OPTION AR 3C8170 - Caterpillar

Table 2
Configuration of the Wiring With Terminal 1 Connected to P2-77    
Harness Connector for the Solenoid    P2 Terminal    
Solenoid 1
(1347 Code)     Terminal 1     77    
Terminal 2 111    
Solenoid 2     Terminal 1     61    
Terminal 2 113    
Measure the resistance between terminal 1 and P2-61. The configuration of the wiring is according to Table 3 if the resistance measurement indicates continuity.
Table 3
Configuration of the Wiring With Terminal 1 Connected to P2-61    
Harness Connector for the Solenoid    P2 Terminal    
Solenoid 1     Terminal 1     61    
Terminal 2 113    
Solenoid 2     Terminal 1     77    
Terminal 2 111    
Perform the following procedure if the diagnostic code is 1347-5 or 1347-6.
Disconnect the harness connector for solenoid 2.
Measure the resistance between terminal 1 and P2-61. The configuration of the wiring is according to Table 4 if the resistance measurement indicates continuity. Continue with this procedure if the resistance measurement indicates an open circuit.
Table 4
Configuration of the Wiring With Terminal 1 Connected to P2-61    
Harness Connector for the Solenoid    P2 Terminal    
Solenoid 1     Terminal 1     77    
Terminal 2 111    
Solenoid 2     Terminal 1     61    
Terminal 2 113    
Measure the resistance between terminals 1 and P2-77. The configuration of the wiring is according to Table 5 if the resistance measurement indicates continuity.
Table 5
Configuration of the Wiring With Terminal 1 Connected to P2-77    
Harness Connector for the Solenoid    P2 Terminal    
Solenoid 1     Terminal 1     61    
Terminal 2 113    
Solenoid 2     Terminal 1     77    
Terminal 2 111    Expected Result:The configuration of the wiring has been identified.Results:
Yes - The configuration of the wiring has been identified. Connect the harness connector to the solenoid. If you are troubleshooting a -5 code, proceed to Test Step 3. If you are troubleshooting a -6 code, proceed to Test Step 4.Test Step 3. Check for an Open Circuit
Disconnect the P2 connector.
Measure the resistance between the P2 terminals that are connected to the solenoid that has the diagnostic code.
During the resistance measurement, wiggle the wiring between the P2 connector and the appropriate solenoid on the high pressure fuel pump. Be sure to wiggle the wiring near each connector.Expected Result:The resistance measurement indicates an open circuit. There may be an intermittent connection.Results:
Yes - The resistance measurement indicates an open circuit. There may be an intermittent connection.Repair: Repair the wiring, when possible. Replace parts, if necessary. Verify that the problem is resolved.STOP
No - The resistance measurement does not indicate an open circuit.Repair: Perform the following procedure:
Connect all of the connectors.
Clear any logged diagnostic codes.
Attempt to start the engine.
If the engine starts, look for a -5 diagnostic code.If the code does not return, the problem is resolved. Return the engine to service.If the code returns, connect a test ECM. Check for the diagnostic code again.If the problem is resolved with the test ECM, connect the