1. Yale Nr040

Super Moderators Registered: Posts: 380 Posted There are 2 Fault descriptions for a code 271. From Manual: Description The master controller has sensed a fault in the control handle operation. The forward/reverse signal is out of range. Symptom If the truck is moving, the speed command is set to zero, the electric brake is engaged, and the truck systems are disabled.

Yale Nr040

Probable Causes and Test Procedures – Enter the Diagnostics – Static Diagnostics - Reach/ Retract Switch menu through the dash display. Switch output should vary from greater than 95% forward throttle to greater than 95% reverse throttle as the Control Handle is moved from full forward to full reverse.

– Using ETACC, verify that the control select parameter is correct for the type of control present on the truck. – Check wiring for loose connections or broken wires between the control handle and the master controller.

– Verify all CANbus wiring and connections are secure. Ensure all connectors are tight and pins are in good condition.

Check all CANbus wiring between the steering controller and the master controller for continuity. – Pin #2 & pin #3 at the handle connector and pin #22 and pin #23 at the master controller connector. – Replace any defective wiring. – Replace the control handle.HERE IS THE 2nd CONDITIONS FOR A 271 FAULT: Description The controller has sensed the handle output voltage is out of range when requesting a lift or lower operation. Symptom Lifting and lowering are disabled.

Traction operates at turtle speed. Probable Causes and Test Procedures – Enter the Diagnostics - Static Diagnostics - Hydraulic Throttle menu through the dash display. Switch output should vary from greater than 95% Lift to greater than 95% Lower as the Control Handle is moved from full Lift to full Lower. Using ETACC, verify that the handle parameters are correct. – Check wiring for loose connections or broken wires between the control handle and the master controller. – Ensure all connectors are tight and pins are in good condition. Check all CANbus wiring between the control handle and the master controller for continuity.

Replace any defective wiring. – Wire #113 between pin #8 at the master controller connector and pin #4 at the multifunction handle connector. – Wire #900 between pin #23 at the master controller connector and pin #2 at the multifunction handle connector. – Wire #901 between pin #22 at the master controller connector and pin #3 at the multifunction handle connector. Verify all CANbus wiring and connections are secure.

– Replace the control handle.