CAMSHAFT 3054758 - Caterpillar

Table 1
Diagnostic Codes Table    
J1939 Code and Description    Conditions which Generate this Code    System Response    
444-3
Battery Potential / Power Input 2 : Voltage Above Normal     The battery supply voltage is greater than 32 VDC on 24 VDC systems for 0.5 seconds, or the battery supply voltage is greater than 16 VDC on 12 VDC systems for 0.5 seconds.
The engine ECM has been powered for 3 seconds.
The engine has been running for at least 30 seconds.     The code is logged.    
444-4
Battery Potential / Power Input 2 : Voltage Below Normal     The battery supply voltage is less than 18 VDC on 24 VDC systems for 0.5 seconds or the battery supply voltage is less than 9 VDC on 12 VDC systems for 0.5 second.
The engine ECM has been powered for 3 seconds.
The engine is running for at least 3 seconds.    
444-2
Battery Potential / Power Input 2: Erratic, Intermittent, or Incorrect     The battery voltage falls below 6 VDC and the voltage returns above 9 VDC for three voltage readings in the last 7 seconds.
The engine is running.    The +Battery voltage to the Electronic Control Module is controlled via a relay. The emergency stop switch controls this relay. The emergency stop switch is located on the panel for the Electronic Modular Control Panel (EMCP). When the switch is in the engine run position, the relay is energized. The energized relay provides power to the ECM. The following four terminals at the J1 ECM connector are powered simultaneously:
P1-48 +Battery
P1-52 +Battery
P1-53 +Battery
P1-70 Keyswitch When the ECM detects battery voltage at P1-70 keyswitch, the ECM will power up. When battery voltage is lost from this input, the ECM will power down.The −Battery is supplied to the ECM through a battery disconnect switch that is used to remove the battery power manually from all electrical components.Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove electrical power from the engine ECM.
Thoroughly inspect connectors (1) and (2). Inspect all of the connectors that are in the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 1 g01341802
Terminal locations at the P1 ECM connectors for the electrical power supply circuit (P1-48) +Battery (P1-52) +Battery (P1-53) +Battery (P1-61) −Battery (P1-63) −Battery (P1-65) −Battery (P1-70) Keyswitch
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All connectors, pins, and sockets are inserted and coupled. The harness and wiring are free of corrosion, of abrasion, and of pinch points. All connections are tight and free of corrosion.Results:
OK - The harness and wiring appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the