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TUBE AS 3157336 - Caterpillar

3157336 TUBE AS Caterpillar parts TUBE
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Caterpillar 3157336 TUBE AS

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Illustration 1 g02582457
Connections of the Impeller Clutch Solenoid
This diagnostic code is associated with the Impeller Clutch Solenoid. The FMI 06 means that the ECM has detected that the current for the solenoid circuit is above normal.The following conditions could cause this diagnostic code to be activated:
The energize circuit of the solenoid is shorted to a ground source.
The solenoid has failed.
The ECM has failed. The failure of the ECM is unlikely.System Response:The Rimpull Control is disabled.Note: Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit meet the following requirements: clean, secure, and good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.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.Test Step 1. CHECK THE SOLENOID
Turn the disconnect switch and the key start 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 CID 0678 FMI 06 diagnostic code changes to a CID 0678 FMI 05 diagnostic code when the solenoid is disconnected.Results:
YES - The active CID 0678 FMI 06 diagnostic code changes to a CID 0678 FMI 05 diagnostic code when the solenoid is disconnected. The solenoid circuit in the machine harness is correct.Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" to verify the solenoid failure. Replace the solenoid.STOP
NO - The CID 0678 FMI 06 diagnostic code remains active. Disconnecting the solenoid did not change the status of the active diagnostic code. The solenoid is not causing the problem. 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 start switch and the disconnect switch to the OFF position.
Disconnect the machine harness ECM connectors J1 and J2 from the ECM.
At the machine harness ECM connectors, measure the resistance from the signal contact J1-59 (wire H724-YL(Yellow)) to frame ground. Measure the resistance from the signal contact J1-59 (wire H724-YL(Yellow)) to all the other contacts that are used in J1 and J2 ECM connectors.
At the same time as observing the multimeter resistance measurements, wiggle the machine harness connectors for the ECM and the solenoid. Gently pull on the wires and move the wires all around.Expected Result:Each resistance measurement is always greater than 5000 ohms during the manipulation of the harness and connectors.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - One or more of the resistance measurements are less than 5000 ohms. The resistance measurement is indicating that a short is present in the machine harness. The short is

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