HOSE AS 1255085 - Caterpillar

Illustration 1 g03746482
Schematic of the Front Drum Eccentric Weight Cylinder Position Sensor
This diagnostic code is recorded when the Machine ECM 1 determines that the signal for the sensor has an open circuit. This sensor is a PWM sensor. The signal wire for the sensor connects to connector contact J-C50-10 (wire M401-GY(Grey)) of the ECM.Note: Diagnostic Codes for components of the AAC I/O Controller are relayed to the Machine ECM via the CAN Data Link.The possible causes of this diagnostic code are listed:
A shorted harness
A failed sensor
A short to +Battery
The Machine ECM 1 has failed. Failure of the ECM is unlikely.Note: Ensure that the diagnostic code is active and that the diagnostic code indicator is active.Note: The following procedure can create numerous related diagnostic codes. Reconnect all harnesses. Then, the related diagnostic codes will be shown as being NOT active. Complete the following procedure. Then, clear all of the related diagnostic codes.System Response:A Level 2 warning is generated.Test Step 1. CHECK FOR POWER AT THE SENSOR.
Do not disconnect the harness connector from the sensor.
Turn the key start switch and the disconnect switch to the ON position.
At the harness connector for the sensor, measure the voltage from contact A (wire 163-WH(White)) to contact C (wire 200-BK(Black)). Use the 7X-1710 Multimeter Probes. Expected Result:The voltage is battery voltage.Results:
OK - The voltage is battery voltage. Proceed to Test Step 2.
NOT OK - The voltage is not battery voltage. The circuit is open or grounded. Repair: Replace the machine harness or repair the machine harness.STOPTest Step 2. CHECK FOR PROPER GROUND AT THE SENSOR.Note: Check the “jumper harness” at the sensor for continuity and shorts.
The harness remains connected to the sensor.
Turn the key start switch and the disconnect switch to the OFF position.
At the harness connector for the sensor, measure the resistance from contact C (wire 200-BK(Black)) to frame ground. Use the 7X-1710 Multimeter Probe. Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The ground circuit is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5 ohms. The ground circuit in the harness has failed.Repair: Replace the harness or repair the harness.STOPTest Step 3. CHECK THE WIRING HARNESS