HOUSING 2634909 - Caterpillar

Illustration 1 g01248468
Winch Low speed Lock Solenoid connectionsThis diagnostic code is associated with the winch low speed lock solenoid. The FMI 03 means that the ECM has determined that the voltage of the solenoid circuit is above normal.The possible causes of the diagnostic code are listed:
The solenoid has failed.
The energize circuit of the solenoid is shorted to the +battery circuit.
The ECM has failed. This is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1887 FMI 03 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.Test Step 1. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT TO THE +BATTERY CIRCUITTurn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the solenoid.
Disconnect the machine harness connectors J1 and J2 the ECM.
At the machine harness connector for the ECM, measure the resistance from the contact J1-61 (wire P785-YL) to all contacts that are used in the machine harness connectors for the ECM. Expected Result:Each resistance measurement is greater than 5000 ohms. Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 2.
NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between wire P785-YL and the circuit that has a low resistance measurement. Repair: Refer to the complete machine Electrical System Schematic. Examine all of the connectors that are in the circuit for a possible short. Ensure that the connections are clean, secure and in good condition. Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Inspect the harness connectors and clean the contacts of the harness connectors and check the wires for damage to the insulation that is caused by excessive heat, battery acid, or chafing.
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit.
Reconnect all harness connectors making sure that the connectors are fully seated and the clips for each connector are completely fastened.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Determine if the CID 1887 FMI 03 is active.Expected Result:The CID 1887 FMI 03 is active.Results:
YES - The CID 1887 FMI 03 is active. The problem has not been corrected.Repair: Check the circuit again. Use the Caterpillar Electronic Technician (ET) service tool, if available, in order to perform a "Wiggle Test" on the machine wiring harness. The wiggle test can detect momentary or intermittent shorts or opens in the machine wiring harness.If the cause of the problem is not found, replace the solenoid. After solenoid replacement, verify that the problem is corrected. If the problem still exists, the ECM may be faulty.Prior to replacing an ECM, always contact your dealership's Technical