LINES GP-FUEL INJECTION 1338997 - Caterpillar

Illustration 2 g00725355
Schematic for the injection actuation pressure sensor
Illustration 3 g00725426
Locations for the ECM terminals on connector P2Test Step 1. Check for Active Diagnostic Codes
Connect the Caterpillar Electronic Technician (Cat ET) to the data link connector.
Turn the key switch to the ON position.Note: If the 164-02 Injection Actuation Pressure Signal Erratic (15) is not active or logged, try to start the engine.Note: If 164-03 Injection Actuation Pressure Voltage High (15) or 164-04 Injection Actuation Pressure Voltage Low (15) is active, refer to Troubleshooting, "Engine Pressure Sensor Open or Short Circuit-Test".Expected Result:164-02 Injection Actuation Pressure Signal Erratic is active.Results:
Yes - The engine will not start. 164-02 Injection Actuation Pressure Signal Erratic is active. Proceed to Test Step 2.
No - The engine will not start. 164-02 Injection Actuation Pressure Signal Erratic is not active. Proceed to Test Step 2.
No - 164-02 is not active. The engine starts. The system is operating correctly at this time.STOPTest Step 2. Disconnect the Injection Actuation Pressure Sensor and Start the Engine
Turn the key switch to the OFF position.
Disconnect the electrical connector J204/P204 for the injection actuation pressure sensor from the engine harness.
Try to start the engine.Expected Result:The engine starts.Results:
Yes - Proceed to Test Step 3.
No - Repair: Reconnect the electrical connector J204/P204 for the injection actuation pressure sensor to the engine harness. Refer to Troubleshooting, "Engine Cranks but Will Not Start".STOPTest Step 3. Inspect Electrical Connectors and Wiring
Thoroughly inspect the connector J204/P204 for the injection actuation pressure sensor and inspect the ECM engine harness connector J2/P2. Refer to Troubleshooting, "Electrical Connectors-Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the injection actuation pressure sensor (P2:61 and P2:62).
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the harness and wiring for abrasion and for pinch points from the sensors back to the ECM.Expected Result:All connectors, pins and sockets should be completely coupled and/or inserted and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:
OK - Proceed to Test Step 4.
Not OK - Repair: Perform the following repair:Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 4. Check the Status of the Sensor with the Engine OFF
Connect Cat ET to the data link connector.
Turn the key switch to the ON position.
Check the injection actuation pressure on the status screen of Cat ET.Note: The following codes will cause the injection actuation pressure sensor to default to 17500 kPa (2538 psi).
164-03 Injection Actuation Pressure Voltage High (15)
164-04 Injection Actuation Pressure Voltage Low (15)
232-03 5 Volt Supply Voltage High (21)
232-04 5 Volt Supply Voltage Low (21)Expected Result:The injection actuation pressure sensor indicates 0 kPa (0 psi).Results:
Yes - Proceed to Test Step 6.
No - Proceed to Test Step 5.Test Step 5. Check the Voltage Supply of the Injection