FILTER GP-FUEL 2066911 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the sensor or if any one of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table
Code and Description Conditions which Generate this Code System Response
175-3 Engine Oil Temperature Sensor voltage above normal The engine's Electronic Control Module (ECM) detects signal voltage that is more than 4.8 VDC for one second.
The ECM has been powered for at least three seconds. The code is logged.
The value of the parameter is set to a default value.
175-4 Engine Oil Temperature Sensor voltage below normal The ECM detects signal voltage that is less than 0.2 VDC for one second.
The ECM has been powered for at least three seconds. System OperationThe sensor signal for the passive sensor is routed from the ECM to terminal 1 of the sensor connector. The sensor return for the passive sensors is routed from the ECM to terminal 2 of the sensor connector.
Illustration 1 g01441755
Typical schematic
Illustration 2 g01441767
P1 ECM connector
(P1-3) Analog sensor return
(P1-26) Engine oil temperature sensor
Illustration 3 g01234146
Location of ECM connectors
Illustration 4 g01163206
Sensor connector
(Terminal 1) Engine oil temperature sensor
(Terminal 2) Analog sensor return Test Step 1. Check for "Active" or "Logged" Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the main disconnect switch to the ON position.
Monitor the diagnostic codes on Cat ET. Check and record any diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
Determine if a diagnostic code has occurred several times. Note: A diagnostic code that is logged several times is an indication of an intermittent problem. Most intermittent problems are the result of a poor connection between a socket and a pin in a connector or of a poor connection between a wire and a terminal.
Determine if the problem is active and related to one of the following diagnostic codes:
-3
-4Expected Result:A diagnostic code is not active.Results:
OK - A diagnostic code is not active.Repair: The problem may be intermittent. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - An active -3 diagnostic code is present. Proceed to Test Step 2.
Not OK - An active -4 diagnostic code is present. Proceed to Test Step 3.Test Step 2. Create a Short at the Sensor Connector
Turn the main disconnect switch to the OFF position.
Disconnect the suspect sensor.
Use a wire jumper in order to create a short between terminal 1 (signal) and terminal 2 (sensor return) at the sensor connector.
Turn the main disconnect switch to the ON position.
Access the "Active Diagnostic Code" screen on Cat ET. Check for an active -4 diagnostic code for the suspect sensor. Expected Result:A -4 diagnostic code is now active for the suspect sensor(s).Results:
OK - A -3 diagnostic code was active before creating the short at the sensor connector. A -4 diagnostic code became active after creating the short at the sensor connector. The wiring between the ECM and the sensor connector is OK.Repair: Temporarily connect a new sensor to the