HOSE AS 3686293 - Caterpillar

Illustration 1 g02472596
Schematic of the Position Sensor of the Service Brake Pedal
Illustration 2 g02472477
Schematic of the Position Sensor of the Service Brake Pedal for D6R Series II, D7R Series II and D8R Series II machines
This diagnostic code is recorded when the ECM reads the duty cycle of the sensor as being out of range.The position sensor is a PWM sensor that operates at a frequency of approximately 5 kHz. The sensor has an operating duty cycle of 3.5% to 94%.The possible causes of this condition are listed below:
The signal circuit is shorted to the +battery circuit or shorted to ground intermittently.
The signal circuit is open intermittently or the sensor is disconnected.
The sensor may have failed.
The ECM may have failed. This is unlikely.Note: This diagnostic code is usually an intermittent condition. The diagnostic code may be active or the diagnostic code may not be active.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.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 contact A (wire 140-BU) for the voltage supply.
Turn the key start switch and the disconnect switch to the ON position.
Measure the voltage from contact A (wire 140-BU) to contact B (wire G939-PK).
For D6R Series II, D7R Series II and D8R Series II, measure the voltage from contact A (wire 140-BU) to contact B (wire 202-BK).Expected Result:The voltage is between 9 to 32 VDC.Results:
OK - The voltage is between 9 to 32 VDC. Proceed to Test Step 3.
NOT OK - The voltage is not between 9 to 32 VDC. 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 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 start switch to the ON position.
Monitor the signal of the sensor with the 146-4080 Digital Multimeter .
Without disconnecting the sensor or the hardware that is associated with the sensor from the machine, take the sensor through the full operating range of the sensor.Expected Result:The signal of the sensor responds in the manner that is described at the beginning of this procedure.Results:
OK - The signal of the sensor responds correctly. The sensor is operating correctly. Proceed to Test Step 3.
NOT OK - The signal of the sensor does not respond correctly. The sensor is NOT operating correctly.Repair: Replace the sensor.STOPTest Step 3. CHECK THE SIGNAL CIRCUIT AT THE ECM.
Turn the key start switch and the disconnect switch to the OFF position.
Insert the 7X-1710 Multimeter Probes into the back of