ROD-TORQUE 4681259 - Caterpillar

Illustration 1 g02726584
Schematic of the Auxiliary Lever #1 Position Sensor
Illustration 2 g01891774
Location of the Auxiliary Control HandleThis diagnostic code is associated with the Auxiliary Lever #1 Position Sensor. The FMI 08 diagnostic means that the ECM has determined that the signal frequency or the signal pulse width is not within the expected range. The sensor is a PWM sensor that operates at a frequency of approximately 500 Hz. The sensor has an operating duty cycle of 5% to 95%. The possible causes of this diagnostic code are listed below:
The sensor has failed.
Intermittent or poor circuit connections
Mechanical devices are loose.
Machine ECM failure. ECM failure is unlikely. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure and in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.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 2204 FMI 08 is active before performing this procedure.System Response:A level 1 warning will be generated. The feature is 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 709-OR) for the voltage supply.
At the back of the harness connector for the sensor, insert a 7X-1710 Multimeter Probe along contact 2 (wire J765-BU) for the ground.
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact 1 (wire 709-OR) to contact 2 (wire J765-BU).Expected Result:The voltage is 10 0.5 DCV.Results:
YES - The voltage is 10 0.5 DCV. Go to Test Step 3.
NO - The voltage is not 10 0.5 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 to the OFF position.
At the back of the harness connector for the sensor, remove the 7X-1710 Multimeter Probe from contact 1 and insert the probe along the signal wire contact 3 (wire J948-PK).
The other 7X-1710 Multimeter Probe remains at the ground wire contact 2 (wire J765-BU).
Turn the disconnect switch and the key start switch to the ON position.
Monitor the signal of the sensor with the multimeter.
Without disconnecting the sensor, or the associated sensor hardware, from the machine, take the sensor through the full operating range.Expected Result:The sensor signal responds as indicated at the beginning of this procedure: 500 Hz, with a 5% to 95% duty cycle.Results:
YES - The sensor signal responds correctly. The sensor is operating correctly. Go to Test Step 3.
NO - The sensor signal does not respond correctly. The sensor has failed.Repair: Replace the joystick handle. Recalibrate if necessary. Refer to Testing