CYLINDER GP-LIFT 3814585 - Caterpillar

Set the engine control to the OFF/RESET mode. Switch 16 amp circuit breaker (2) to the OFF position. Note: For the following steps, refer to Troubleshooting, "Inspecting Electrical Connectors".
Thoroughly inspect the following components:
J1/P1 connectors
J9/P9 connectors on the terminal box
Wiring and the connections between the terminal box and the device that supplies the 4 to 20 mA signal
Check the torque of the allen head screw for the ECM connector. The proper torque is 6 1 N m (55 9 lb in).
Illustration 3 g01071532
Harness side of the P1 connector
(P1-36) + Signal
(P1-37) - Signal
Illustration 4 g00890197
Harness side of the P9 connector
(P9-K) + Signal
(P9-P) - Signal
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the 4 to 20 mA circuit.
Check the harness and wiring for abrasion and for pinch points between the device that supplies the 4 to 20 mA signal and the ECM. Expected Result:All of the connectors, pins, and sockets are connected properly. The connectors and the wiring do not have corrosion, abrasion, or pinch points.Results:
OK - The components are in good condition with proper connections. If you are troubleshooting a "524-03 Desired Engine Speed Sensor short to +batt" diagnostic code, proceed to Test Step 2. If you are troubleshooting a "524-04 Desired Engine Speed Sensor short to ground" diagnostic code, proceed to Test Step 5.
Not OK - The components are not in good condition and/or at least one connection is improper.Repair: Perform the necessary repairs and/or replace parts, if necessary.STOPTest Step 2. Check for an Open Circuit
Remove the two wires ("+" and "-") for the 4 to 20 mA signal from the device that supplies the 4 to 20 mA signal.
Install a jumper wire between the two wires ("+" and "-") that were removed from the device that supplies the 4 to 20 mA signal.
Disconnect the P1 connector.
Measure the resistance between terminals P1-36 and P1-37. Expected Result:The resistance is less than 5 Ohms.Results:
OK