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Was looking through the older postings concerning the coolant temperature sensors on the z500 and ran across this one. Does anyone know what the final outcome was for this? I am on my 4th sensor waiting on the dealer to replace under parts warranty. I bench tested the first three one for resistance and all have failed specs according to the service manual page I managed to find online. I tested continuity on the harness to the gauge cluster pigtail connection and it was good. The most recent one apparently was defective before installing because my gauge stayed on one bar from the start. Thanks!
Quote from: Davydo on December 08, 2019, 08:13:49 AMWas looking through the older postings concerning the coolant temperature sensors on the z500 and ran across this one. Does anyone know what the final outcome was for this? I am on my 4th sensor waiting on the dealer to replace under parts warranty. I bench tested the first three one for resistance and all have failed specs according to the service manual page I managed to find online. I tested continuity on the harness to the gauge cluster pigtail connection and it was good. The most recent one apparently was defective before installing because my gauge stayed on one bar from the start. Thanks!Looks like the OP hasn't been here sense January but send him a PM and the system will send an email to him. Sense you have an old one how about matching the base and threads with someone else's and trying it. Most of these all work the same and are close to the same temp ranges on resistances. Can't hurt.
Just to clarify a couple things, one bar on the display is the default, you will always have one bar.The sensor is likely not at fault. The coolant temperature sensor uses the body of the sensor itself for ground, there are several layers of interference for the sensor to receive ground. Dirty threads on the sensor or housing it threads into (thread tape is not required, there is a sealing washer), corrosion between the mating surface of the housing and the head or the sensor housing is not to evenly torqued down. You can run a quick testing by mechanically attaching a wire to the body of the sensor and attaching the other end to a good ground.