GUARD-BELT 3901272 - Caterpillar

Illustration 1 g02763893
Schematic of the Speed Clutch 3 Solenoid circuit
This diagnostic code is associated with the Speed Clutch 3 Solenoid. The FMI 06 diagnostic code means that the Machine ECM has determined that the circuit current for the solenoid is above normal.Conditions that can cause this diagnostic code are listed below:
The energize circuit of the solenoid is shorted to a ground source.
The solenoid has failed.
The Machine ECM has failed. This situation 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. Verify that the CID 1406 FMI 06 diagnostic code is active before performing this procedure.Test Step 1. CHECK THE SOLENOID
Turn the disconnect switch and the key switch to the ON position. 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 FMI 06 diagnostic code changes to an FMI 05 diagnostic code when the solenoid is disconnected.Results:
YES - The active FMI 06 diagnostic code changes to an 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
NO - The FMI 06 diagnostic code remains active. Disconnecting the solenoid did not affect the status of the diagnostic code. 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 switch and the disconnect switch to the OFF position.
Disconnect the machine harness connectors J1 and J2 from the Machine ECM.
At the harness connector J2, measure the resistance from the supply contact J2-7 (wire 902-BR(Brown)) to frame ground. Measure the resistance from the supply contact J2-7 (wire 902-BR(Brown)) to all of the other contacts that are used on the Machine Control ECM. Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The solenoid circuit is not shorted in the machine harness. 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 902-BR(Brown) and the circuit with the low resistance measurement. Repair: Refer to the Electrical System Schematic of the machine. Examine all of the connectors in circuits for points in the machine harness where the circuits could be shorted. For information on testing for short circuits and finding short circuits, refer to Testing and Adjusting, "Wiring Harness (Short Circuit) - Test". Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Inspect the harness connectors. Clean the contacts of the harness connectors. Check the wires for damage to the insulation that can be caused by excessive heat, battery acid, or chafing.
Perform a 45 N (10 lb) pull test