2009 cascadia abs

What program are you using to connect to the truck? And do you know what abs module it has in it?

 

None of those programs will connector to a Wabco abs system. They would have to use Wabco or a universal program like JPRO to read the codes.

How did they pull the code for the abs valve? If they used they display then the module is communicating. Unplug the valve and see if the dash code changes.

And having the actual code can help us give ya advice to narrow down the issue.

Was the dash light coming on before with the key cycle?

 

The mid 136 sid 2 fmi 1 is for the right steer axle speed sensor reading below normal. Most of the time the air gap between the sensor and the tone wheel is too large just from the sensor moving which happens often. Take a hammer and lightly tap the sensor in. You'll hear the change in tone when the sensor bottoms out. If the truck has a backing plate then a punch may have to be used to reach the sensor.

The mid 136 sid 7 fmi 6 is for the left steer axle abs valve having a short in the circuit. If you know how to use a multimeter unplug it and check your readings. Cycle the key switch with it unplugged and if the fault changes to fmi 5 which is an open circuit fault then odds are your valve has gone.

 

If the speed sensor doesn't moved...its either already bottomed out or seized. If you can see it then grab it with pliers and try to rotate it. That'll tell ya if its seized up. If it is then remove it and clean up the hole it goes in.

 

As for the dash bulb...check the fuse panel if it has an abs indicator fuse. Some trucks have them. Also double check that the cluster doesn't have a replaceable bulb. If it uses LEDs...make sure someone hasn't pulled the led off the circuit board. The light should always come on with the key cycle. 9/10 when the dash indicator doesn't work and the module is still communicating...the lights bee tampered with