Check 4x4 message right after start up
10-26-2018, 10:48 PM
#1
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Check 4x4 message right after start up
Hello all new to the forum here. So I just purchased this new to me 2011 fx4 Ecoboost. So when I purchased the solenoid was missing the tubing to the iwe system. So I used it as a bargaining tool and got a good price for the truck. So upon further inspection the lines were brittle and would just crumble throughout the whole system. I tested the solenoid and it would engage 4x4 hi and low and shut off the vac at the solenoid just the iwb’s We’re always engaged so I knew the tcase was fine and the system was good it just needed some new vac hose. So to get me by I bypassed the bad vac hose system and ran some hard vac hose to the iwe’s and connected them to the solenoid so I can drive around in 2wd without the cv axles spinning with the wheels. So after doing this the solenoid stopped shutting off and I started to get the check 4x4 message right after engine start up. I replaced the solenoid thinking it just went bad but I got the same result with the new one. Got my power probe out and started checking fuses and they all checked out. I provide power to the ground leg on the solenoid it clicks and shuts off the vacuum so at this point I think the tcm is running a check on startup and it doesn’t like something thus giving me the check 4x4 message and disabling 4x4. Any ideas why it’s unhappy?
10-27-2018, 09:12 AM
#4
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P1867
P1812
P1899
you were right I did have codes. Looks like my scanners don’t see the transfer case module. Took it to a buddy that has a snap on scanner. Ok research time...
P1812
P1899
you were right I did have codes. Looks like my scanners don’t see the transfer case module. Took it to a buddy that has a snap on scanner. Ok research time...
10-27-2018, 09:45 AM
#5
Senior Member
You can also use Forscan, see the thread at the top of the forum, to scan EVERY module for codes.
P1812:00 — 4-Wheel Drive Mode Select Circuit Failure: No Sub Type Information
Fault sets when TCCM C2371A pin 16 detects an open circuit or short to battery. Four-Wheel Drive (4WD) system mode cannot be changed.
P1867:00 — Transfer Case Contact Plate General Circuit Failure: No Sub Type Information
Fault sets when an invalid shift motor position is detected during selection of a new 4WD mode or during a motor movement. If the shift motor is not moving, shift motor movement will be prevented. If the shift motor is moving when this DTC sets, the shift motor will move to the high-side or low-side mechanical stop position.
P1812:00 — 4-Wheel Drive Mode Select Circuit Failure: No Sub Type Information
Fault sets when TCCM C2371A pin 16 detects an open circuit or short to battery. Four-Wheel Drive (4WD) system mode cannot be changed.
P1867:00 — Transfer Case Contact Plate General Circuit Failure: No Sub Type Information
Fault sets when an invalid shift motor position is detected during selection of a new 4WD mode or during a motor movement. If the shift motor is not moving, shift motor movement will be prevented. If the shift motor is moving when this DTC sets, the shift motor will move to the high-side or low-side mechanical stop position.
10-27-2018, 10:01 AM
#6
Senior Member
What I'm about to say could be useless, but I purchased a new cluster from a 4x4, mine is 2wd, I would always get the "check 4x4" at start up w/ wrench after cleared. The cluster was programmed for 4x4 and knew something was amiss, I fixed this in forscan later. Is it possible your hose bypass is just triggering the message?
10-28-2018, 08:35 AM
#7
Mark
iTrader: (1)
Looks like a t-case shift motor to me...