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JD 6320 coolant sensor fault
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Posted 1/24/2023 16:17 (#10057464)
Subject: JD 6320 coolant sensor fault

Hello. I have a JD6320 and the red coolant warning light, blue warning lights come on along with the gauge going to full hot after 10-12 minutes of operation from cold start. If the ignition key is cycled off and on everything resets for another 10-12 minutes. Have already tested the coolant and intake temp sensors all the way to the ecm, all voltage readings within spec.
3.6v after 10 min. Even though they tested good, changed both sensors, fault still present. Inputs to ecm same as at sensor. Replaced ECM, fault still present. Note: when new ecm was programmed, JD tech mentioned it was logging a fault code for engine coolant sensor voltage but scanner read 0 fault counts, even with code present. He was puzzled, any ideas?
Thanks, Mike
Ps- I don’t have a wiring schematic for this

Edited by MikeB2023 1/24/2023 16:19
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