BEARING 6K3194 - Caterpillar

Use this procedure to troubleshoot a problem with the fuel control valve. Also, use this procedure if one of the following diagnostic codes is active or easily repeated.
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 FCV and the Electronic Control Module (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 FCV has been detected.
1076-12
Engine Fuel Injection Pump Fuel Control Valve : Failure 18-12
Fuel Control Valve : Failure A failed 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 g06054871
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. 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 active or logged.
Repair: A failed fuel control valve (FCV) has been detected. Perform the following procedure:
1. 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.
2. Verify the "Fuel Rail Pressure" reading in Cat ET is 0 8 MPa (0 1160 psi) prior to servicing the fuel system.
3. Replace the FCV.
Proceed to Test Step 9.
Result: An 18-8 or 1076-8 code is active or logged.
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 Electronic Control Module (ECM) and the FCV for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the FCV from the wiring harness.
C. Disconnect the E-C3 ECM connector from the engine ECM.
D. Measure the resistance between the following:
- Pin 55 (EL-C1 ECM connector) and