RM-350 and SM-350 Road Reclaimer/Soil Stabilizers Machine Electronic Control System Caterpillar

Illustration 1	g00611072
Schematic Of The Rotor Clutch Solenoids

This diagnostic code is recorded when the ECM reads the current of the solenoid as below normal (open circuit).

The results of this diagnostic code are:

• A category 2 warning is showing on the Computerized Monitoring System.

• A diagnostic code affecting this solenoid will not allow the rotor brake to disengage.

The possible causes for this diagnostic code are:

• The energize circuit (705-PK) of the solenoid is open.

• The return circuit (840-GN) of the solenoid is open.

• The energize circuit 921-WH of the "1st Gear Solenoid" is open.

• The energize circuit 922-BR of the "2nd Gear Solenoid" is open.

• The energize circuit 923-GY of the "3rd Gear Solenoid" is open.

• Solenoid is faulty.

• ECM is faulty (unlikely).

Service Note: Ensure that the diagnostic code CID 057 FMI F05 is on-hold and that the diagnostic code (fault) present indicator is ON (diagnostic code present). This procedure can cause new diagnostic codes to be recorded. Ignore these created diagnostic codes. When the procedure is completed, clear the created diagnostic codes.

1. Check Solenoid.

   1. Turn the key start switch to the ON position (do not start the engine). Ensure that the diagnostic code CID 057 FMI F05 is on hold with the diagnostic code present indicator ON.

   2. Disconnect the machine harness from the solenoid.

   3. At the machine harness connector for the solenoid, place a jumper from contact 1 to contact 2.

   4. Observe the status of the diagnostic code (fault) present indicator.

      Expected Result: The solenoid is not the cause of the diagnostic code. The diagnostic code (fault) present indicator remains on.

      Results:

      • YES - The diagnostic code remains. Proceed to next step.

      • NO - The circuit is correct. The solenoid is faulty. Repeat this step (Step 1) to verify the solenoid failure. Replace the solenoid. STOP.

2. Check Harness Circuits For Open.

   1. Turn the key start switch to the OFF position.

   2. Disconnect the machine harness connector from the ECM.

   3. At the machine harness connector for the solenoid, place a jumper from contact 1 to contact 2.

   4. At machine harness connector for the ECM, measure the resistance from contact 37 (705-PK ) to contact 39 (return).

      Expected Result: The resistance less than 5.0 ohms.

      Results:

      • YES - The machine harness is correct. Proceed to next step.

      • NO - There is an open circuit in the machine harness. The open is in wire 705-PK, 921-WH, 922-BR, 923-GY or in wire 840-GN of the machine harness. Repair or replace the machine harness. STOP.

3. Check If Diagnostic Code Remains.

   1. Clean the contacts of the harness connectors.

   2. Reconnect all harness connections.

   3. Turn the key start switch to the ON position.

   4. Enter service mode of the ECM and clear all inactive diagnostic codes.

   5. Operate the machine.

   6. Check to see if CID 057 FMI F05 diagnostic code is present.

      Expected Result: The CID 057 FMI F05 diagnostic code is present.

      Results:

      • YES - The diagnostic code has not been corrected. It is unlikely that the ECM is faulty. Perform the previous Steps again. If the cause of the diagnostic code is not found, replace the ECM. See Testing And Adjusting, "Electronic Control Module (ECM) - Replace". STOP.

      • NO - Diagnostic code is NOT present; the diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation. STOP.