Hyster H155FT:
Code 520319-1

Having trouble diagnosing code 520319-1. Have replaced all transmission sensors and wiring harness. Transmission goes into gear both forwards and reverse but only for about 3 second. It than goes into neutral and says transmission brake not available, use brakes.
  • Posted 19 May 2022 00:27
  • Discussion started by Jay_Christensen
  • Montana, United States
Showing items 1 - 4 of 4 results.
DTC 520319-1 is "Speed Sensor Input Function: Output Speed: Data Valid But Below Normal Operational Range - Most Severe" and can be caused by: bad battery, blown fuse, bad ground circuit, low power, bad sensor circuit. Most likely issue is a bad wire in a connector or a connector has come loose over time.
  • Posted 27 Aug 2022 07:55
  • Reply by Adam_Thrasher
  • Oregon, United States
A. Thrasher
Finally figured it out. After replacing all transmission sensors and transmission harness and attempting to calibrate several times, I checked all sensors on the display and found out that the new TOS sensor was faulty ??
If you can access the Calibration menu within the display, fo ro Calibration, search for Calibrate XMSN valve and calibrate it.

Follow instructions on the screen and be sure to floor the gas pedal once calibration begins.

Let me know....
  • Posted 23 Aug 2022 09:14
  • Reply by LaGrange
  • Missouri, United States
Strong in mind, Strong in Health.
no code found with this dtc #
  • Posted 18 Aug 2022 05:42
  • Reply by Nwrecchian
  • Maine, United States

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