3408 & 3412 HIGH PERFORMANCE MARINE ENGINES Caterpillar

The tests in this section are designed to establish whether a component and related parts are working properly, and if not, to pinpoint the faulty part.

They may be used for basic health checks, to determine if problems exist, or as a guide to check for intermittent problems.

NOTE: Whenever troubleshooting any problem, be sure to check the service history records of the vessel in order to prevent unnecessary parts swapping.

P-500: Inspecting Electrical Connectors

Vessel Circuits Tests

P-501: Electrical Power Supply To ECM

P-502: Throttle Position Sensor

P-503: Synchronize Switch

P-504: Trolling Mode

P-505: Low Engine Oil Pressure Lamp

P-506: ECM Diagnostic Lamp

P-507: Transmission Oil Pressure/Temperature Lamp

P-508: Low Boost Pressure Lamp

P-509: Low Coolant Level Lamp

P-510: High Coolant Temperature Lamp

Engine Circuits Tests

P-520: ECM/Personality Module

P-521: Sensor Supply Voltage

P-522: Main Engine Speed Signal

P-523: Backup Engine Speed Signal

P-524: Engine Shutdown Switch

P-525: Shutoff Solenoid

P-526: Coolant Level Sensor

P-527: Coolant Temperature Sensor

P-528: Boost Pressure Sensor

P-529: Engine Oil Pressure Sensor

P-530: Transmission Oil Temperature Sensor

P-531: Transmission Oil Pressure Sensor

Rack Controls Tests

P-540: Dynamic Rack Controls

P-541: Rack Position Sensor

P-542: Rack Solenoid (BTM)

Overspeed Protection System

P-550: ESS Replacement

P-551: ESS Crank Terminate Test

P-552: ESS and Relay Test

P-553: ESS Overspeed Test

P-554: ESS Overspeed Calibration

P-555: ESS Crank Terminate Calibration