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RING 0004605 - Caterpillar

0004605 RING Caterpillar parts RING
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Caterpillar 0004605 RING

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The decelerator position sensor provides a pulse width modulated signal that varies with the position of the decelerator. The Electronic Control Module (ECM) translates the signal into a percentage that is displayed as "Decelerator Position". The range for "Decelerator Position" is 0 to 100 percent.
Illustration 1 g01013483
Test Step 1. Inspect Electrical Connectors and Wiring
Place the engine control in the OFF/RESET mode.
Thoroughly inspect J1/P1 ECM connector, J61/P61 machine connector, and J405/P405 decelerator position sensor connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details. Expected Result:All connectors, pins, and sockets are completely inserted and coupled. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the circuit.Verify that the repair eliminates the problem.STOPTest Step 2. Inspect the Decelerator Pedal Assembly
Inspect the decelerator pedal assembly for components that are loose, bent, missing, or worn.
Slowly depress the pedal and release the pedal. Expected Result:The decelerator pedal assembly operates smoothly without excessive drag. The pedal returns to the fully released position without assistance in less than one second.Results:
OK - The decelerator pedal assembly functions properly. Proceed to Test Step 3.
Not OK - Repair: Repair the decelerator pedal assembly, as required.STOPTest Step 3. Check the Status for "Decelerator Position"
Connect the Caterpillar Electronic Technician (ET) to the service tool connector.
Place the engine control in the ON mode.
Observe the status for "Decelerator Position" on Cat ET while you operate the decelerator pedal. Expected Result:The status is approximately 0 percent when the decelerator pedal is released. The status progressively increases to 100 percent when the decelerator pedal is fully depressed.Note: This range can change depending on the adjustment of the decelerator pedal assembly.Results:
OK - The decelerator position sensor is working properly.Repair: Refer to Troubleshooting, "Electrical Connectors - Inspect" if the problem is intermittent.STOP
Not OK - Proceed to Test Step 4.Test Step 4. Check the Supply Voltage at the Sensor
Install a 7X-6370 Adapter Cable (Three-Pin Breakout) at the J405/P405 decelerator position sensor connector.
Place the engine control in the ON mode.
Measure the voltage across terminal A (Digital Sensor +8 VDC) and terminal B (Digital Return) at the J405/P405 breakout. Expected Result:The supply voltage is 8.0 0.5 VDC.Results:

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