ABS issues

[Backlash2032]

Well I was able to tear into it a little more and discovered something odd. In the tewd the rear wheel speed sensor has four wires, psen, rr+, rr-, and ect. They all match up correctly except ect doesnt have a pin to match up to in the b3 connector. And everywhere I read says the speed sensor is a 3 wire, whereas the tsrm says it has 4. W58 sensor maybe?

Sent from my HTC6435LVW using Tapatalk

 

[jdmfreak]

Mine is a 3 wire sensor having the same issue but haven't dug into it much (other than there are only 3wires running all the way to b3) I just recently wired in my rear speed sensor I'll be looking into it more soon

 

[Backlash2032]

Just checked for voltage on the rear wheel speed sensor signal wires and I have a constant .3 volts.. looks like a bad speed sensor. As far as I can tell, it's all wired up correctly.

Sent from my HTC6435LVW using Tapatalk

 

[hvyman]

Psen is the signal. that will vary depending on speed. rr+ should be a 5 or 12v constant with key on and rr- should be ground.

with all that you should be able to check whether is the wiring or ecu.

 

[Backlash2032]

Well I was checking for voltage on rr+/-, not psen in the last post. So I went out and double checked and yeah I'm getting .3 volts on the rr+ wire.. I'd assume that's an ecu output (12volts on rr+), as I don't get any voltage with the key on and the ecu unplugged.. so bad abs ecu?

Sent from my HTC6435LVW using Tapatalk

 

[hvyman]

Are you checking at the ecu? Ecu would need to be plugged in as well.

 

[jdmfreak]

Are you checking at the ecu? Ecu would need to be plugged in as well.

Are you talking about the abs computer or the tccs??

 

[hvyman]

Abs. Those 3 wires do not go to the tccs. Just through the engine harness.

 

[Backlash2032]

Yes, backprobing the connectors with them connected to the abs ecu. I just removed them to see if the 12 volts was an ecu output, which it appears it is, as I get 0 volts front probing the connector. To me, it looks like a bad ecu..

Sent from my HTC6435LVW using Tapatalk