PISTON 4441421 - Caterpillar

Illustration 1 g02077637
Schematic of the Screed Float SolenoidThe Screed Float Solenoid is located behind the LH Machine side panel. The solenoid is part of the bank of nine solenoids.
Illustration 2 g02211494
Machine LH Side Panel Open
Illustration 3 g02211358
Solenoid Bank behind LH side panel
Illustration 4 g02219353
View from below of the Solenoid bank (1) Park Brake Solenoid (Wire 374-PK) (2) Counterbalance Lock Solenoid (Wire X771-YL) (3) Auger Raise Solenoid (Wire 787-WH) (4) Screed Float Solenoid (Wire A905-GN) (5) Screed Raise Solenoid (Wire F742-PU) (6) Counterbalance Solenoid (Wire T841-PK) (7) Counterbalance Standby Solenoid (Wire T840-PU) (8) Auger Lower Solenoid (Wire 781-PK) (9) Propel Mode (Gear) Shift Solenoid (Wire 334-BU)This diagnostic code is associated with the Screed Float Solenoid (4). The FMI 06 means that the LH Operator ECM has detected that the current for the solenoid circuit is above normal. Note: The LH Operator ECM is located under the LH Operator Platform.Conditions that could cause this diagnostic code to be activated are:
The energize circuit of the solenoid is shorted to a ground source.
The solenoid has failed.
The ECM has failed. This situation is unlikely. System Response:When this diagnostic code is active, the following occurs:
Screed lower is disabled.
Counterbalance system will not function.
Operator station fault lamp is active.Note: Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure and in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure. 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.Note: The resistance of the solenoid coil should be 27 1.4 ohms at 20 °C (68.0 °F).Test Step 1. CHECK THE SOLENOID
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Observe the status of the diagnostic code.
Disconnect the machine harness at the solenoid for the Screed Float hydraulic valve. Expected Result:The active CID 2569 FMI 06 diagnostic code changes to a CID 2569 FMI 05 diagnostic code when the solenoid is disconnected.Results:
YES - The active CID 2569 FMI 06 diagnostic code changes to a CID 2569 FMI 05 diagnostic code when the solenoid is disconnected. The solenoid circuit in the machine harness is correct.Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. The resistance of the solenoid coil should be 27 1.4 ohms at 20 °C (68.0 °F). Replace the solenoid.STOP
NO - The CID 2569 FMI 06 diagnostic code remains active. Disconnecting the solenoid did not change the status of the active diagnostic code. The solenoid is not causing the problem. Proceed to Test Step 2.Test Step 2. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUNDThe solenoid remains disconnected from the machine harness.
Turn the key