ANTENNA GP-SOOT 4543408 - Caterpillar

Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit for the fuel actuator.
Check the harnesses and the wiring for abrasion and for pinch points from the fuel actuator to the ECM.Expected Result:The connectors, pins, and sockets are connected properly. The connectors and the wiring do not have corrosion, abrasion, or pinch points.Results:
OK - The components are in good condition with proper connections. Proceed to Test Step 2.
Not OK - The components are not in good condition and/or at least one connection is improper.Repair: Perform the necessary repairs and/or replace parts, if necessary.STOPTest Step 2. Check the Operation of the Fuel Actuator
If the engine is running, stop the engine.
Remove the electrical power from the engine.
Observe the fuel actuator. Restore the electrical power to the engine. Check the pointer of the actuator during the self test.Expected Result:The pointer is at zero percent for approximately three seconds. Then, the pointer smoothly moves to 100 percent. The pointer remains at 100 percent for approximately three seconds. Then, the pointer moves to zero percent.Results:
OK - The actuator correctly performs the self test.Repair: Start the engine and run the engine. Operate the engine at various speeds and loads. Verify that there are no diagnostic codes for the fuel actuator. If there are no codes for the fuel actuator, the problem is resolved. STOP. If there are diagnostic codes for the fuel actuator, proceed to Test Step 3.
Not OK - The pointer for the actuator does not move or the pointer's movement is erratic. Proceed to Test Step 3.
Not OK - The pointer immediately moves to 100 percent. The pointer remains at 100 percent for several seconds. Then, the pointer moves to zero percent.Repair: The signal wires for the fuel actuator are reversed.Identify the location of the faulty connections. Connect the wires correctly. Verify that the original problem is resolved.STOPTest Step 3. Check the Linkage Between the Fuel Actuator and the Fuel Valve
Remove the electrical power from the engine.
Inspect the linkage between the fuel actuator and the fuel valve. Move the linkage throughout the entire range. Check the linkage for binding. Verify that the pointer moves smoothly from zero percent to 100 percent.Expected Result:The linkage does not bind. The pointer moves smoothly throughout the entire range.Results:
OK - The linkage does not bind. The pointer moves smoothly throughout the entire range. Proceed to Test Step 4.
Not OK - There is binding in the linkage. The linkage does not move smoothly throughout the entire range.Repair: Repair the linkage. Refer to the engine's Disassembly and Assembly manual. STOPTest Step 4. Check for an Open Circuit
Disconnect the following connectors:
P2 connector
Connector for the fuel actuator
Measure the resistance between the points that are listed in Table 1. During each measurement, wiggle the wires in the harness in order to check for an intermittent problem. Be sure to wiggle the wires near each of the connectors.
Table 1
Resistance Measurements for the Harness for the Fuel Actuator    
Terminal on the P2 Connector