AXLE & MTG AR-REAR 2417436 - Caterpillar

codes for the fuel pump relay. Clear any logged diagnostic codes.STOP
Not OK - The -5 diagnostic code remains active with the jumper in place. Verify that the wire at terminal 2 of the connector for the fuel pump relay has continuity to the −Battery. If the return circuit is OK, the open circuit is between the ECM and the connector for the fuel pump relay. Proceed to Test Step 5.Test Step 5. Check the Operation of the ECM
Check the operation of the ECM by creating an open at the ECM connector:
Disconnect the J1/P1 ECM connector.
Remove the wire for the fuel pump relay from P1-10.
Install a wire jumper into the socket for P1-10. Ensure that the wire jumper is not in contact with any other wire in the harness or in contact with engine ground.
Reconnect the ECM connector.
Turn the battery disconnect switch to the ON position.
Select diagnostic tests from Cat ET.
Select the "Override Parameters" screen on Cat ET.
Activate the override for the fuel pump relay.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active.
Deactivate the override for the fuel pump relay.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 70 seconds in order for the diagnostic codes to become active.
Turn the keyswitch to the OFF position.
Check the operation of the ECM by creating a short circuit at the ECM connector:
Install a wire jumper between the jumper wire in P1-10 and the −Battery.
Turn the battery disconnect switch to the ON position.
Select diagnostic tests from Cat ET.
Select the "Override Parameters" screen on Cat ET.
Activate the override for the fuel pump relay.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic code to become active.
Deactivate the override for the fuel pump relay.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 70 seconds in order for the diagnostic codes to become active.
Turn the battery disconnect switch to the OFF position.
Restore the wiring to the original configuration. Expected Result:A -5 diagnostic code is active when the wire for the fuel pump relay is open. A -6 diagnostic code is active when the wire jumper in P1-10 is connected to the −Battery.Results:
OK - The ECM is operating properly. The problem is in the wiring between the ECM and the connector for the fuel pump relay.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOP
Not OK - One of the following conditions exists: The -5 diagnostic code is not active when the wire jumper is open. The -6 diagnostic code is not active when the wire jumper is connected to the −Battery.Repair: There is a problem with the ECM. Perform the following procedure:
Temporarily connect a test ECM. Refer to Troubleshooting, "ECM - Replace".
Recheck the