FORK ASSEM. 7M0859 - Caterpillar

Use this procedure to troubleshoot the fuel system if a problem is suspected with the throttle actuator. Also use this procedure if one of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table    
Description    Conditions which Generate this Code    System Response    
5419-2 Engine Throttle Actuator #1 : Erratic, Intermittent, or Incorrect     The throttle actuator has reported that a calibration has been attempted and the calibration has failed.     The code is logged.
The amber warning lamp is activated.    
5419-7 Engine Throttle Actuator #1 : Not Responding Properly     The throttle actuator has reported that there is a mismatch between the requested throttle position and the actual position of the throttle.    
5419-12 Engine Throttle Actuator #1 : Failure     The throttle actuator has reported an internal failure.    
5419-13 Engine Throttle Actuator #1 : Calibration Required     The throttle actuator has reported that a calibration attempt has failed. The actuator cannot find the end stop.    The throttle actuator works with the Electronic Control Module (ECM) to ensure the correct throttle position during all engine operating conditions.The ECM controls the position of the throttle from a fully closed position to a fully opened position.CommunicationsThe ECM and the throttle actuator communicate via the CAN data link. The ECM sends a command signal to the actuator. The actuator sends the following information to the ECM: desired actuator position, actual actuator position and internal fault diagnosis.If the ECM cannot communicate with the actuator, the ECM activates a 51-9 diagnostic code. This problem may be a problem with the power supply to the actuator. This code may be generated for an intermittent problem. After checking the power