NOZZLE AS 1267539 - Caterpillar

Use this procedure if the following event code is active. Refer to Troubleshooting, "Event Codes" for information about event codes and the default trip points for this code.
Table 1
Event Code    
Description    Conditions which Generate this Code    System Response    
E498(3) Fuel Pressure Present During Initial Cranking     The engine is cranking and the pressure switch for the prelube is closed. The Electronic Control Module (ECM) has energized the Gas Shutoff Valve (GSOV) but the ECM has not energized the fuel actuator solenoid. The air/fuel pressure module detects a differential pressure for fuel to air of at least 0.5 kPa (0.073 psi).     The shutdown output is activated. The code is logged.    Probable Causes
Hydraulic oil pressure switch is open
Air/Fuel pressure module
Fuel pressure is present during initial cranking.
Slow cranking
Cold engine
Excessive load
Incorrect starting position for the air choke
Inlet air restriction
Problem with the air/fuel mixture
Problem with the gas shutoff valve
Electrical connectors or power supply
No signal from the engine speed/timing sensor
Ignition systemRecommended Actions
Hydraulic Oil Pressure Switch Is Open
The hydraulic oil pressure switch contact must close when the engine starts cranking and the hydraulic oil pressure rises. To check the switch contact, perform the following procedure:
Disconnect the engine harness from the hydraulic oil pressure switch.
Connect multimeter leads to the switch outputs "A" and "B".Turn on the continuity function.
Crank the engine.The expected response is continuity between "A" and "B" when the hydraulic oil pressure rises.If there is no continuity between "A" and "B" while the hydraulic oil pressure rises, replace the switch.If the hydraulic oil pressure does not rise, refer to Troubleshooting, "Electrohydraulic System Oil Pressure Is Low".Air/Fuel Pressure Module
Perform a calibration procedure on the Air/Fuel pressure module. Refer to Troubleshooting, "Air/Fuel Pressure Module - Calibrate".Fuel Pressure is Present During Initial Cranking
If fuel pressure is present before the fuel command, the engine will not start.If an unexpected shutdown or a fast shutdown occurred, the fuel actuator may have remained open. If service was performed on the actuator, the actuator may have remained open. Before you crank the engine again, make sure that the actuator is closed.Inspect the fuel actuator and the actuator linkage. Inspect the rod ends for damage and/or for wear. Make sure that the components are fastened securely. Make corrections, if necessary.Make sure that the linkage is adjusted according to the engine Specifications, "Fuel Control".The fuel actuator may be stuck. Make sure that the actuator can move smoothly. Inspect the actuator according to Operation and Maintenance Manual, "Electrohydraulic Actuator - Inspect". Recondition the actuator, if necessary.Slow Cranking
The cranking speed must be sufficient for engine start-up. Inspect the starting system. Make sure that the air supply has sufficient pressure. If the starting motor is suspect, refer to Troubleshooting, "Air Starting Motor Problem".Note: The target minimum cranking speed is 80 rpm.Cold Engine
If the engine is too cold, the engine may not start. Refer to Application and Installation, LEKQ7249, "Ambient Considerations".Excessive Load
Make sure that the load is not excessive. Reduce the load. If necessary, disengage the driven equipment and test the engine.Air