GUIDE ASSEM. 9S1617 - Caterpillar

Use this procedure to troubleshoot a problem with the fuel metering valve. Also, use this procedure if one of the following diagnostic codes is active or easily repeated.
Table 1
J1939 Code and Description Comments
633-7
Engine Fuel Actuator 1 Control Command : Not Responding Properly The Electronic Control Module (ECM) has been notified by the fuel metering valve that it is unable to reach the commanded valve position.
Replace the fuel metering valve.
633-8
Engine Fuel Actuator 1 Control Command : Abnormal Frequency, Pulse Width, or Period The ECM has been notified by the fuel metering valve that the PWM circuit is outside the acceptable range or erratic.
The code is logged.
633-13
Engine Fuel Actuator 1 Control Command : Out of Calibration The fuel metering valve is unable to determine a valid calibration value.
The code is logged.
5418-3
Engine Fuel Actuator #1 : Voltage Above Normal The ECM has been notified by the fuel metering valve that voltage in the power supply circuit is above normal.
The code is logged.
5418-4
Engine Fuel Actuator #1 : Voltage Below Normal The ECM has been notified by the fuel metering valve that voltage in the power supply circuit is below normal.
The code is logged.
5418-5
Engine Fuel Actuator #1 : Current Below Normal The ECM has been notified by the fuel metering valve that current is below normal at the valve keyswitch input.
The code is logged.
5418-12
Engine Fuel Actuator #1 : Failure The ECM has been notified by the fuel metering valve that an internal failure has occurred.
Replace the fuel metering valve. The fuel metering valve is an electronic gas valve that controls the flow of fuel to the engine. The fuel metering valve works with the engine ECM in order to ensure the correct flow of gas in all conditions of engine operation.The ECM sends the desired fuel flow and specific gravity of the gas to the fuel metering valve. The fuel metering valve converts the command signal and the information into a valve position that directly corresponds to the desired gas flow. The position of the fuel metering valve is compensated by these additional factors that are internal to the valve:
A signal for absolute fuel pressure
Differential pressure across the valve
Fuel temperature sensorsThe ECM and the fuel metering valve communicate via the CAN data link. The ECM sends a command signal to the fuel metering valve. The fuel metering valve sends the following information to the ECM: desired valve position, actual valve position and internal fault diagnosis.If the ECM cannot communicate with the fuel metering valve, the ECM activates a 1442-9 diagnostic code. The problem may be with the power supply to the fuel metering valve. This code may be generated for an intermittent problem. After checking the power circuit for the fuel metering valve, refer to Troubleshooting, "CAN Data Link - Test" for information that is related to troubleshooting the data link circuitry.Self-diagnostic FunctionIf an internal fault is detected by the fuel metering valve, the condition is communicated via the CAN data link. The ECM activates a 5418-12 diagnostic code. The most likely cause