HOSE AS 1994066 - Caterpillar

Illustration 1 g01103382
Schematic of the Torque Converter Output Speed SensorThis diagnostic code is for the torque converter output speed sensor.This diagnostic code is recorded when the ECM reads the signal from the torque converter output speed sensor and the ECM determines that the signal is erratic, intermittent or incorrect. A diagnostic code is recorded when the signal from the output speed sensor of the torque converter is below the dropout value and the engine torque speed is above low idle.Note: The engine must be running.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 110 ohms and 200 ohms. Results:
OK - The resistance measurement is between 110 ohms and 200 ohms. The speed sensor has not failed. Proceed to Test Step 2.
NOT OK - The resistance measurement is not between 110 ohms and 200 ohms.Repair: The speed sensor has failed. Replace the sensor. Verify that the new sensor corrects the problem.STOPTest Step 2. CHECK THE RETURN CIRCUIT.
The machine harness remains disconnected from the sensor.
Turn the key start switch to the OFF position.
At the machine harness connector for the sensor, measure the resistance between contact 1 (E909-WH) and frame ground.Expected Result:The resistance should measure 20 ohms or less.Results:
OK - The resistance measures 20 ohms or less. The return circuit is correct. Proceed to Test Step 3.
NOT OK - The resistance does not measure 20 ohms or less.Repair: The return circuit (E909-WH) in the machine harness has excessive resistance (open). Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE SIGNAL CIRCUIT FOR AN OPEN IN THE MACHINE HARNESS.
At the machine harness connector for the speed sensor, place a jumper between the two contacts.
Disconnect the machine harness connectors J1 and J2 from the ECM.
At the machine harness connectors J1 and J2, measure the resistance from J1-15 (sensor signal) to J1-16 (the return circuit). Expected Result:There should be less than 5.0 ohms resistance. Results:
OK - There is less than 5.0 ohms resistance. The signal circuit in the machine harness is correct. Proceed to Test Step 4.
NOT OK - There is not less than 5.0 ohms resistance.Repair: The signal circuit (E908-BR) is open in the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 4. CHECK THE SIGNAL CIRCUIT FOR A SHORT.
If a jumper was used in a previous step, remove the jumper.
Reconnect the machine harness to the speed sensor.
At the harness connector J1 and harness connector J2, measure the resistance between J1-15 (E908-BR) and all sources of positive voltage and ground.Expected Result:Each resistance should be greater than 5000 ohms. Results:
OK - Each resistance is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 6.
NOT OK - Each resistance is not greater than 5000 ohms.Repair: There is a short in the machine harness. The short