[LMntGuy1982]

So a while back I had the ABS light come on. Got it scanned and found that the left front and right rear wheel speed sensors were bad. Got those replaced and no more light. Then a few weeks later the light came back on. Got it scanned again and got a left front pulsar failure. Anyone have any idea WTF a pulsar is. I already know its something from space as google has so nicely pointed me to. But what is a pulsar in the ABS system?

I took the wheel speed sensor back and replaced it to see if that was the cause. I'll go in monday night to get the code cleared but I was just wondering what a pulsar is.


TIA

 

[Box4Rox]

I think it is the rotating part of the speed sensor system - Maybe part of the rotor or hub assembly (backside) if you look on Majestic Honda Parts . . . might look like a ring with teeth/notches.

It also may be built into the hub assembly and not specifically called out as part of the ABS. Maybe there is crud built up in there that is tricking the diagnostics into thinking bad sensor ? The rotating part (passive metal ring) seldom fails.

:?

 

[Box4Rox]

Check this link out - about 2/3rds the way down in mentions the "pulser" ring . . . old Honda/ Acura term but maybe it still applies . . .

http://www.tomorrowstechnician.com/Article/564/mastering_early_honda__acura_abs_systems.aspx

If you find a wheel-speed sensor code, check the wiring continuity between the sensor, connector and wiring harness.
Sensor resistance can be checked with an ohmmeter at the sensor or through the harness. Refer to a manual for the exact specs, but as a rule the front sensors on the 1992 Acura applications should read 750 to 1,200 ohms, and the rear sensors 1,100 to 1,600 ohms.
If a wheel-speed sensor's resistance is within normal range, remove the sensor and inspect it for damage or metallic debris sticking to the tip. Wheel-speed sensors are magnetic and will attract wear debris from the rotors and brake pads. As this stuff builds up, it reduces the strength of the signal produced by the sensor. Also, inspect the condition of the teeth on the WSS sensor ring (which Honda calls the "gear pulser"). A layer of rust on the teeth or nicks or damage to the teeth can prevent the wheel-speed sensor from generating a good signal.

 

[LMntGuy1982]

Good info!! When we had put the sensors in my friend suggested putting some anti-seize stuff on it. When I took out the faulty sensor it was pretty covered in that crap. That may have been what caused it but I swapped it just to be safe. Then I cleaned all that stuff out before I put the new one in. Still have a code but I should be able to get it cleared tomorrow night and see if it throws any more. Thanks for the help.