COVER AS-AIR CLEANER 3496267 - Caterpillar

Electrical shock hazard. The electronic unit injector system uses 67-73 volts.
Turn the keyswitch to the OFF position. A strong electrical shock hazard is present if the keyswitch is not turned OFF.
Disconnect the connectors from the valve cover base.
Turn the keyswitch to the ON position.
Perform the "Injector Solenoid Test" at least two times.Expected Result:All cylinders indicate "Current Below Normal".Results:
OK - All cylinders indicate "Current Below Normal". Proceed to Test Step 7.
Not OK - One or more cylinders indicate "Current Above Normal". Note the cylinders that indicate "Current Above Normal". Proceed to Test Step 8.Test Step 7. Check the Engine Harness Under the Valve Cover for a Short Circuit
Electrical shock hazard. The electronic unit injector system uses 67-73 volts.
Turn the keyswitch to the OFF position. A strong electrical shock hazard is present if the keyswitch is not turned OFF.
Remove the valve cover.
Disconnect each of the injectors that indicate a "Short" from the wiring harness. Ensure that each of the connectors from the disconnected injector harness does not touch any other components.
Turn the keyswitch to the ON position.
Perform the "Injector Solenoid Test" at least two times.Expected Result:All of the injectors that were disconnected indicate "Current Below Normal".Results:
OK - All of the injectors that were disconnected indicate "Current Below Normal". Proceed to Test Step 8.
Not OK - One or more of the injectors that were disconnected indicate "Current Above Normal". Proceed to Test Step 9.Test Step 8. Check for a Short Circuit in the Return Wire
Electrical shock hazard. The electronic unit injector system uses 67-73 volts.
Turn the keyswitch to the OFF position. A strong electrical shock hazard is present if the keyswitch is not turned OFF.
Disconnect the connector P2 from the ECM.
Locate the terminal for the return of the faulty injector in the connector P2. Measure the resistance from the terminal to the engine ground stud.Expected Result:The resistance is greater than 10 Ohms.Results:
OK - The resistance is greater than 10 Ohms.Repair: Reconnect connector P2.Replace the faulty injector.Use the electronic service tool in order to clear all logged diagnostic codes.Perform the "Injector Solenoid Test".Verify that the repair eliminates the fault.STOP
Not OK - There is a short in the return line.Repair: Disconnect the connectors from the valve cover base.Measure the resistance of the return wire between connector P2 and the engine ground stud.If the resistance is less than 10 Ohms, the fault is in the return wire between the ECM and the valve cover base.If the resistance is greater than 10 Ohms, the fault is in the return wire under the valve cover.Repair the injector harness or replace the injector harness.Use the electronic service tool in order to clear all logged diagnostic codes and then perform the "Injector Solenoid Test" in order to verify that the repair eliminates the fault.STOPTest Step 9. Check the ECM for Proper Operation
Electrical shock hazard. The electronic unit injector system uses 67-73 volts.
Remove the electrical power from the ECM.
Fabricate a jumper that is long enough to reach from the P2 ECM connector to the engine ground stud. Crimp a