2001 Tooper/CHECK blinking on TOD

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2001 Tooper/CHECK blinking on TOD

Postby apassander » Sat Aug 01, 2020 9:18 pm

Just noticed the other day the TOD display started blinking CHECK,need some advice on where to start asap,is this serious?
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Re: 2001 Tooper/CHECK blinking on TOD

Postby Buster28 » Sun Aug 02, 2020 5:19 am

When the Torque on Demand (TOD) display Check lamp flashes it indicates that the TOD "computer" has detected a TOD system fault and that 4WD High range is inoperative.

Pin #8 of the Data Link Connector (DLC) is the TOD diagnostic enable pin, when you ground it with Ignition Switch in Run, the TOD "computer" will flash out the diagnostic failure codes using the Check lamp. Pins 4 and 5 of the DLC are connected to ground.

Flash code 12 signals the beginning and end of the flash code sequence. If there are no codes it will flash only #12, if you don't get a flash #12 the TOD computer could be defective or have a loose cable connector.

In some instances the DLC is mounted upside down. Normally pin 1 is the upper left and pin 16 is the lower right pin.
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Re: 2001 Tooper/CHECK blinking on TOD

Postby 1Trooper » Sun Aug 09, 2020 12:27 pm

I had this problem about three years ago. I had trouble codes 13, 14 and 24. With Buster28 help it turned out it was a short to ground involving one of the two speed sensors on the transfer case. I was able to buy a used speed sensor and started with changing the front one out as it was easier to reach. I spliced the wires into the existing wires as the ends where it connected were on top of the transmission area and were hard to reach. Luckily this ended up being the shorted sensor and fixed the problem. I had read that these sensors on the Trooper and some Fords that had similar sensors would sometimes short out. If you end up having these same trouble codes this might be where the problem is.
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