GEAR AS 1213225 - Caterpillar

The Electronic Control Module (ECM) detects one of the following improper responses from the fuel injection pump.
An open circuit
A wire shorted high.
A wire shorted low.The ECM will log the diagnostic code. The diagnostic code may be viewed on the electronic service tool.System Response:The engine may shut down while the diagnostic code is active. Also, the engine may not start while the diagnostic code is active. Troubleshooting:Further troubleshooting is required.Test Step 1. Use a multimeter to check between the following connections:
J1:1
P40:5Note: While the engine is cranking and running, the battery voltage at terminal P40:5 should drop to 0 volts.Ensure that the fault has been eliminated.Results:
Check for active diagnostic codes - STOPTest Step 2. Connect a test ECM to the engine in order to determine if the original ECM is causing the problem. Refer to Troubleshooting, "Replacing the ECM".Note: The parameters of the test ECM must match the parameters in the suspect ECM. If the test ECM resolves the fault, reconnect the suspect ECM. Verify that the fault returns. If the fault returns, replace the suspect ECM.Results:
OK - STOP
Not OK - Proceed to Test Step 3.Test Step 3. Contact the Caterpillar Dealer Solution Network before the fuel injection pump is replaced. The warranty for the fuel injection pump will be affected if the pump is replaced without prior consultation.Replace the fuel injection pump. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove" and Disassembly and Assembly, "Fuel Injection Pump - Install".Check that the fault has been eliminated.Results:
OK - STOP