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LINK A.-TRACK 0002391 - Caterpillar



0002391 LINK A.-TRACK Caterpillar parts LINK
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Alternative (cross code) number:
CA0002391
000-2391
0002391
Caterpillar 0002391 LINK A.-TRACK

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Illustration 1 g01004756
Schematic of the Position Sensor for the Decelerator pedalThis diagnostic code is recorded when the ECM reads the duty cycle or the frequency of the sensor as being out of range.Note: This diagnostic code is usually an intermittent condition. The diagnostic code may be active or the diagnostic code may not be active.The output frequency of the position sensor is approximately 500 hertz. The duty cycle of the signal changes as the position sensor moves. The duty cycle varies from 34% at the low idle position to 62% at the high idle position. The possible causes of this condition are listed:
The signal circuit is shorted to the + 8 volt sensor supply or shorted to ground intermittently.
The signal circuit is open intermittently or the sensor is disconnected.
The sensor may have failed.Note: This procedure can cause new diagnostic codes to be recorded. Ignore these created diagnostic codes. When the procedure is completed, clear the created diagnostic codes.System Response:When this diagnostic code occurs, the action lamp is ON. The diagnostic code will cause the underspeed performance to be affected.Test Step 1. CHECK FOR POWER AT THE SENSOR.
Do not disconnect the harness connector from the sensor.
At the back of the harness connector for the sensor, insert a 7X-1710 Multimeter Probe along the voltage supply wire (contact A).
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact A to frame ground.Expected Result:The voltage is 8 DCV.Results:
OK - The voltage is 8 DCV. Proceed to Test Step 2.
NOT OK - The voltage is NOT 8 DCV. The circuit is open. Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE SIGNAL CIRCUIT OF THE SENSOR.
Turn the key start switch and the disconnect switch to the OFF position.
At the back of the harness connector for the sensor, remove the 7X-1710 Multimeter Probe from contact A and insert the probe along the signal wire (contact C).
At the back of the harness connector for the sensor, insert the 7X-1710 Multimeter Probe along the ground wire (contact B).
Turn the disconnect switch and the key


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