STOPPER 4504814 - Caterpillar

connector.
Restore the electrical power to the engine. Set the engine control to the STOP position.
Observe the "Active Diagnostic" screen on Cat ET. Allow a minimum of thirty seconds for any codes to activate. Look for these codes:
41-3 8 Volt DC Supply : Voltage Above Normal
41-4 8 Volt DC Supply : Voltage Below NormalExpected Result:There are no active diagnostic codes for the 8 volt power supply.Results:
OK - There are no active diagnostic codes for the 8 volt power supply. The power supply circuit appears to be OK. There may be a problem with the circuit for the signal wire. Proceed to Test Step 3.
Not OK - There is an active diagnostic code for the 8 volt power supply.Repair: There is a problem with the circuit for the sensor supply. Troubleshoot the problem with the sensor supply before proceeding. Refer to Troubleshooting, "Sensor Supply - Test" for information that is related to troubleshooting the circuit for the 8 volt sensor supply.STOPTest Step 3. Check for Active Diagnostic Codes for the PWM Sensors
Check the "Active Diagnostic" screen on Cat ET. Determine if any diagnostic codes are active: Expected Result:No codes for a PWM sensor are active.Results:
OK - None of the above codes are active.Repair: If any of the above codes are logged and the engine is not running properly, refer to Troubleshooting, "Symptom Troubleshooting" and perform the test that best describes the problem with the engine.If the engine is running properly at this time, there may be an intermittent problem in the harness or with a connection that is causing the codes to be logged. Refer to Troubleshooting, "Electrical Connectors - Inspect" for information that relates to troubleshooting intermittent electrical problems.STOP
Not OK - At least one of the above diagnostic codes is active. There is a problem with the circuit for one of the PWM sensors. Proceed to Test Step 4.Test Step 4. Check for a Supply Voltage at the Harness Connector for the Signal Converter
Turn the engine control to the OFF/RESET position.
Disconnect the harness connector that is between the signal converter and the ECM for the suspect sensor.
Turn the engine control to the STOP position.
On the harness side of the connector for the signal converter, measure the voltage between terminals A and B. Expected Result:The supply voltage at the harness connector is between 7.6 VDC and 8.4 VDC.Results:
OK - The voltage is between 7.6 VDC and 8.4 VDC. The voltage is within the specification. The correct voltage is present at the connector for the signal converter. Connect the harness connector for the signal converter. Proceed to Test Step 5.
Not OK - The voltage is not between 7.6 VDC and 8.4 VDC.Repair: The voltage is not within the specification. The correct voltage is not present at the connector for the signal converter. The correct voltage must be present at the connector in order to continue this procedure. Refer to Troubleshooting, "Sensor Supply - Test" for information that is related to troubleshooting the sensor supply circuit.STOPTest Step 5. Check the Output Voltage