Hyster S135FT:
522740-5 Coding out

Been working on this unit for awhile. Replaced alternator, tmap sensor, crank sensor, both O2 sensors and still getting the above code. Unit cranks but shuts right back off as if out of gas and idles rough. Any suggestions on trouble shooting this unit?
  • Posted 9 Aug 2019 05:46
  • Modified 9 Aug 2019 05:59 by poster
  • Discussion started by Teff114Ardent
  • Georgia, United States
Showing items 1 - 3 of 3 results.
It indicates the circuit is open. Check the wiring to the ECU from the O2 sensor.
1. Ensure truck power is OFF.
2. Change DMM to ohms scale. Verify DMM zero reading.
3. Disconnect the oxygen (O2) sensor connector, the indicated PDM connector, and the indicated ECU
connector.
4. At the sensor harness connector, measure the resistance on the sensor supply wire between the sensor
connector and the PDM connector.
Is resistance less than 0.5 ohms?
YES: Go to Step 5.
NO: The supply wire has an open circuit. Locate and repair/replace open wire/connection. Refer to
appropriate Wire Harness Repair manual, depending on lift truck model.
5. Measure the resistance of the sensor drive wire between the sensor connector and the ECU connector.
Is resistance less than 0.5 ohms?
YES: Go to CAUSE B.
NO: The supply wire has an open circuit. Locate and repair/replace open wire/connection. Check that
counterweight has not crushed wire harness, if counterweight was removed. Refer to appropriate Wire
Harness Repair manual, depending on lift truck model.
Diagnostic Trouble Codes Electrical System
Check
  • Posted 9 Aug 2019 22:25
  • Modified 9 Aug 2019 23:59 by poster
  • Reply by BREWSKI
  • Nebraska, United States
BREWSKI
Yes sir. Thanks I know what the codes means just trying to figure out any other diagnostics to perform as we have already replaced the O2 sensors.
  • Posted 9 Aug 2019 21:20
  • Reply by Teff114Ardent
  • Georgia, United States
522740-5 Pre-Cat Bank 2 Heater is Open Circuit..
  • Posted 9 Aug 2019 07:18
  • Reply by BREWSKI
  • Nebraska, United States

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