PARTS AR-MISCELLANEOUS 2631994 - Caterpillar

Illustration 1 g02643524
Connections of the blade angle left solenoid
Illustration 2 g01894953
Location of the blade angle left solenoid This sensor is connected to the Implement ECM. The Implement ECM sends the diagnostic information to the Machine ECM via the CAN data link. This diagnostic code is associated with the return circuit for the Blade Angle Left Solenoid. The FMI 04 means that the ECM has determined that an open or a short to ground in the return circuit exists.The possible causes are listed:
The return circuit of the solenoid is shorted to ground.
The energize circuit of the solenoid is open.
The return circuit of the solenoid is open.
The solenoid has failed.
The Implement ECM has failed. An ECM failure 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. Ensure that the diagnostic code of CID 3195 FMI 04 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.Test Step 1. CHECK THE RETURN CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUND.
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the solenoid from the machine harness.
Disconnect the machine harness at the Implement ECM.
At the harness connector for the Implement ECM, measure the resistance from the signal contact 43 (wire K927-BU) to all contacts that are used in the machine harness connector.Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
YES - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 2.
NO - Each resistance measurement is NOT greater than 5000 ohms. There is a short in the machine harness between signal contact 42 (wire K789-YL) and the circuit with the low resistance measurement.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE HARNESS FOR AN OPEN.
The key start switch and the disconnect switch remain in the OFF position.
The machine harness remains disconnected from the Implement ECM.
The solenoid remains disconnected from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire K789-YL) to contact 2 (wire K927-BU).
At the machine harness connector for the Implement ECM, measure the resistance from signal contact 42 (wire K789-YL) to return contact 43 (wire K927-BU). Expected Result:The resistance should be less than 5.0 ohms.Results:
OK - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5000 ohms. The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in the signal wire (K789-YL) or the return wire (K927-BU) of the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the harness connectors. Clean the contacts of the harness connectors and check the wires for damage to the insulation that is caused by excessive heat, corrosion, or chafing.
Perform a 45 N