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NUT 0002244 - Caterpillar

0002244 NUT Caterpillar parts NUT
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Caterpillar 0002244 NUT

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Illustration 1 g01004770
Schematic of the Solenoid Valve (Parking Brake)This diagnostic code is recorded when the ECM reads the current of the solenoid as being below normal. There is an open circuit.The possible causes of this diagnostic code are listed:
The circuit of the solenoid is open.
The return circuit of the solenoid is open.
The solenoid has failed.
The ECM has failed. This is unlikely.
The service brake pedal switch has failed.System Response:When this diagnostic code occurs, the action lamp and the action alarm are ON. The diagnostic code will cause the transmission to shift to NEUTRAL until the problem is corrected. Note: Ensure that CID 0681 FMI 05 is on hold and that the diagnostic indicator is illuminated. The nominal coil resistance at room temperature is 8.15 .6 ohms.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 is corrected.Test Step 1. CHECK THE SOLENOID.
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Disconnect the solenoid with the active diagnostic code from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire A958-WH) to contact 2 (wire H803-BU).
Observe the status of the CID 0681 FMI 05.Expected Result:The CID 0681 FMI 05 remains active. The FMI has not changed and the "05" is still active.Results:
YES - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Proceed to Test Step 2.
NO - The diagnostic is no longer active. The solenoid has failed.Repair: The solenoid has failed. Repeat this Test Step "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid. Verify that the new solenoid corrects the problem.STOPTest Step 2. CHECK THE HARNESS FOR AN OPEN.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector(s) from the ECM.
The jumper wire that was installed in the previous test remains in place.
At the machine harness connector, measure the resistance from signal contact J1-68 (wire A958-WH) to contact J1-55 (wire H803-BU).Expected Result:The resistance is 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 wire A958-WH or in wire H803-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 contacts of the harness connectors and clean the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the CID 0681 FMI 05.Expected Result:The CID 0681 FMI 05 is active. Results:
YES - The CID 0681 FMI 05 is active. The diagnostic code has not been corrected. The ECM may have failed.Repair: It is unlikely that the ECM

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