KIT-GASKET-ACL 2842314 - Caterpillar

Use this procedure to troubleshoot the electrical system if a problem is suspected with the fuel control valve. Also, use this procedure if one of the diagnostic codes in Table 1 is active.
Table 1
J1939 Code and Description CDL Code and Description Comment
1076-7
Engine Fuel Injection Pump Fuel Control Valve : Not Responding Properly 18-7
Fuel Control Valve : Not Responding Properly The commanded Fuel Control Valve (FCV) position does not match the actual FCV position.
1076-8
Engine Fuel Injection Pump Fuel Control Valve : Abnormal Frequency, Pulse Width, or Period 18-8
Fuel Control Valve : Abnormal Frequency, Pulse Width, or Period The PWM signal between the Fuel Control Valve (FCV) and the ECM has been lost.
1076-11
Engine Fuel Injection Pump Fuel Control Valve : Other Failure Mode 18-11
Fuel Control Valve : Other Failure Mode A failed Fuel Control Valve (FCV) has been detected.
1076-12
Engine Fuel Injection Pump Fuel Control Valve : Failure 18-12
Fuel Control Valve : Failure A failed Fuel Control Valve (FCV) has been detected.
3597-6
ECU Power Output Supply Voltage #1 : Current Above Normal 1028-6
Power Supply Control 1 : Current Above Normal A failed power supply to the fuel control valve has been detected.
Illustration 1 g06090796
All the electrical connectors may not be shown. Refer to the schematic for more detail.
Note: Refer to Troubleshooting, "Electrical Connectors" for an Illustration of the ECM and Connectors.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Apply electrical power to the engine.
B. Connect Cat® Electronic Technician (ET) to the service tool connector.
C. Determine if a code is active or logged.
Codes
Result: An 18–7, 18–11, 18–12, 1076–7, 1076–11 or 1076-12 code is present.
Repair: A failed fuel control valve (FCV) has been detected.
Release the pressure in the high-pressure rail by loosening the end plug on one of the last two fuel accumulators. Refer to Testing and Adjusting, "Fuel Rail Pressure - Release" for instructions on how to release the pressurized fuel.
Verify the "Fuel Rail Pressure" reading in ET is 0 8 MPa (0 1160 psi) prior to servicing the fuel system.
Replace the fuel control valve (FCV).
Proceed to Test Step 9.
Result: An 18–8 or 1076-8 code is present.
Proceed to Test Step 2.
Result: A 1028–6 or 3597-6 code is active.
Proceed to Test Step 5.
2. Check the Wiring Between the ECM and the Fuel Control Valve