True statement... my next thought was actually a faulty modulator, but I’m just going to get it to the dealer to get it scanned. I had a feeling you were say that hahaha. So the dealer software will detect where the exact issue is it will they have to test each modulator ?
2011 International Prostar ABS module
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 4vmach1, Oct 6, 2017.
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Ceh3t Thanks this.
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99% of abs problems are wiring. You will notice most wiring to sensors and modulators are twisted. The wiring will actually rub through on other wires and through the loom to the point a dead short hasn't happened yet, but a micro short has started which will set a code. Bendix is extremely sensitive to those. The insulation won't be fully rubbed through and may look ok, but a trace amount of water and salt will penetrate through and cause a short. Very hard to pinpoint with modulators because internally they all share the same common ground inside the abs ecu, so it will not tell you which one. You have to disconnect the harness at the ecu and measure each modulator to ground and see which one has a short. They need to be perfectly open to ground. The ecu will still detect shorts that are in the MegaOhms, or millions of ohms and cause a fault. Hopefully they did fix it 100%, if not, hopefully this will help.
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Heavyd Thanks this.
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Hey
I did accidentally bump the PDL on while driving not sure how long it was on..although i did notice my batteries drained from fridge and bunk heater running and it went to load shedding and the truck barely started up in the cold weather. That’s when I first noticed the lights acting weird. -
Shows the first code is some kind of tire size calibration error. The second is a communication error with the radar at the front of the truck. Since your batteries went low to cause load shedding, it is possible power to the radar is something that got cut off. The PDL can't thing can't hurt anything. Once these get logged you need Bendix software to clear. If they come back, then something is wrong and further troubleshooting is needed.
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The codes will go inactive IF you fix all the problems and the light will go out. To test that drive the vehicle over 5 mph, if it's fix the light will go out.. If not you have to retrieve the codes again and see what you get.
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