1999 Ranger 4.0 starting issue

[RonSerling]

I have a 99 Ranger 4.0 with an automatic in it. The issue here is everything has power to it but the truck will not crank and start. I have checked all the fuses and relays and tested them thoroughly. I checked the inertia switch and it was good. This is my sons truck so he tells me the one thing he noticed is that when he turns the key on now he does not hear the fuel pump start up either. Kind of at my wits end here and hoping someone may have some suggestions as to other things that may be causing this problem. Any help or information would be appreciated. Thanks

 

[RonD]

Does the CEL(check engine light) come on with key on, it should, that means computer has booted up

No computer = no fuel pump, but wouldn't effect cranking engine, just wouldn't start

1999 V6 Ranger will have PATS(passive anti-theft system)
This prevents Cranking engine over if activated, and no fuel pump or injectors

There is a THEFT light on the dash, it should come on with key on, and then go off
If THEFT light starts to flash rapidly with key on then PATS is activated and No Start
Wait 45-60 seconds with key on and THEFT light will start to flash a 2 digit code, one flash, pause, then 1 to 6 flashes, longer pause, and it repeats 4 or 5 times

With key off the THEFT light would flash every few seconds to warn thieves that vehicle is protect by an anti-theft system
BUT............because its used when ever vehicle is off that bulb can burn out....................which would be a problem in this situation
You can hook up an OBD2 reader that can see "B" codes, Body codes, and it will have a B code that tells you why PATS was activated

PATS uses a transponder key
There is a ring antenna around the key slot, this power antenna is call the transceiver, PATS module uses that antenna to read the transponder number of that key, if it has the same number in its memory then THEFT light goes off and you can start engine
If no number is received or wrong number then no crank and no start

The transceiver is the most common part to fail, and not hard to replace, but........................better to get the Code instead of just throwing parts at it

PATS Theft light flashing codes
11 Transceiver [transponder coil] not connected, or there is no power to it.
12 Transceiver internal fault.
13 No Key/no PATS key has been used to turn the ignition switch.
14 Incomplete key code received.
15 Invalid key code received.
16 CAN communications error.

 

[RonSerling]

Thanks everyone I found the issue !! Having a bonehead for a son can be a real detriment some times. He dropped his key last night and it cracked. The PATS sensor fell out. After 3 hours of searching I found it on the driveway !!!!! I took some trusty super glue and put it back together and he is off and running once more !! Thanks again