HOSE AS 1850829 - Caterpillar

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Shift lever position sensor
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Schematic of the shift lever position sensor
This diagnostic code is associated with the shift lever position sensor. The FMI 08 diagnostic code means that the electronic control module (ECM) has determined that there is an abnormal pulse width.The possible causes of this diagnostic code are listed below:
The sensor has failed.
Intermittent connections or poor connections
Mechanical devices are loose.
A failure of the ECM is unlikely.Note: The following test procedure may create other diagnostic codes. Clear these diagnostic codes when the problem has been corrected. Ensure that the diagnostic code of CID 0702 FMI 08 is active before performing this procedure.Note: Use a calibrated digital multimeter for the measurements in this procedure.Test Step 1. CHECK THE SIGNAL CIRCUIT OF THE SENSOR.
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 multimeter probe from contact 1 (wire 173-RD(Red)) and insert the probe along the contact of the signal wire 3 (wire M997-PU(Purple)).
At the back of the harness connector for the sensor, insert the multimeter probe along the ground wire contact 2 (wire J878-YL(Yellow)).
Turn the disconnect switch and the key start switch to the ON position.
Monitor the signal of the sensor with the digital multimeter.
Without disconnecting the sensor or the hardware that is associated with the sensor from the machine, take the sensor through the full operating range of the sensor.Expected Result:The sensor signal responds in the manner that is described at the beginning of this procedure.Results:
OK - The sensor signal responds correctly. The sensor is operating correctly. Proceed to Test Step 2.
NOT OK - The sensor signal does not respond correctly. The sensor is not operating correctly.Repair: Replace the sensor.STOPTest Step 2. CHECK THE SIGNAL CIRCUIT AT THE ECM.
Turn the key start switch and the disconnect switch to the OFF position.
Insert the multimeter probes into the back of the ECM connector along "J2-35" (wire M997-PU(Purple)) and "J2-22" (wire J878-YL(Yellow)).
Turn the disconnect switch and the key start switch to the ON position.
Monitor the signal of the sensor with the digital multimeter.
Without disconnecting the sensor or the hardware associated with the sensor from the machine, take the sensor through the full operating range.Expected Result:The sensor signal responds in the manner described at the beginning of this procedure.Results:
OK - The sensor signal responds correctly. The sensor is operating correctly. Proceed to Test Step 3.
NOT OK - The sensor signal does not respond correctly. The harness has failed.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE SIGNAL CIRCUIT FOR A SHORT IN THE HARNESS.
The key start switch and the disconnect switch remain in the OFF position.
Disconnect the machine harness connectors from the sensor and the ECM.
Measure the resistance between contact "J2-35" (wire M997-PU(Purple)) and all contacts that are used in the machine harness connectors for the ECM.Expected Result:The resistance is greater than 5000 ohms.Results:
OK