Trying to find more info online but coming empty handed so appreciate the help and ideas. Troubleshooting speed sensors after one ton swap.
Bear with me on the long write-up, but tried to detail as much as possible towards troubleshooting.
2012 Wrangler Rubicon 3.6 with Auto transmission
Front - 1979 Ford D60 HP – Detroit and 5.38 gears
Rear – 1970’s Chevy 14 bolt axle (smooth bottom) with disc brake conversion using front chevy ¾ calipers. Detroit locker and 5.38 gears, VKS tone rings
I swapped these axles from my 2010 JK which run without issues. My understanding is the 12 and up JKs are a bity more electronic finicky comparted to older JKs. 2011 and older only need two wheel speed sensors to keep the Jeep happy and drivable (speedo, partial ABS, traction control stuff). The 12 and up seem to require at least 3 wheel speed sensors to keep the computer and tranny happy otherwise they go into “limp mode”, only allowing second gear forward.
Progress so far:
-Right after the swap, only two rear axle sensors, Jeep in limp mode. I used a Superchip Flashcal (Procal would not have arrived in time) to program tire size and gear ratio, clear all codes etc.
-I wired the two front sensor wires to the back wheels as the front axle does not have tone rings
-I then added two additional wheel speed sensors so the rear axle now has 2 speed sensors per side
The current configuration is:
LF (driver left front) wired to independent sensor on rear axle by LR (driver rear)
RF (passenger right front) wired to independent sensor on rear axle next to LR (passenger rear)
I drove the car, gears are shifting, however ABS light and EPS come up. EPS may be due to not have fully aligned steering wheel straight yet.
Scan shows the following codes:
U140A – Implausible Right Front wheel speed signal received
C1015 – Right Front Wheel Speed Sensor Circuit
I have rechecked all the wiring and the sensors. I swapped the connectors on the right\passenger side between the sensors (front and rear). Swapping them I come with the issue as being the back sensor. So that lets me conclude the sensors are good, and the issue would likely be wiring harness to the sensor.
I rechecked the harness for continuity, all looks good. I also tried changing the polarity to see if that would make any difference, no change. I also played with adjusting the air gaps between the sensor and tone ring. As
So I am still a bit puzzled
I am also wondering if the Detroit could be the culprit? The “implausible” signal does not seem an indication the sensor or connections are bad, but maybe because all sensors are picking up the wheels speeding at the same exact speed could that be the issue?
I am curious if crossing the sensors moving the front right wiring to the left wheel and vice versa would improve anything?
Anyone else dealt with this stuff?