2014 Lexus IS350 C1406 Code

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Feb 21, 2023 | 06:05 AM

tfordala

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From: AL

2014 Lexus IS350 C1406 Code

2014 Lexus IS350..I am getting the C1406 Code (Open or Short in Front Speed Sensor Left Circuit). I have replaced the Hub and Sensor on both sides and installed new wire on drivers side and still getting the same Code 1406..ABS and Traction light stay on..Any ideas on what to check next? My cruise control has stopped as well since this started. I also have the check VGRS on dash and trying to clear or reset it and it comes back to Code C1406...

Feb 21, 2023 | 09:44 AM

2013FSport

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From: OR

Quote:

Originally Posted by tfordala

OP generally speaking this group covers the G2's...

What was the brand of bearing used to replace it? Has the car had any other work done on that side for crash damage? If no, pay super close attention the mouse droppings as you might have a critter on board destroying stuff.

Do you still have the old wheel bearing? To absolutely rule it out and the replacement, you could temporarily connect it to the other side. If it was open/shorted internally, it would throw a new code. I doubt it will as it sounds like something between new wire and skid ECU is damaged.

Taking a WAG that these are powered 3 wire sensors. If yes, you need ground, 12 volts and data. Two of these you can verify with a DMM. The data line could be ohmed from side to side looking for differences in ground potential.

If two wire, then it gets a bit difficult as these can be shielded cables, and if they lose ground the input to the skid ecu sees noise.

Still, I would unplug both sides and use an ohm meter from ground to each pin and compare sides. Report back what you find.

GL

Feb 21, 2023 | 02:35 PM

tfordala

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From: AL

No crash damage on the car...we kept old hubs and swapped them around with new and each time got same code from same wheel..its a 2 wire sealed for the sensor and its good all the way up to the ABS Module..I am guessing need to send off the module to be checked and if so repaired.

Feb 21, 2023 | 03:38 PM

2013FSport

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From: OR

Quote:

Originally Posted by tfordala

You're saying the wire from the wheel to the skid ECU was replaced?
Was this done by a dealer or Indi? You need someone with Toyota Techstream software to look at the skid control and ABS module using live data. They can also do system level checks too.

Have you looked on fleabay for the module? It would likely be a fraction the cost.

Feb 21, 2023 | 03:47 PM

tfordala

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7th Gear

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From: AL

The wire from sensor to plug just inside the fender wheel was replaced..Wire onto abs is fixed into plug for the abs module...its all good..I have the scanner for this car and it does it all..I changed the wire myself..not paying a dealer that kind of money and still be where I am now..I looked and the module is not very expensive at all..i hate buying parts when I am not usre on whats the issue..i think Ill just send mine to be checked and repaired if need be..about same cost as a used module.