4739973 HANDRAIL AS Caterpillar parts
Rating:
Alternative (cross code) number:
CA4739973
473-9973
4739973
CA4739973
473-9973
4739973
Weight: 25 pounds 11 kg.
Caterpillar parts catalog:
Information:
Illustration 1 g02422680
Engine speed sensorThis diagnostic code is for the engine speed sensor.This diagnostic code is recorded when the ECM reads the signal from the engine speed sensor and the ECM determines that the signal is erratic, intermittent or incorrect. This is determined when the ECM compares the signal from the engine speed sensor to the signal from the torque converter output speed sensor. A diagnostic code is recorded when the signal from the engine speed sensor is below the dropout value and the engine speed is above low idle.Note: The machine must be moving in order for the ECM to display this diagnostic code as being present. Test Step 1. CHECK THE RESISTANCE OF THE SENSOR.
Turn the key start switch to the OFF position.
Disconnect the machine harness from the speed sensor.
Measure the resistance between the two contacts of the connector for the speed sensor. Expected Result:The resistance measurement should be between 900 ohms and 1300 ohms. Results:
OK - The resistance measurement is between 900 ohms and 1300 ohms. The speed sensor has not failed. Proceed
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