JAW- 4993836 - Caterpillar

Illustration 1 g02453309
Implement Rotary Position Sensors (1) Rotary tilt position sensor located on the right-hand side tilt linkage member - shown with cover removed
Illustration 2 g02651077
Implement ECM connections of the Rotary Tilt (Linkage) Position SensorThis diagnostic code is recorded when the Implement ECM reads the Rotary Tilt (Linkage) Position Sensor and the voltage of the signal is below normal. The sensor is located on the right-hand side frame of the tilt linkage.The position sensor is supplied system voltage through the right column, fuse F39 in the switched upper fuse panel (10A 146-GY). The sensor is supplied an ECM ground circuit (C214-BK) connection from the Implement ECM J1-70 contact and the Machine ECM J1-70 contact.The position sensor is a PWM sensor that operates at a frequency of approximately 500 100 Hz. The position sensor sends a PWM input signal to the ECM. The duty cycle of the signal will vary from 5% to 95%. The variations in the duty cycle signal are shown in the following table:
Table 1
Rotary Tilt Position Sensor     Acceptable Sensor PWM Duty Cycle (Percent)    
Tilt Back - Minimum Calibration Value     5    
Tilt Back - Maximum Calibration Value     50    
Dump - Minimum Calibration Value     45    
Dump - Maximum Calibration Value     95    The possible causes of this diagnostic code are listed:
The linkage is loose or damaged.
The signal circuit is shorted to a ground.
The sensor has failed.
The ECM has failed. This condition is unlikely. Note: An incorrect tilt linkage position sensor signal can cause engine stall at low RPM, when the tilt cylinder reaches end of stroke.Note: Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, that all connections are secure and that all connections are 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 sensor, actuator, and the linkage for each sensor should be checked for tightness or damage on a regular schedule. Ensure that a problem with the sensor linkage is not the cause of the problem if a diagnostic code is activated for a specific sensor.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the problem has been corrected.Test Step 1. CHECK THE SENSOR
Turn the disconnect switch and the key start switch to the ON position.
Disconnect the machine harness connector from the rotary tilt position sensor. Observe the status of the active CID 0351 FMI 04 diagnostic code.Expected Result:The status of the CID 0351 FMI 04 diagnostic code did not change when the connector for the sensor was disconnected. A CID 0351 FMI 03 diagnostic code has not been activated by the ECM. The CID 0351 FMI 04 diagnostic code remains active when the sensor connector is disconnected.Results:
OK