GEAR (RING-68 TEETH) 5V8973 - Caterpillar

The tests in this section are designed to establish whether a component and related parts are operating properly, and if not, to pinpoint the faulty component.The tests may be used for basic health checks, to determine if problems exist, or as a guide to check for intermittent problems. Whenever troubleshooting any problem, be sure to check the service history records of the engine in order to prevent unnecessary parts replacement.Circuit Tests
P-500: Inspecting Electrical ConnectorsP-501: Electrical Power SupplyP-502: Throttle (PWM) ModuleP-504: PTO ModeP-505: Alarm Lamp Circuit TestsEngine Circuit Tests
P-520: ECM/Personality ModuleP-521: Sensor Supply VoltageP-522: Engine Speed (RPM) SensorsP-523: Engine Shutdown SwitchP-524: Fuel Shutoff SolenoidP-525: Coolant Level SensorP-526: Coolant Temperature SensorP-527: Inlet Manifold (Boost) Pressure SensorP-528: Engine Oil Pressure SensorP-529: Atmospheric Pressure SensorP-534: Air Shutoff SolenoidRack Control Tests
P-530: Dynamic Rack ControlsP-531: Rack Position Sensor/CalibrationP-532: Rack Solenoid (BTM)P-500: INSPECTING ELECTRICAL CONNECTORS
Many of the Operational Procedures and Diagnostic Code Procedures will direct you to inspect/check a specific wire harness electrical connector. Use the following steps to determine if the connector is the cause of the problem. If a problem is found in the electrical connector, repair the connector and continue the test procedure.1. Check Connector Lock Ring Or Allen Screw. Ensure that the connector is properly locked and that the lock ring or allen screw is properly locking the connector together.2. Perform 45 N (10 lb) Pull Test On Each Pin/Wire. Each pin, socket and wire should easily withstand 45 N (10 lb) of pull, and remain in the connector body. This test checks whether the wire was properly crimped in the pin or socket, and whether the pin or socket was properly inserted into the connector. Repair as needed. Pins should ALWAYS be crimped onto the wires, NEVER soldered.3. Visually Inspect Connectors. Verify that pins and sockets are not corroded or damaged. Verify proper alignment and location of pins or sockets in the connector.4. Visually Inspect Wiring. Look for worn insulation or abrasion to wires. Check for pinched or damaged harnesses.5. Check Individual Pins And Sockets. This is especially important for intermittent problems. Use a new pin and insert the pin into each socket one at a time to check for a good grip on the pin by the socket. Repeat for each pin on the mating side of the connector, using a new socket for the test. P-501: ELECTRICAL POWER SUPPLY
System Operation
Schematic Diagnostic Codes
Functional Test
P-502: THROTTLE (PWM) MODULE
System Operation
Schematic Diagnostic Codes
Functional Test
Calibration/Adjustment
P-504: PTO Mode
System Operation
Schematic Functional Test
P-505: Alarm Lamp Circuit Tests
System Operation
Schematic Functional Test
P-520: ECM/Personality Module
System Operation
Install the Personality Module into the ECM making sure it seats properly into the Personality Module socket. Do not use excessive force to push the Personality Module into the socket. The socket is engine control switch (ECS) to accept the Personality Module in one position only. A "click" can be felt when the Personality Module is pushed in correctly. Install the Personality Module access cover back onto the ECM. Ensure the O-ring seal is seated properly. Improper O-ring placement could result in moisture damage