C18 Generator Set Engines Caterpillar

Use this procedure in order to troubleshoot high oil temperature or use this procedure if one of the following event codes is active. Refer to Troubleshooting, "Event Codes" for information about event codes. You must access the engine monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".

Table 1

Event Code
Code and Description	Conditions which Generate this Code	System Response
E197(1) High Engine Oil Temperature	The engine oil temperature has exceeded the trip point and the delay time has expired.	The code is logged.
E197(2) High Engine Oil Temperature		The code is logged. Engine power is derated.
E197(3) High Engine Oil Temperature		The code is logged. The engine is shutdown.

If the engine is shut down due to a high engine oil temperature, the power to the engine's Electronic Control Module (ECM) must be cycled in order to restart the engine.

Probable Causes

• Engine oil level

• Engine oil cooler bypass valve

• Engine oil cooler core

• Engine coolant temperature

Recommended Actions

Engine Oil Level

Check the oil level. Add oil, as needed.

Engine Oil Cooler Bypass Valve

Inspect the components of the engine oil cooler bypass valve for damage. Clean the engine oil cooler bypass valve and clean the bore for the valve. Ensure that the bypass valve is not stuck in the open position. Replace the components of the bypass valve, if necessary. Refer to Systems Operation/Testing and Adjusting.

Engine Oil Cooler Core

Check the engine oil cooler core for damage and for plugging. Clean the engine oil cooler core or replace the engine oil cooler core, if necessary.

Engine Coolant Temperature

If a high coolant temperature condition is also occurring, refer to the symptom Troubleshooting, "Coolant Temperature Is High".