BASE AS 6I4802 - Caterpillar

Use 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