ROD AS-PISTON 2748127 - Caterpillar

Illustration 2 g01254278
(1) Left steering cylinder (2) Right steering cylinder (3) Connector for steering position sensor on the back side of the cylindersThis diagnostic code is associated with the position sensor for the right steering cylinder. The position sensor provides a PWM input signal to the Implement ECM 2 and to the Transmission/Chassis ECM. The FMI 00 diagnostic code is activated when the ECM receives a valid signal from the sensor, but the signal is above the high limit for the expected signal range.The sensor is a PWM sensor that operates at a frequency of approximately 500 Hz. The duty cycle of the PWM signal that is supplied to the ECM is measured in small increments. The changes in the duty cycle of the sensor cannot be measured with a digital multimeter.The following conditions could cause this diagnostic code to be activated:
Mechanical devices are broken or loose.
The sensor has failed.
The ECM has failed. An ECM failure is unlikely.Note: Before performing this procedure, check for an active CID 0041 diagnostic code for the 8 V sensor power supply of the ECM. Correct any problem with the 8 V power supply before performing this procedure.Note: The Transmission/Chassis ECM (MID 027) and the Implement ECM 2 (MID 145) receive an input signal from the position sensor of the right steer cylinder. Both of the electronic control modules can activate a CID 2201 FMI 00 diagnostic code when the signal is above the normal range.
If one ECM has activated a CID 2201 FMI 00 diagnostic code and the other ECM has not activated the 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 of the electronic control modules have activated the diagnostic code, either the sensor or a harness problem could be the cause.
If both the electronic control modules have activated the diagnostic code, it is unlikely that either ECM is causing the problem.
For either condition, proceed with this procedure in order to verify the cause of the problem.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. Inspect the connections for the following:
Connections are clean.
Connections are secure.
Connections are in good condition.Note: 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. Clear the diagnostic codes when the original diagnostic code has been corrected. Test Step 1. CHECK THE MECHANICAL CONNECTIONS
Turn the disconnect switch to the OFF position.
Turn the key start switch to the OFF position.
Visually inspect the mechanical connections for the right steering cylinder. Verify the following:
All mechanical connections and adjustments for