ARRANGEMENT--DOUBLE VALVE 8S0460 - Caterpillar

Which Generate This Code:The drive shaft rpm is detected by a frequency sensor. The speed signal is at contact 5 of the control connector. No signal input to the control generates a fault indication.Test Step 1. CHECK THE SENSOR
Turn the key start switch to the OFF position.
Remove the sensor and check for foreign material on the sensor tip.
Install the speed sensor and adjust the speed sensor.
Operate the engine.
Check the control for an active fault.Results:
NO - Adjustment of the speed sensor or cleaning the speed sensor corrected the fault.Repair: Clear the fault. Stop.
YES - Proceed to test step 2.Test Step 2. CHECK THE SENSOR RESISTANCE
Turn the key start switch to the OFF position.
Disconnect the machine harness from the sensor.
At the sensor connector, measure the resistance between the two contacts.Results:
NO - The resistance is not between 600 and 1600 ohms. The sensor is faulty.Repair: Replace the sensor. Adjust the sensor properly after installation. Clear the fault. Stop.
YES - The resistance is between 600 and 1600 ohms. The speed sensor resistance is correct. Proceed to step 3.Test Step 3. CHECK THE HARNESS
Connect the sensor to the machine harness.
Disconnect the control from the machine harness.
On the machine harness, measure the resistance between contact 2 (ground) and contact 5.Expected Result:The resistance should be between 600 and 1600 ohms.Results:
YES - The harness resistance is correct.Repair: Perform the previous steps. If the cause of the fault is not found, replace the control. Stop.
NO - The machine harness is shorted or open.Repair: Repair the harness or replace the harness. Clear the fault. Stop.