FILM GP 1702071 - Caterpillar

Illustration 1 g01640379
Schematic of the "Steering Tiller Position Sensor 3"
This diagnostic code is recorded when the ECM reads the duty cycle of the sensor as being out of range.The output frequency of the position sensor is approximately 500 hertz. The value of the sensor's duty cycle is approximately 50% in the center position. The duty cycle of the signal increases as the steering wheel is moved from the center position to the right. The value of the sensor's duty cycle is approximately 90% in the right position. The duty cycle of the signal decreases as the steering wheel is moved from the center position to the left. The value of the sensor's duty cycle is approximately 10% in the left position.The possible causes of this condition are listed below:
The signal circuit is shorted to the +battery or shorted to ground intermittently.
The signal circuit is open intermittently or the sensor is disconnected.
The sensor may have failed.System Response:The "steering tiller" function will be disabled.Note: This diagnostic code is usually an intermittent condition. The diagnostic code may be active or the diagnostic code may not be active.Note: This procedure can cause new diagnostic codes to be recorded. Ignore these created diagnostic codes. When the procedure is completed, clear the created diagnostic codes.Test Step 1. CHECK FOR POWER AT THE SENSOR.
Do not disconnect the harness connector from the sensor.
At the back of the harness connector for the sensor, insert a 7X-1710 Multimeter Probe along contact 1 (wire U727-WH(White)) for the voltage supply.
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact 1 (wire U727-WH(White)) to contact 2 (wire J765-BU(Blue)). Expected Result:The voltage is 10 DCV.Results:
OK - The voltage is 10 DCV. Proceed to Test Step 3.
NOT OK - The voltage is not 10 DCV. The circuit is open. Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE SIGNAL CIRCUIT OF THE SENSOR.
Turn the key start switch and the disconnect switch