COIL AS 1110569 - Caterpillar

Illustration 1 g00755643
Schematic for the solenoid valve (quick coupler)Test Step 1. CHECK FOR A SHORT IN THE WIRE HARNESS
Turn the key start switch to the OFF position.
Remove the operator control panel on the right side in order to get to the ECM.
Disconnect the wire harness from the ECM.
Measure the resistance from contact 1 (wire 163-WH) to contact 18 (wire 779-WH).Expected Result:The resistance should be approximately 10.5 Ohms.Results:
OK - The resistance is approximately 10.5 Ohms. Proceed to Test Step 3.
NOT OK - The resistance is less than 10 Ohms. Proceed to Test Step 2.Test Step 2. CHECK FOR A SHORTED WINDING IN THE SOLENOID
Disconnect the connector for the solenoid valve (quick coupler).
Measure the resistance of the solenoid coil from contact 1 to contact 2.Expected Result:The resistance should be approximately 10.5 Ohms.Results:
OK - The resistance is approximately 10.5 Ohms.Repair: The circuit is shorted in the wire harness. Locate the shorted wires. Repair the wire harness or replace the wire harness. Stop.
NOT OK - The resistance is less than 10 Ohms.Repair: The solenoid coil has failed. Replace the coil. Stop.Test Step 3. CHECK FOR A SHORT TO GROUND IN THE WIRE HARNESS
Measure the resistance from contact 18 (wire 779-WH) to contact 3 or the machine frame.Expected Result:The resistance should be greater than 5000 Ohms.Results:
OK - The resistance is greater than 5000 Ohms.Repair: The ECM is very unlikely to have failed. Reconnect all connections and visually inspect the wire harness. Verify that the diagnostic code still exists. If the diagnostic code still exists perform this Test Step again.Replace the ECM, if the cause of the diagnostic code was not found after the second attempt. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace". Stop.
NOT OK - The resistance is less than 5000 Ohms. Proceed to Test Step 4.Test Step 4. CHECK FOR A SHORT TO GROUND IN THE SOLENOID
Disconnect the connector for the solenoid valve (quick coupler).
Measure the resistance from each of the wires of the solenoid coil (contact 1 and contact 2) to the machine frame.Expected Result:The resistances should be greater than 5000 Ohms.Results:
OK - The resistances are greater than 5000 Ohms.Repair: The circuit is shorted in the wire harness. Locate the shorted wires. Repair the wire harness or replace the wire harness. Stop.
NOT OK - The resistance is less than 5000 Ohms on one of the readings.Repair: The solenoid coil has failed. Replace the coil. Stop.