BOX GP-TOOL 2478622 - Caterpillar

ECM sends this voltage to the electronic unit injectors. Do not come in contact with the harness connector for the electronic unit injectors while the engine is operating. Failure to follow this instruction could result in personal injury or death.
Table 2
Troubleshooting Test Steps    Values    Results    
1. Inspect Electrical Connectors and Wiring
A. Turn the isolator switch to the OFF position. A strong electrical shock hazard is present if the isolator switch is not turned OFF.
B. Thoroughly inspect the connectors at the cylinder head. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Perform a
45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with injector solenoids.
D. Check the screw for the ECM connector for the correct torque of
6 N m (53 lb in).
E. Check the harness and wiring for abrasion and for pinch points from the injectors to the ECM.
   
Loose connection or damaged wire
   
Result: There is a fault in a connector or the wiring.
Repair any faulty connectors or replace the wiring harness. Ensure that all of the seals are properly in place and ensure that the connectors are correctly coupled.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly coupled and/or inserted. The harness is free of corrosion, abrasion, and pinch points.
Proceed to Test Step 2.
   
2. Use the "Injector Solenoid Test"
A. Start the engine.
B. Allow the engine to warm up to the normal operating temperature.
C. Stop the engine.
D. Turn the isolator switch to the ON position.
E. Access the "Injector Solenoid Test" by accessing the following display screens in order:
"Diagnostics"
"Diagnostic Tests"
"Injector Solenoid Test"
F. Activate the test.
Note: Do not confuse the "Injector Solenoid Test" with the "Cylinder Cutout Test". The "Cylinder Cutout Test" is used to shut off fuel to a specific cylinder while the engine is running. The "Injector Solenoid Test" is used to actuate the injector solenoids while the engine is not running.
   
"OK", "OPEN", or "SHORT"
   
Result: All cylinders indicate "OK" - There is not an electronic fault with the injectors at this time.
Use the electronic service tool to clear all logged diagnostic codes. Return the engine to service.
Result: "OPEN"
Note the cylinders that indicate "OPEN".
Proceed to Test Step 3.
Result: "SHORT"
Note the cylinders that indicate "SHORT".
Proceed to Test Step 4.
   
3. Check the Harness between the ECM and the Cylinder Head for an Open Circuit
A. Turn the isolator switch to the OFF position. A strong electrical shock hazard is present if the isolator switch is not turned OFF.
B. Disconnect the connector for the suspect injector from the cylinder head.
C. Fabricate a jumper wire
100 mm (4 inch) long with terminals on both ends of the wire.
D. Insert one end of the jumper wire into the terminal for the supply to the suspect injector. Insert the other end of the jumper wire into the terminal for the return circuit for the suspect injector.
E. Turn the isolator switch to the ON position.
F.