TERMINAL 2221319 - Caterpillar

Illustration 1 g01354071
Connections of the position sensor for the tilt cylinder
This diagnostic code is recorded when the ECM determines that the signal of the position sensor for the tilt cylinder has an abnormal pulse width.The sensor is a PWM sensor that operates at a frequency of approximately 500 hertz. The sensor has an operating duty cycle of 5% to 95%.The possible causes for this diagnostic code are listed:
The circuit for the +battery to the sensor has a intermittent connection.
The return circuit from the sensor has a intermittent connection.
The signal circuit from the sensor has a intermittent connection.
The sensor has failed.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1965 FMI 08 is active before performing this procedure.Use a digital multimeter for the measurements in the procedure.System Response:The tilt features will be disabled until the diagnostic code is cleared.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 multimeter probe along contact 1 (wire 709-OR(Orange)) for the voltage supply.
At the back of the harness connector for the sensor, insert a multimeter probe along contact 2 (wire J764-BR(Brown)) 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(Orange)) to contact 2 (wire J764-BR(Brown)). Expected Result:The voltage is 10 0.5 DCV.Results:
OK - The voltage is 10 0.5 DCV. Proceed to Test Step 3.
NOT OK - 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 multimeter probe from contact 1 and insert the probe along contact 3 (wire H709-BU(Blue)).
The other multimeter probe remains at the ground wire contact 2 (wire J764-BR(Brown)).
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 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's signal responds in the manner that is described at the beginning of this procedure.Results:
OK - The sensor's signal responds correctly. The sensor is operating correctly. Proceed to Test Step 3.
NOT OK - The sensor's signal does not respond correctly. The sensor has failed.Repair: Replace the sensor. Calibrate the sensor. Refer to the Testing and Adjusting, KENR5177, "Calibration" procedure. Verify that the new sensor corrects the problem.STOPTest Step 3. 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 J2-25