[03NavigatorGuy]

Yes, I lined up the line with the selector in neutral.

 

[stamp11127]

If you replaced it with a Ford part the service manual says to use a special tool. You may be able to adjust it by checking continuity with the plug disconnected between pins 10 & 12 in both park and neutral.

 

[03NavigatorGuy]

My bad, I forgot to plug the ignition switch back in . It starts in park now!

 

[stamp11127]

What is next on the list?

 

[03NavigatorGuy]

Sometimes I get OBDII to connect to my scanner, and sometimes it doesn't. For example yesterday I got my scanner to read the codes, and today I went to clear them and it wouldn't connect.

 

[stamp11127]

You'll need the diagrams that show the DLC on them, usually the power distribution diagrams have it. Check the engine controls diagrams, sometimes it is on them also.

 

[03NavigatorGuy]

Okay, here is what I have, I hope they are "somewhat" legible!

 

[Hamfisted]

Here's a DLC pin out diagram. Does your DTC scan tool light up when you plug it into the Expy's OBDII port ? It should, even without the ignition key on. It won't read any codes unless the key is on, but it should at least light up and come to life. I think it's fuse 41 if you're not getting any power at the OBD port. What brand is your reader ? Is it hardwired? or one of those Bluetooth type ?
With your volt meter measure pin 16, should be 12v or battery voltage. Check that pin 4 and pin 5 have less than 5 ohm resistance to ground.

 

[03NavigatorGuy]

Yes, I have always gotten power from 16, even when other things were getting power. The problem is the it won't communicate with the scanner, and sometimes it will, but usually it won't!