P-521 Sensor Supply Voltage
Usage:
System Operation
The ECM converts the battery voltage into 5 volt and 8 volt sensor supply voltages. These supply voltages are used to supply power and reference voltages to the following sensors: rack position, engine speed, coolant temperature, coolant level, boost pressure, engine oil pressure, transmission oil pressure and transmission oil temperature.
NOTE: A short anywhere on the 5 volt sensor supply circuit, or 8 volt sensor supply will cause loss of sensor output.
NOTE: The 5 volt and 8 volt sensor supply voltages must only be used with the required sensors needed for the 3408/3412 control system. Do not connect any other sensors to the 5 or 8 volt supply voltages.
Schematic
Diagnostic Codes
Functional Test
Caterpillar Information System:
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-520 ECM/Personality Module
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-510 High Coolant Temperature Warning
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-509 Low Coolant Level Warning
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-508 Low Boost Pressure Warning
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-507 Transmission Oil Pressure/Temperature Warning
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-506 ECM Diagnostic Lamp
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-505 Low Engine Oil Pressure Warning
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-504 Trolling Mode
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-503 Synchronize Circuit
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-502 Throttle Position Sensor
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-501 Electrical Power Supply To ECM
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-500 Inspecting Electrical Connectors
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-522 Main Engine Speed Sensor/Adjustment
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-523 Backup Engine Speed Sensor
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-524 Engine Shutdown Switch
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-525 Shutoff Solenoid
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-526 Coolant Level Sensor
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-527 Coolant Temperature Sensor
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-528 Boost Pressure Sensor/Calibration
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-529 Engine Oil Pressure Sensor
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-530 Transmission Oil Pressure Sensor
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-531 Transmission Oil Temperature Sensor
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-540 Dynamic Rack Controls
3408 & 3412 HIGH PERFORMANCE MARINE ENGINES P-541 - Rack Position Sensor/Calibration