SENSOR GP-POSITION 1683551 - Caterpillar

Illustration 1 g01190695
Typical schematic
Test Step 1. Check for Connector Damage
Turn the engine control to the OFF/RESET mode.
Turn the battery disconnect switch to the OFF position.
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the other connectors. Refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors" for details.
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 ECM connector (allen head screw) for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors" for details.
Check the customer connector (allen head screw) for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors" for details.
Check the harness and the wiring for abrasion and for pinch points. Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiringare free of corrosion, of abrasion and of pinch points.Results:
OK - The connectors and wiring are OK. Proceed to Test Step 2.
Not OK - The connectors and/or wiring need repair.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOPTest Step 2. Attempt to Start the Engine
Connect Cat ET to the service tool connector J60/P60.
Turn the battery disconnect switch to the ON position.
Turn the engine control to the STOP mode.
Observe the "startup mode" parameters on the Cat ET status screen.
Turn the engine control to the RUN or to the AUTO mode. Continue monitoring engine parameters as the engine cranks.
The crank cycle will continue for the time that is equal to the cycle crank time that has been programmed or the crank cycle will continue until the engine speed reaches the crank terminate speed.
Turn the engine control to the OFF/RESET mode.
Turn the battery disconnect switch to the OFF position. Expected Result:The status screen for the "startup mode" parameter displays "CRANK". The engine cranks.Results:
OK - The "startup mode" parameter on the status screen on the Cat ET displays "CRANK".Repair: The engine cranks. The starting system is working properly.STOP
Not OK - Engine Doesn't Crank - The "startup mode" parameter on the status screen on the Cat ET displays "CRANK". The engine will not crank. Proceed to Test Step 3.
Not OK - Status Screen - The "startup mode" parameter on the status screen on the Cat ET does not display "CRANK".Repair: The problem is in the engine control (generator) and/or the associated wiring. Repair the engine control and/or the wiring.STOPTest Step 3. Manually Crank the Engine
Turn the battery disconnect switch to the OFF position. Turn the engine control to the OFF/RESET mode.
Open the power distribution box that is located on the left side of the engine, close to the starter motors.
Connect one probe of a digital voltmeter to the −Battery terminal. Connect the other probe of the digital voltmeter to wire 314-PU(Purple) on terminal 2 of the magnetic switch.
Turn the battery disconnect switch to the ON position.
Turn the engine control to the STOP mode.
Monitor the voltage on the digital voltmeter.
Turn the engine control to the OFF/RESET mode. Expected Result:The voltage measures