PLUG-ORIFICE 1407157 - Caterpillar

Illustration 1 g02329837
Schematic of the "Stick Out Control Pressure" Sensor
This diagnostic code is associated with the "Stick Out Control Pressure" Sensor. The FMI 08 diagnostic code means that the ECM has determined that the signal frequency is not within the expected range.The "Stick In Control Pressure" Sensor has an output frequency of approximately 500 Hz. The duty cycle of the signal changes as the position of the stick is changed. The duty cycle varies from approximately 19% at the minimum position to approximately 77% at the maximum position. The duty cycle is approximately 48% at the center position.The possible causes of this diagnostic code are listed below:
The "Stick Out Control Pressure" Sensor has failed.
Intermittent connections or poor connections.
The ECM has failed. An ECM failure 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 3545 FMI 08 is active before performing this procedure.Note: Use the 257-9140 Fluke Digital Multimeter or the equivalent for the measurements in this procedure.Test Step 1. CHECK FOR POWER AT THE "STICK IN CONTROL PRESSURE" SENSOR.
Do not disconnect the harness connector from the joystick.
Turn the key start switch and the disconnect switch to the ON position.
At the back of the harness connector for the joystick, insert a 7X-1710 Multimeter Probe along the voltage supply wire J850-WH(White).
Measure the voltage from the voltage supply wire (J850-WH(White)) to frame ground.Expected Result:The voltage is approximately 8 VDC.Results:
OK - The voltage is approximately 8 VDC. Proceed to Test Step 2.
NOT OK - The voltage is not approximately 8 VDC. The circuit is open.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE SIGNAL CIRCUIT OF THE "STICK IN CONTROL PRESSURE" SENSOR FOR THE CORRECT DUTY CYCLE.
Turn the key start switch and the disconnect switch to the OFF position.
At the back of the harness connector for the sensor, remove the 7X-1710 Multimeter Probe from the supply wire (J850-WH(White)) and insert the probe along the signal wire M813-BU(Blue).
At the back of the harness connector for the sensor, insert a 7X-1710 Multimeter Probe along the ground wire 235-BK(Black).
Turn the disconnect switch and the key start switch to the ON position.
Monitor the duty cycle of the "Stick Out Control Pressure" Sensor with the 257-9140 Fluke Digital Multimeter.
Without disconnecting the joystick or the hardware that is associated with the joystick from the machine, move the joystick control through the entire range of motion.Note: On some machines, starting the engine may be necessary to move the joystick control through the entire range of motion.Expected Result:The duty cycle value of the joystick control responds in the manner that is described at the beginning of this procedure.Results:
OK - The duty cycle value of the joystick control responds correctly. The "Stick Out Control Pressure" Sensor is operating correctly. Proceed to Test Step 3.
NOT OK - The duty cycle value of the joystick control does