RELAY-GLOW PLUG 2434632 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the Electronic Control Module (ECM) and/or if any one of the diagnostic codes in Table 1 is active or easily repeated.Note: Also, use this procedure if the integrity of the configuration parameters or the engine lifetime totals is questionable.
Table 1
Diagnostic Codes Table    
Code and Description     Flash Code     Conditions which Generate this Code     System Response    
252-12 Calibration Module : Failure     52     The flash file is for a different engine family or for a different engine application.     The engine will not start. Clearing this diagnostic code requires factory passwords. The personality module code must be reset to zero.    
253-2 Personality Module : Erratic, Intermittent, or Incorrect     56     The code indicates a customer or a system parameter has not been programmed.     The diagnostic code is displayed but not logged.    
254-12
Error of the Electronic Control Module     53     The ECM has detected a internal fault with the ECM memory, the microprocessor or the power supply.     The CID-FMI may be viewed on display modules or a electronic service tool. The fault is logged in the ECM memory. The ECM will reset. The ECM can not communicate with an electronic service tool.    Test Step 1. Inspect the Electrical Connectors and the Wiring Harness
Remove electrical power from the ECM.
Thoroughly inspect connector P17/J17. Inspect the ECM connector J14/P14. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit.
Check the allen head screw on the ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion and of pinch points. Proceed to Test Step 2.
NOT OK - There is a problem with the connectors and/or the wiring.Repair: Repair the wiring and connectors or replace the wiring or the connectors. Ensure that all of the seals are properly connected. Verify that the repair eliminates the problem.Verify that the repair eliminates the problem.STOPTest Step 2. Check The ECM Personality Module
Turn the engine control switch to the OFF position.
Remove the personality module access cover.
Remove the personality module. Refer to Troubleshooting, "ECM Software - Install" for details.
Inspect the personality module for physical damage or corrosion.
Inspect the personality module socket inside the ECM for physical damage or corrosion.
Reinstall the personality module.Note: Do not use excessive force to insert the personality module. The personality module is keyed and the personality module will only install one way. A click can be felt when the personality module is installed correctly. Make sure that the personality module is completely seated