BLADE AS-UNIVERSAL 4Z9374 - Caterpillar

This engine uses high voltage to control the fuel injectors.Disconnect electronic fuel injector enable circuit connector to prevent personal injury.Do not come in contact with the fuel injector terminals while the engine is running.
Remove power from the ECM. A strong electrical shock hazard is present if power is not removed from the ECM.
Disconnect the connectors for the suspect injector(s).
Restore power to the ECM. Note: This test will help the service technician verify that the ECM can fire the solenoids. Do not try to manually crank the engine during this test. The ECM will terminate the "Injector Solenoid Test".
Perform the "Injector Solenoid Test" at least two times. Expected Result:All of the suspect cylinders indicate "Open" on Cat ET.Results:
OK - All cylinders indicate "Open" on Cat ET. The harness between the ECM and the injector connector does not have a short circuit. Proceed to Test Step 9.
Not OK - Cat ET displays "Short" for a right side cylinder. Note the cylinders that indicate "Short". Proceed to Test Step 6.
Not OK - Cat ET displays "Short" for a left side cylinder. Note the cylinders that indicate "Short". Proceed to Test Step 8.Test Step 6. Check the Harness between the ECM and the Customer Connector for a Short Circuit
This engine uses high voltage to control the fuel injectors.Disconnect electronic fuel injector enable circuit connector to prevent personal injury.Do not come in contact with the fuel injector terminals while the engine is running.
Remove power from the ECM. A strong electrical shock hazard is present if power is not removed from the ECM.
Disconnect the wires for the suspect injectors from the customer connector. Refer to Illustration 3 for the terminal locations for the customer connector.
Restore power to the ECM. Note: This test will help the service technician verify that the ECM can fire the solenoids. Do not try to manually crank the engine during this test. The ECM will terminate the "Injector Solenoid Test".
Perform the "Injector Solenoid Test" at least two times. Expected Result:All of the suspect cylinders indicate "Open" on Cat ET.Results:
OK - All cylinders indicate "Open" on Cat ET. The injector wires between the ECM and the customer connector do not have a short circuit.Repair: The short circuit is in the harness between the customer connector and the connector for the suspect injector. Repair the harness or the connector.STOP
Not OK - One or more cylinders indicate "Short" on Cat ET. Note the cylinders that indicate "Short". Proceed to Test Step 8.Test Step 7. Check the Harness between ECM and the Customer Connector for an Open Circuit
This engine uses high voltage to control the fuel injectors.Disconnect electronic fuel injector enable circuit connector to prevent personal injury.Do not come in contact with the fuel injector terminals while the engine is running.
Remove power from the ECM.
Disconnect the wires for the suspect injector from the customer connector.
Fabricate a jumper wire with clips on both ends of the wire.
Install the wire jumper between the suspect injector's power wire and the suspect injector's return wire. This will replace