VALVE AS-CHECK 3114612 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the fuel metering valve. 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
1446-5 Fuel Metering Module : Current Below Normal The fuel metering valve has detected an excessive current in the circuit for the Pulse Width Modulated signal (PWM signal). The problem was reported to the Electronic Control Module (ECM) over the CAN data link. The code is logged.
The alarm output is activated.
1446-8 Fuel Metering Module : Abnormal Frequency, Pulse Width, or Period The fuel metering valve has detected an error in the PWM signal that is from the ECM.
1446-9 Fuel Metering Module : Abnormal Update Rate The ECM has not received the last ten messages that were expected from the fuel metering valve over the CAN data link.
1446-12 Fuel Metering Module : Failure After the ECM has been powered for 5 seconds, the fuel metering valve has reported that an internal fault has occurred . The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
1446-13 Fuel Metering Module : Calibration Required After the ECM has been powered for 5 seconds, the fuel metering valve has reported that a calibration is necessary for the valve. The code is logged.
The alarm output is activated.
1447-12 Fuel Metering Sensor Module : Failure The fuel metering valve has detected an internal failure of the sensor module. The problem was reported to the ECM over the CAN data link. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
1835-3 Auxiliary Pressure Sensor : Voltage Above Normal The change in pressure across the metering valve is higher than allowed. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
1835-4 Auxiliary Pressure Sensor : Voltage Below Normal The change in pressure across the metering valve is lower than allowed. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
1835-12 Auxiliary Pressure Sensor : Failure The fuel metering valve has detected an error at the internal pressure sensors. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
1836-12 Auxiliary Temperature Sensor : Failure The fuel metering valve has detected an error at the internal temperature sensors. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down. The fuel metering valve is an electronic gas valve that controls the flow of fuel to the engine. The 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 valve converts the command signal and the information into a valve position that directly corresponds to the desired gas flow.