C27 Engine for the AD55B Underground Articulated Truck Fuel Filter Is Restricted Caterpillar

Fuel Filter Is Restricted

C27 Engine for the AD55B Underground Articulated Truck [KENR5424]

C27 Engine for the AD55B Underground Articulated Truck Exhaust Has Excessive White Smoke

C27 Engine for the AD55B Underground Articulated Truck Electronic Service Tool Does Not Communicate

FUEL SYSTEM

FILTER GP-FUEL

C27 Engine for the AD55B Underground Articulated Truck Fuel Filter Differential Pressure - Test

C27 Engine for the AD55B Underground Articulated Truck Fuel Filter Is Restricted

1.1. Probable Causes

2.1. Recommended Actions

3.2. Fuel Filter Element

4.2. Electrical Connector

The Electronic Control Module (ECM) detects an abnormal fuel filter differential pressure.

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. You must access the monitoring system on AVSpare Electronic Technician (ET) in order to view the current trip point for this code.

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Table 1
Event Code
Code and Description	Conditions which Generate this Code	System Response
E390(1) Fuel Filter Restriction	The difference between the filtered fuel pressure and the unfiltered fuel pressure is greater than the trip point pressure. The delay time for this event code is one hour.	The code is logged.
E390(2) Fuel Filter Restriction	The difference between the filtered fuel pressure and the unfiltered fuel pressure is greater than the trip point pressure. The delay time for this event code is four hours.	The engine ECM will derate engine power. The code is logged.

Probable Causes

Fuel filter element
Electrical connector

Recommended Actions

Fuel Filter Element

Replace the fuel filter element.

Restart the engine.

The delay time for the E390(1) event code is one hour. If the event code becomes active after recently changing the fuel filter, the problem may be electrical. Refer to Troubleshooting, "Fuel Filter Differential Pressure - Test" for the procedure to troubleshoot the circuit.