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front right sensor output low

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  #11  
Old 06-07-2009, 07:58 PM
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Yes, I do have one. What should I measure?
 
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Old 06-07-2009, 08:17 PM
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Rave, under brakes, shows the pins that the wheel speed sensors go to at the ecu. I would splice into the wires for both the front wheel speed sensors. If you run a few jumper wires you should have no problem closing the hood and driving the truck. Set the meter to a/c volts and watch the increase in voltage on the good side as you accelerate. Then look at the voltage signal on the bad wheel at your 10mph range when the lights comes on. See if anything is obviously different.

Connector at ecu
C0505
Pin 1
Pin 2
Pin 3
Pin 4
 
  #13  
Old 06-07-2009, 08:20 PM
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Hit the wrong key.
Connector 0505 at ecu
Pin 1 Front left wheel speed
Pin 2 Front left wheel speed
Pin 3
Pin 4 Front right wheel speed
Pin 5 Front right wheel speed
 
  #14  
Old 06-07-2009, 08:38 PM
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Yes, I have one. What do I need to measure.
 
  #15  
Old 06-07-2009, 08:42 PM
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Thanks! I will try it over the next few days. Why would the signal be AC volts?
 
  #16  
Old 06-07-2009, 08:52 PM
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That wheel speed sensor is called an ac generator, meaning it produces an analog signal or alternating current. The dmm knows to look for an alternating voltage signal in a/c, instead of a steady current in d/c.
 
  #17  
Old 06-07-2009, 09:00 PM
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Thanks for the information and I really appreciate the help.
 
  #18  
Old 06-07-2009, 09:04 PM
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Originally Posted by grendel
My local LR dealer suggested I replace my aftermarket slotted rotors with factory ones. Has anyone heard of this before?? Not sure how the rotor will affect the ABS sensor.

Already replaced the shuttle valve, so I'm running out of ideas.

Russ
I have driven with DBA slotted and drilled rotors using Kevlar pads for 7 years with no issues.
Go to RSWSolutions.com and read up on the codes and testing procedures.
Let us know what you do.
 
  #19  
Old 06-07-2009, 09:25 PM
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I have the ABS scanner from RSW Solutions... His web site talks about rotor/pads/hubs as being a possible problem for the sensor error.
Does the sensor have to be at a certain height from the reluctor ring? Do you know what type of lubrication goes on the sensor; is it a special brand?
 
  #20  
Old 06-08-2009, 04:13 PM
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Yes, the air gap on that type of sensor is very specific in relation to the reluctor ring.
 
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