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CHASSIS AR 3904345 - Caterpillar

3904345 CHASSIS AR Caterpillar parts 308E CR CHASSIS
Alternative (cross code) number:
Caterpillar 3904345 CHASSIS AR

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Compatible equipment models: 3904345:

MINI HYD EXCAVATOR  308E CR   Caterpillar
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Illustration 1 g02761299
Schematic of the "Retarder Lever" position sensor
This diagnostic code is associated with the "Retarder Lever" position sensor. The FMI 08 diagnostic code means the Brake ECM has determined that the signal frequency or pulse width is not within the expected range. The Retarder Lever position sensors are PWM sensors. A fully rearward lever position is represented by a 10% duty cycle. A fully forward lever position is represented by a 90% duty cycle. The ECM measures the duty cycle of the signal. The possible causes of this diagnostic code are listed below:
The sensor has failed.
Intermittent connections or poor connections
Mechanical devices are loose.
The Brake ECM has failed. This situation is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1227 FMI 08 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure. 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 at contact 1 (108-RD(Red)).
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308E CR Mini Hydraulic Excavator HAM00001-UP (MACHINE) POWERED BY C3.3B Engine

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