Bypassing Neutral Safety???
Thread Starter
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Mountain Pass
Joined: Aug 2011
Posts: 210
Likes: 0
From: Weatherford, TX
Bypassing Neutral Safety???
Ok I have a 2004 F250 Diesel automatic. Having intermittent starting issues. Try to start it in park no go. Shift into neutral while trying to start it will fire up. Well now thats not working anymore. Batteries are good along with battery cables.
Well spoke with stealership and they said I need to try and adjust the shift linkage since the neutral safety is internal I dont have time to drop the pan and install new one. Going to check the relays later on when I get time to and check other connections for the ignition. If everything is good and it is the neutral switch is there a way to bypass it temp until have time to replace?
Well spoke with stealership and they said I need to try and adjust the shift linkage since the neutral safety is internal I dont have time to drop the pan and install new one. Going to check the relays later on when I get time to and check other connections for the ignition. If everything is good and it is the neutral switch is there a way to bypass it temp until have time to replace?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,722
Likes: 2,648
From: SE Florida
It sure won't be easy. It's a sensor, not a switch. It sends a digital signal to the PCM that tells if it is safe to start or not. You can't jump two wires, you need to create that digital signal. It's a frequency modulated signal.
Hotshot
Joined: Apr 2010
Posts: 19,060
Likes: 238
From: Saratoga Springs,UT
I can check mine with my scangauge
do you have a SGII
Im not exactly shure where its at on this truck
I will see if I can dig up some info on it
BTW tha steeler word will usually turn a tech away from helping you
do you have a SGII
Im not exactly shure where its at on this truck
I will see if I can dig up some info on it
BTW tha steeler word will usually turn a tech away from helping you
Hotshot
Joined: Apr 2010
Posts: 19,060
Likes: 238
From: Saratoga Springs,UT
<TABLE style="WIDTH: 668pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=891 x:str><TBODY><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM-COLOR: #d4d0c8; BACKGROUND-COLOR: yellow; BORDER-TOP-COLOR: #d4d0c8; WIDTH: 668pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #d4d0c8; BORDER-LEFT-COLOR: #d4d0c8" class=xl24 height=17 width=891></TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM-COLOR: #d4d0c8; BACKGROUND-COLOR: yellow; BORDER-TOP-COLOR: #d4d0c8; WIDTH: 668pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #d4d0c8; BORDER-LEFT-COLOR: #d4d0c8" class=xl26 height=17 width=891>Transmission Range (TR-P) Sensor Assembly</TD></TR><TR style="HEIGHT: 71.25pt; mso-height-source: userset" height=95><TD style="BORDER-BOTTOM-COLOR: #d4d0c8; BACKGROUND-COLOR: yellow; BORDER-TOP-COLOR: #d4d0c8; WIDTH: 668pt; HEIGHT: 71.25pt; BORDER-RIGHT-COLOR: #d4d0c8; BORDER-LEFT-COLOR: #d4d0c8" class=xl25 height=95 width=891>The transmission range (TR-P) sensor assembly is an internally mounted sensor that includes the detent spring, rooster comb and bracket, located next to the solenoid body. The components of the TR-P sensor are factory adjusted to each other and the sensor must be installed as a calibrated assembly. The TR-P sensor contains electronic circuitry that provides the PCM a fixed frequency at a duty cycle for each of the various positions of the manual lever (PARK, REVERSE, NEUTRAL, DRIVE, M3, M2 and M1) to the PCM. The PCM uses the TR-P sensor signal for engine functions (start, reverse lamps) and for line pressure control, shift scheduling and TCC operation.</TD></TR></TBODY></TABLE><!-- / message --><!-- sig -->
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Mountain Pass
Joined: Aug 2011
Posts: 210
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From: Weatherford, TX
Ok I'm sorry if I offend anyone. is the sensor something that has to be installed by the dealer or something that can be taken care of in the driveway?
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Hotshot
Joined: Apr 2010
Posts: 19,060
Likes: 238
From: Saratoga Springs,UT
maybe Mark could tell us about TR sensor calibration
Thread Starter
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Mountain Pass
Joined: Aug 2011
Posts: 210
Likes: 0
From: Weatherford, TX
Ok found this info posted from Bismic.
https://www.ford-trucks.com/forums/8...eshooting.html
No Crank/No Start; Vehicles with TorqShift Transmission:
If this condition is occurs it may be due to a problem in the cooling fan electric clutch. This may be accompanied by transmission range sensor codes P1705 (TR not indicating neutral on self test), P0706 (TR-P sensor frequency fault) and P0707 (TR-P sensor circuit duty cycle low input). Check the voltage at the TR sensor pin 21, circuit 371, it should read 12 volts. If the voltage is low (3-4 volts), unplug the cooling fan electrical connector and retest. If the voltage is now 12 volts, try starting the engine. If it starts, clear codes and test drive to see if the TR sensor codes return. If they do not, diagnose the cooling fan electric clutch. Broadcast Messages 0520, 1069.
Will these codes show up without a check engine light on?
https://www.ford-trucks.com/forums/8...eshooting.html
No Crank/No Start; Vehicles with TorqShift Transmission:
If this condition is occurs it may be due to a problem in the cooling fan electric clutch. This may be accompanied by transmission range sensor codes P1705 (TR not indicating neutral on self test), P0706 (TR-P sensor frequency fault) and P0707 (TR-P sensor circuit duty cycle low input). Check the voltage at the TR sensor pin 21, circuit 371, it should read 12 volts. If the voltage is low (3-4 volts), unplug the cooling fan electrical connector and retest. If the voltage is now 12 volts, try starting the engine. If it starts, clear codes and test drive to see if the TR sensor codes return. If they do not, diagnose the cooling fan electric clutch. Broadcast Messages 0520, 1069.
Will these codes show up without a check engine light on?
Thread Starter
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Mountain Pass
Joined: Aug 2011
Posts: 210
Likes: 0
From: Weatherford, TX
Well only had couple no starts and both times shifting it over into neutral it would start. Times before that I would just try back later and it would start up fine. Just thought about this but when I was trying to start it earlier by moving shifter over to neutral while turning the key there was a fast clicking noise coming from the fuse box. Maybe a relay going out? Wasn't thinking to clearly earlier since I was a little ticked.
In any case going to check all connection and the cooling fan just to make sure. I appriciate the timely responses to my problem.
In any case going to check all connection and the cooling fan just to make sure. I appriciate the timely responses to my problem.
Hotshot
Joined: Apr 2010
Posts: 19,060
Likes: 238
From: Saratoga Springs,UT
Well just thought I would ask wondered If it was like our FICM that needs to be programed to the specific truck its going on Thanks Mark
to the OPoster
If you had a scangauge we could program for transmission range and see what gear the range sensor is telling the PCM its in
and heres where you look for the fan clutch wire chaffe
Ford Truck Enthusiasts Forums - BLADE35's Album: 6.0 sensor pics - Picture
to the OPoster
If you had a scangauge we could program for transmission range and see what gear the range sensor is telling the PCM its in
and heres where you look for the fan clutch wire chaffe
Ford Truck Enthusiasts Forums - BLADE35's Album: 6.0 sensor pics - Picture