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OPTION AR 4647116 - Caterpillar



4647116 OPTION AR Caterpillar parts OPTION
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Alternative (cross code) number:
CA4647116
464-7116
4647116
Caterpillar 4647116 OPTION AR

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Illustration 1 g01333731
Schematic for the Operator Gear Ratio Set/Recall SwitchThe Operator Gear Ratio Set/Recall Switch has two inputs to the ECM. The two inputs are normally open and normally closed. During normal operation, one of the inputs is open. The other input is grounded. When a circuit is measured with a voltmeter, an open circuit will measure approximately 13 DCV to ground and a closed circuit will measure approximately 0 DCV to ground. An FMI 03 diagnostic code is recorded when the status of both the inputs are open.The possible causes of this diagnostic code are listed below:
The return circuit (wire J764-BR) is open.
Switch contact "7" signal circuit (wire R981-YL) is permanently open.
Switch contact "6" signal circuit (wire F774-WH) is permanently open.
The switch has failed.
The ECM has failed. This is unlikely. 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 are clean, secure and in 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.
Table 1
Status of the Switch    
MODE    Switch Position    J1-42 (N/O)
F774-WH Circuit    J1-41 (N/C)
R981-YL Circuit    
Released     Up     Open     Closed    
Pressed     Down     Closed     Open    System Response:A level 1 warning will be generated. Functionality is lost. The ECM clears any stored pre-set forward and reverse speeds.Note: Ensure that the diagnostic code CID 2532 - FMI 03 is active before performing this procedure.Test Step 1. CHECK THE GROUND CIRCUIT FOR AN OPEN
Turn the disconnect switch and the key switch to the OFF position.
Disconnect the machine harness connectors from the ECM.
Disconnect the switch from the machine harness.
Measure the resistance between chassis ground and contact 5 (wire J764-BR) at the connector for the switch.Expected Result:The resistance should be less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. Proceed to Test Step 2.
NOT OK - The resistance is greater than 5 ohms.Repair: The return circuit (wire J764-BR) is open in the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE SWITCH
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