TUBE AS 3151418 - Caterpillar

Illustration 1 g01660014
Schematic of the "Swing Position" sensorThis diagnostic code is associated with the position sensor "(Hoe Swing)". The FMI 08 means that the ECM has determined that the signal frequency or the signal pulse width is not within the expected range. The position sensor is a PWM sensor that operates at a frequency of approximately 500 hertz. The sensor has an operating duty cycle of 10% to 90%. The possible causes of this diagnostic code are listed below:
The sensor has failed.
Intermittent connections or poor connections
Mechanical devices are loose.
The ECM has failed. This is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 2108 FMI 08 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure. System Response:The diagnostic code of CID 2108 FMI 08 will be logged in the internal memory of the ECM and a level 1 warning is generated. All implement functions will be disabled.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 799-WH) for the voltage supply.
Turn the key start switch and the disconnect switch to the ON position.
Move the linkage through the full range of motion while keeping the multimeter connected contact 1 (wire 799-WH) voltage supply and contact 2 (wire J766-PU) ground to ensure power and ground throughout the range of motion.
Measure the voltage from contact 1 (wire 799-WH) to contact 2 (wire J766-PU).Expected Result:The voltage is 10 Volts DC.Results:
OK - The voltage is 10 Volts DC. Proceed to Test