SEAL,DUST 1982952 - Caterpillar

This procedure covers the following diagnostic codes:
Table 1
Diagnostic Codes for the SCV Solenoid Valves
J1939 Code Code Description Comments
1347-3 Engine Fuel Pump Pressurizing Assembly #1 : Voltage Above Normal The Electronic Control Module (ECM) detects the following conditions:
High voltage in the output from the ECM to the Suction Control Valve (SCV) solenoid for 0.7 seconds
There are no active 168 diagnostic codes.
The ECM has been powered for at least 2.0 seconds.
The warning lamp will come on. The ECM will log the diagnostic code.
This diagnostic code detects a fault in the circuit for the SCV solenoid.
1347-4 Engine Fuel Pump Pressurizing Assembly #1 : Voltage Below Normal The Electronic Control Module (ECM) detects the following conditions:
Low voltage in the output from the ECM to the Suction Control Valve (SCV) solenoid for 0.7 seconds
There are no active 168 diagnostic codes.
The ECM has been powered for at least 2.0 seconds.
The warning lamp will come on. The ECM will log the diagnostic code.
This diagnostic code detects a fault in the circuit for the SCV solenoid. This fault is most likely to be caused by a high side short to ground or a low side short to power.
1347-7 Engine Fuel Pump Pressurizing Assembly #1 : Not Responding Properly The ECM detects the following conditions:
Actual fuel rail pressure is 10 MPa (1450 psi) higher than the target pressure.
There are no active 157 diagnostic codes.
There are no active 3597 diagnostic codes.
There are no other active 1347 diagnostic codes.
The ECM has been powered for at least 2 seconds.
The warning lamp will come on. The diagnostic code will be logged.
The engine will be derated when this diagnostic code is active.
This diagnostic code detects a fault in the Suction Control Valve (SCV) that is most likely to be a stuck valve.
Follow the troubleshooting procedure to identify the root cause of the fault. The following background information is related to this procedure:Suction Control Valve (SCV) for the High-Pressure Fuel PumpThe high-pressure fuel pump is equipped with a suction control valve. The suction control valve precisely controls the amount of fuel that enters the high-pressure fuel pump.The amount of fuel that is required is calculated by the software that is contained in the ECM. The solenoid in the suction control valve is controlled by a PWM signal from the ECM.
Illustration 1 g03840648
Schematic for the suction control valve solenoid
Illustration 2 g03841114
Typical example of the high-pressure fuel pump
(1) Solenoid for the Suction Control Valve (SCV)
Illustration 3 g03841117
Connector for the SCV solenoid
(1) Signal
(2) Return
Table 2
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Thoroughly inspect the terminal connections on the P1/J1 ECM connector and the SCV solenoid. Refer to Troubleshooting, "Electrical Connectors - Inspect".
B. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the active diagnostic code.
C. Perform a 45 N (10 lb) pull test on each of the wires in the solenoid connectors that are associated with the active diagnostic code.
D. Check the harness for corrosion, abrasion, and pinch points from the solenoids to the