BLOCK 5078318 - Caterpillar

terminal locations.
Connect the J2/P2 ECM connectors.
Restore the electrical power to the engine. Set the ECS to the STOP position.Note: The 17-5 Engine Fuel Shutoff Valve #1 : Current Below Normal can only be detected when the output for the start command is off. The output is normally off when the ECS is in the STOP position and the engine speed is zero rpm.
Monitor the active diagnostic code and the logged diagnostic codes on Cat ET. Wait at least 30 seconds in order for diagnostic codes to become active. Check for an active 17-5 Engine Fuel Shutoff Valve #1 : Current Below Normal.
Attempt to start the engine. If the engine starts, set the ECS to the STOP position after the engine reaches idle speed.Note: The 17-6 Engine Fuel Shutoff Valve #1 : Current Above Normal can only be detected when the output for the start command is on. The output is normally on when the ECS is switched from the STOP position to the START position. The output remains on during engine cranking.
Turn the ECS to the OFF/RESET position. Remove the electrical power from the engine.Expected Result:The 17-5 diagnostic code is no longer active and the 17-6 diagnostic code became active with the jumper wire installed.Results:
OK - The 17-5 diagnostic code is no longer active and the 17-6 diagnostic code became active.Repair: The ECM detects the jumper wire that is installed at the P2 ECM connector. There is an open circuit in the wiring harness between the ECM connector and the harness connector for the fuel control valve. The problem could be with one of the emergency stop switches. Check for proper operation of the switches. Perform the necessary repairs. Verify that the repair resolves the original problem.STOP
Not OK - A 17-5 diagnostic code remains active with the jumper wire installed at the ECM connector.Repair: The ECM did not detect the short circuit. There appears to be a problem with the ECM. Before you consider replacing the ECM, consult with the Dealer Solutions Network (DSN).STOPTest Step 6. Check for a Short Circuit to the +Battery in the Harness Circuit at the ECM Connector
Turn the engine control switch to the OFF/RESET position. Remove the electrical power from the engine.
Disconnect the J2/P2 ECM connectors.
At the P2 ECM connector, use a multimeter to check for a voltage on the harness between terminal locations P2-11 and P2-21.
Restore the electrical power to the engine. Turn the ECS to the STOP position.
With the ECS in the STOP position, use a multimeter to check for a voltage on the harness between terminal locations P2-11 and P2-21.
Turn the ECS to the OFF/RESET position. Remove the electrical power from the engine.
Connect the J2/P2 ECM connectors.Expected Result:Voltage