BARREL AS 4760297 - Caterpillar

Illustration 6 g01414564
Terminal locations at the P1 ECM connector that are associated with the speed control circuit
(P1-36) Desired speed (4-20 mA)
(P1-37) Return
Illustration 7 g01727553
Terminal locations at the control harness connector that are associated with the speed control circuit
(Terminal C) Desired speed (4-20 mA)
(Terminal P) Return
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Terminal locations at the engine interface connectors that are associated with the speed control circuit
(Terminal 10) Desired speed (4-20 mA)
(Terminal 12) Return
Perform a 45 N (10 lb) pull test on each of the wires in the circuit for the speed control.
Check the torque of the allen head screws for each of the ECM connectors and of the customer connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points from the ECM junction box to the remote panel.Expected Result:All 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. Proceed to Test Step 2.
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 Active Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".
Restore the electrical power to the engine. Turn the engine control to the STOP position.
While you adjust the speed control from the minimum speed to the maximum speed, monitor the active and logged diagnostic codes. Wait at least 30 seconds in order for diagnostic codes to become active. Look for the following active diagnostic codes:
524-3 Desired Engine Speed Sensor : Voltage Above Normal
524-4 Desired Engine Speed Sensor : Voltage Below Normal
Set the engine control to the OFF/RESET position. Remove the electrical power from the engine.Expected Result:None of the above diagnostic codes became active during the test.Results:
OK - No diagnostic codes were activated.Repair: The output for the speed control appears to be OK. The initial diagnostic code may have been caused by a poor electrical connection. If an intermittent electrical problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect", for information that is related to troubleshooting intermittent electrical problems.STOP
Active 524-3 Code - A 524-3 diagnostic code became active while you adjusted the speed control. The ECM has detected an excessive amperage in the circuit for the speed control. Proceed to Test Step 5.
Active 524-4 Code - A 524-4 diagnostic code became active while you adjusted the speed control. The ECM has detected a low amperage in the circuit for the speed control. Proceed to Test Step 3.Test Step 3. Check the Wiring for an Open Circuit
Ensure that the engine control is in the OFF/RESET position. Ensure that the electrical power is removed from the engine and the speed control device.
Remove the wires for the desired speed