VALVE MECHANISM GP 1W8465 - Caterpillar

this procedure to troubleshoot a low coolant pressure. Also, use this procedure if one of the following event codes is active or logged.
Table 1
J1939 Code and Description CDL Code and Description Comments
N/A E563 (3)
Low Engine Coolant Flow The Electronic Control Module (ECM) detects that the coolant flow through the engine is lower than expected.
N/A 1937-2
Engine Coolant Flow Switch : Erratic, Intermittent, or Incorrect The ECM detects that the coolant flow through the engine is different than expected.
109-1
Engine Coolant Pressure : Low - most severe (3) E2112 (3)
Low Engine Coolant Pressure The engine coolant pressure is lower than expected for an extended period.
The code is logged.
109-17
Engine Coolant Pressure : Low - least severe (1) E2112 (1)
Low Engine Coolant Pressure The engine coolant pressure is lower than expected for an extended period.
The code is logged.
109-18
Engine Coolant Pressure : Low - moderate severity (2) E2112 (2)
Low Engine Coolant Pressure The engine coolant pressure is lower than expected for an extended period.
The code is logged. Probable Causes
Codes
Coolant level
Leaks
Expansion tank (if equipped)
Sensor
Flow switch
Water pump
Heat exchanger
Oil coolerRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: A code is active or logged.
Proceed to Test Step 2.
2. Check the Coolant Level
Note: If the coolant level is too low, air will get into the cooling system. Air in the cooling system will cause a reduction in coolant flow and pressure.
A. Check the cooling system for coolant leaks.
Coolant Level
Result: The coolant level is OK.
Proceed to Test Step 3.
Result: The coolant level is NOT OK.
Repair: Determine the cause of the low coolant level. Refer to Troubleshooting, "Coolant Level Is Low" for additional information.
If the problem is not resolved, proceed to Test Step 3.
3. Check the Cooling System Hose Routing
A. Check the cooling system clamps and hoses to make sure that the clamps and hoses are installed in the proper location and the clamps are tight.
B. Ensure that there are no kinks or tight bends that may cause excessive restriction.
C. Check to make sure that the hoses are routed correctly.
Leaks or Kinks
Result: The coolant clamps and hoses are installed properly.
Proceed to Test Step 4.
Result: The coolant clamps and hoses are not installed properly.
Repair: Repair or replace the damaged cooling system component.
If the problem is not resolved, proceed to Test Step 4.
4. Check the Expansion Tank
A. Check the shunt line for a restriction. A restriction of the shunt line from the expansion tank to the inlet of the jacket water pump will cause a reduction of water pump efficiency.
B. Inspect the expansion tank for a restriction that blocks the port to the shunt line.
Note: The expansion tank may be integrated into the design of the radiator top tank and may not be separate.
Shunt Line
Result: The shunt line is properly installed and there are no restrictions.
For a E2112 or 109 code, proceed to