HARNESS AS-CONSOLE 3987012 - Caterpillar

Table 1
Diagnostic Codes Table
J1939 Code and Description Conditions which Generate this Code System Response
175-15
Engine Oil Temperature 1 : High - least severe (1) The oil temperature has risen above the trip point for the specified delay time. The code is logged.
The ECM may derate the engine.
175-16
Engine Oil Temperature 1 : High - moderate severity (2) Probable Causes
Engine oil level
Engine oil cooler bypass valve
Engine oil cooler core
Engine coolant temperatureRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 2
Troubleshooting Test Steps Values Results
1. Check the Crankcase for a Low Engine Oil Level
A. Check the engine oil level. Too little oil in the engine crankcase can cause the engine components to be starved for lubrication and the engine oil temperature to raise.
B. Ensure that the level indicator is calibrated correctly for the installation.
Oil Level
Result: The oil level is OK and the level indicator is OK.
Proceed to Test Step 2.
Result: The oil level is NOT OK or the level indicator is NOT OK.
Repair: If necessary, add oil to the correct level. Ensure that the correct oil level is maintained in the crankcase.
If the problem is not resolved, proceed to Test Step 2.
2. Engine Oil Cooler Bypass Valve
A. Ensure that the bypass valve is not stuck in the open position. Clean the bore for the valve.
B. Inspect the components of the engine oil cooler bypass valve for damage.
Bypass Valve
Result: The bypass valve is OK.
Proceed to Test Step 3.
Result: The bypass valve is NOT OK.
Repair: Free the valve or replace the valve.
If the problem is not resolved, proceed to Test Step 3.
3. Check the Engine Oil Cooler for Damage and Plugging
Oil Cooler Damaged and/or Plugged
Result: The engine oiler cooler is NOT OK.
Repair: Clean the engine oil cooler core. Perform any necessary repairs.
Result: The engine oil cooler core is OK
Proceed to Test Step 4.
4. Check for a High Engine Coolant Temperature
A. Check for an elevated engine coolant temperature. A high coolant temperature can cause the engine oil temperature to increase out of specifications
Coolant Temperature
Result: The engine coolant temperature is NOT OK.
Repair: Troubleshoot any codes before continuing with this procedure.
Refer to Troubleshooting, "Coolant Temperature Is High" for information related to troubleshooting an elevated coolant temperature.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).