PISTON 3830528 - Caterpillar

the wiring. Proceed to Test Step 3.Test Step 3. Measure the Resistance of the Prelube Pressure Switch at the Prelube Pressure Switch.
Turn the ECS to the OFF/RESET position.
Disconnect the wires from the terminals of the prelube pressure switch.
Measure the resistance between the terminals of the prelube pressure switch. Expected Result:The resistance is greater than 20000 Ohms.Results:
OK - The resistance is greater than 20000 Ohms. There is a problem with the wiring between ECM connector J1/P1 and the switch.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOP
Not OK - The resistance is less than 20000 Ohms. There is a problem with the prelube pressure switch.Repair: Temporarily replace the prelube pressure switch with a new switch. If the problem is no longer present, reinstall the old switch. If the problem returns, replace the switch.STOPTest Step 4. Check the Status of the ECS and the Prelube Pressure Switch on the Caterpillar Electronic Technician (ET).
Connect Cat ET to the service tool connector.
Turn the ECS to the STOP position.
Use Cat ET and view the following parameters: Engine Prelube and Ignition Switch.
Go to the diagnostic test in the diagnostic section on CAT ET. Activate the override for the engine prelube.
View the parameters for the prelube pressure switch and the ignition switch.
Disable the override for the engine prelube. Expected Result:When the ECS is in the STOP position, the engine prelube displays "OFF" and the ignition switch displays "STOP". When the override for the engine prelube is activated, the engine prelube displays "ON" and the ignition switch displays "STOP".Results:
OK - The parameters are correct. Proceed to Test Step 5.
Not OK - The status of the ignition switch does not display "STOP".Repair: Perform the diagnostic functional test Troubleshooting, "Engine Control Switch (ECS)".STOP
Prelube Disabled - The prelube function is disabled. The engine prelube duration is set to zero.Repair: The cycle time of the engine prelube must be greater than zero for the prelube function to work.STOPTest Step 5. Check for Output Voltage from the "PPR1" Relay at the Connector P-C1 to the Prelube Motor.
Turn the ECS to the OFF/RESET position.
Connect one end of the voltmeter to the −Battery terminal.
Connect the other end of the voltmeter on wire G705 on pin X at connector P-C1 of the rigid harness.
Turn the ECS to the STOP