CONTROL GP-HANDLE 2974587 - Caterpillar

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Connections of "Right Steering Cylinder" position sensor
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(1) Left Steering Cylinder
(2) Right Steering Cylinder
(3) "Steering Position Sensor" connector on the back side of the cylinders This diagnostic code is associated with the "right steering cylinder" position sensor. The position sensor provides a PWM input signal to the Implement ECM and to the Transmission/Chassis ECM. The FMI 04 diagnostic code is activated when the ECM reads the input signal from the sensor and the voltage of the signal is below normal.The sensor is a PWM sensor that operates at a frequency of approximately 500 hertz. The duty cycle of the PWM signal that is supplied to the ECM is measured in very small increments. The changes in the duty cycle of the sensor can not be measured with a digital multimeter.The possible causes of this diagnostic code are listed below:
The signal circuit is shorted to a ground source.
The sensor has failed.
The ECM has failed. This is unlikely. Before performing this procedure, check for an active CID 0041 diagnostic code for the 8 volt sensor power supply of the Implement ECM (MID 082). Correct any problem with the 8 volt power supply before performing this procedure.Note: The Transmission/Chassis ECM (MID 027) and the Implement ECM (MID 082) receive an input signal from the "left steer cylinder" position sensor. Both ECM modules can activate a CID 2201 FMI 04 diagnostic code when the signal is below normal. If one ECM has activated a CID 2201 FMI 04 diagnostic code and the other ECM has not activated a diagnostic code, it is likely that the sensor is operating correctly. When this occurs, a poor connection in the machine harness would be suspected. When both ECM modules have activated the diagnostic code, either the sensor or a harness problem could be the cause. If both ECM modules have activated the diagnostic code, it is very unlikely that either ECM is causing the problem. For either condition, proceed with this procedure in order to verify the cause of the problem.Note: Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections are often 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 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.Test Step 1. CHECK THE SENSORTurn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector from the "right steering cylinder" position sensor and disconnect the machine harness connector from the "left steering cylinder" position sensor. Mark the harness connector for the "right steering sensor".
Connect the marked connector for the "right steering sensor" to the connector for the