Speed Sensor Problem
This is a first time post and I appreciate any assistance.....
1995 Nissan D21 Pickup
A few months ago, my speedometer stopped working. I pulled the speed sensor and it was seized and the plastic gear was destroyed. I ordered a new sensor and gear and installed. The speedometer worked for a few weeks, but then would only work intermittently, maybe 10% of the time. Now it does not work at all.
I did a continuity check from the sensor all the way to the harness under the steering wheel to the left of the clutch and everything check out good. The resistance through the speed sensor is 270 ohms, which I believe is a good reading based on some online research. I have not taken the dash apart to check the combo meter. I disconnected the sensor and did a volt check across the two leads while the car was in driving and I did not get any voltage from the sensor. I had the volt meter on AC and I believe I should be getting a reading of a few volts as the car drives.
Is it possible that the sensor is not spinning? Is there a C clip or something that holds the gear in place on the shaft of the sensor? I did not use anything to hold the gear on as I thought there was a stop inside the transmission that would stop it from walking once it was installed.
I would also like to mention that I did have the center support bearing replaced right before the sensor malfunctioned the first time. Could the driveshaft have been installed improperly causing an issue with the sensor?
Thanks for any help.
Last edited by sjaltobelli; Nov 7th, 2012 at 10:59 AM.
Reason: Add year and type