BUSHING 5H3439 - Caterpillar

the connector for the Electric Fuel Lift Pump (EFLP) relay.
Measure the resistance between P1:36 and all the other pins on the P1 connector.Expected Result:The resistance between P1:36 and all the other pins on the P1 connector should be more than 10,000 Ohms.Results:
OK - The resistance measurements are all more than 10,000 Ohms. The wiring between the EFLP relay and the ECM is not shorted to any other wire. There may be a fault with the ECM. Proceed to Test Step 8.
Not OK - One or more of the resistance measurements was less than 10,000 Ohms. The short is in the wiring between the EFLP relay and the ECM.Repair: Perform the following repair:
Repair the faulty wiring or replace the faulty wiring.
Turn the keyswitch to the ON position. Do not start the engine. Check for active diagnostic codes.
Wait for at least 2 minutes for the EFLP to deactivate. Check for active diagnostic codes.
Confirm that the fault has been eliminated.STOPTest Step 8. Check the ECM
Make sure that the latest flash file for the application is installed in the ECM. Refer to Troubleshooting, "Flash Programming".
Contact the Technical Communicator at a Cat dealer.Note: This consultation can greatly reduce the repair time.
If the Technical Communicator recommends the use of a test ECM, install a test ECM. Refer to Troubleshooting, "Replacing the ECM".
Use the electronic service tool in order to clear all logged diagnostic codes.
Turn the keyswitch to the ON position. Do not start the engine. Check for active diagnostic codes.
Wait for at least 2 minutes for the Electric Fuel Lift Pump (EFLP) to deactivate. Check for active diagnostic codes.Results:
There are no active 3666 diagnostic codes - The replacement ECM functions correctly.Repair: Perform the following procedure:
Reconnect the suspect ECM.
If the fault returns with the suspect ECM, replace the ECM.
Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.STOP
Not OK - The fault is still present with the replacement ECM. Do not use the replacement ECM.Repair: Contact the Technical Communicator at a Caterpillar dealer.STOPTest Step 9. Check the Fuse
Turn the keyswitch to the ON position. Wait for 5 seconds.
Turn the keyswitch to the OFF position. Check the fuse for the Electric Fuel Lift Pump (EFLP). Refer to Illustration 1.Results:
The fuse is blown. - There is a short in the circuit for the EFLP. Do not replace the fuse at this stage. Proceed to Test Step 10.
The fuse is not blown. - There may be an open circuit in the circuit for the EFLP. Proceed to Test Step 13.Test Step 10. Disconnect the Relay Connector
Disconnect the connector for the Electric Fuel Lift Pump (EFLP) relay.
Replace the fuse for the EFLP. Wait for 5 seconds.
Check the fuse.Results:
The fuse is blown. - The fault is in the wiring between Test Point A on the relay and battery+.Repair: Repair the faulty wiring or replace the faulty wiring. Replace the fuse. Turn the keyswitch to the ON position to verify that the repair eliminates the fault.STOP
The fuse is not