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PULLEY 7B0258 - Caterpillar

7B0258 PULLEY Caterpillar parts PULLEY
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Caterpillar 7B0258 PULLEY

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Illustration 1 g01209718
Brake cooling pump solenoid connections
This diagnostic code is associated with the brake cooling pump solenoid. The FMI 05 means that the ECM has determined that the current for the solenoid is below normal. An open may exist in the circuit for the solenoid. Some possible causes of this diagnostic code are listed below:
The energize 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. System Response:When the CID 1230 FMI 05 diagnostic code is active, the machine response can be:
The differential cooling fan will operate at the minimum speed or will not operate.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 1230 FMI 05 is active before performing this procedure.Test Step 1. CHECK THE SOLENOID
Disconnect the solenoid from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire J817-WH(White)) to contact 2 (wire K927-BU(Blue)).
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Observe the status of the CID 1230 FMI 05. Expected Result:The CID 1230 FMI 05 remains 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NO - The diagnostic is no longer active.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 ECM connector J2 from the ECM.
The jumper wire that was installed in the previous Test Step remains in place.
At the machine harness connector J2 for the ECM, measure the resistance from contact J2-8 (wire J817-WH(White)) to contact J2-3 (wire K927-BU(Blue)). Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 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. A resistance measurement that is much greater than 5 ohms but less than 5000 ohms could indicate that one of the connection points in the circuit is not open but is not a good connection.Repair: The open or possible bad connection is in wire J817-WH(White) or in wire K927-BU(Blue) 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 that are used in the solenoid circuit. Ensure that the contacts are secure. Clean all of the contacts in the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the

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