ARM 6B7142 - Caterpillar

Illustration 1 g01272020
Connections of the auxiliary valve 7 port A solenoid. This diagnostic code is associated with the auxiliary valve 7 port A solenoid (attachment). The solenoid is an ON/OFF type of solenoid. The FMI 06 means that the Implement ECM has determined that the current of the solenoid circuit is above normal.The following conditions could cause this diagnostic code to be activated:
The energize circuit of the solenoid is shorted to ground.
The solenoid has failed.
The ECM has failed. This is unlikely. 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. Inspect the connections for the following:
Connections are clean.
Connections are secure.
Connections are 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.The resistance of the solenoid coil should be 8.7 0.4 ohms at 25 °C (77 °F).Note: The following test procedure may create other diagnostic codes. Clear these created diagnostic codes when the original diagnostic code has been corrected.Test Step 1. CHECK THE SOLENOID
Turn the disconnect switch to the ON position.
Turn the key start switch to the ON position.Note: Do not start the engine.
Observe the status of the diagnostic code.
Disconnect the solenoid with the active diagnostic code from the machine harness. Expected Result:The active CID 2224 FMI 06 diagnostic code changes to a CID 2224 FMI 05 diagnostic code when the solenoid is disconnected.Results:
OK - The active CID 2224 FMI 06 diagnostic code changes to a CID 2224 FMI 05 diagnostic code when the solenoid is disconnected. The circuit is correct.Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid.STOP
NOT OK - The CID 2224 FMI 06 remains active when the solenoid is disconnected. 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 GROUND
Turn the disconnect switch to the OFF position.
Turn the key start switch to the OFF position.
The solenoid remains disconnected from the machine harness.
Disconnect the machine harness connectors J1 and J2 from the Implement ECM.
At the machine harness of the ECM connectors, perform the following:
Measure the resistance from the contact J2-3 (wire U770-WH) and frame ground.
Measure the resistance from the contact J2-3 (wire U770-WH) and all of the other J1 and J2 contacts that are used in the connectors of the Implement ECM.Expected Result:Each resistance is greater than 5000 ohms.Results:
OK - Each resistance is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - One or more of the resistance measurements is less than 5000 ohms. There is a short in the machine harness. The short is between wire U770-WH and the circuit with the low resistance.Repair: Repair the machine harness or replace the machine harness. STOPTest Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Perform the following:
Visually inspect