Steering System 356Service Manual – CS7000
Steering Travel Limit Switches
The Steering Travel Limit Switches are magnetic
“proximity” switches that are normally open. They are
mounted on each side of the frame. There is a bracket
mounted on the drive wheel steering ring gear with
a “tooth”. As the gear rotates, the “tooth” moves with
it. When the tooth lines up with one of the proximity
switches, its internal switch closes to let the controller
know it should stop moving in that direction.
Tooth
Proximity
Switch
Steering Controller
The steering controller is the heart of the steer by wire system. It operates the steering actuator based on
input requests from the steering wheel rotation sensor and the travel limit proximity switches. It has robust
self diagnostics to protect itself and shut down the steering system if a serious error occurs. It is a sealed
unit with no serviceable parts inside. It is capable of storing DTCs (Diagnostic Trouble Codes). See the
Troubleshooting section for more information.
There is a green LED “Status Indicator” built into the controller that provides important information to the
service technician. Note: you must be looking straight at it and not from an angle for it to be visible.
LED Indicator State Condition
Off The Controller is not powered up, or is powered but not functional.
Blinking slowing (1HZ) Start-up mode.
Blinking rapidly (10HZ) The system is disabled due to an error condition.
On steady The system is fully functional with no error condition.
Steering Controller
Status Indicator
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