Table 10
Diagnostic Trouble Codes for High Coolant Temperature
J1939 Code
Description
Notes
110-15 Engine Coolant Temperature : High - least
severe (1)
The Electronic Control Module (ECM) detects that the coolant temperature
is greater than 110° C (230° F) for at least 0.5 seconds. The code will be
reset if the coolant temperature is less than 110° C (230° F) for at least
0.5 seconds.
If equipped, the warning lamp will come on. The ECM will log the diagnos-
tic code.
110-16 Engine Coolant Temperature : High - moder-
ate severity (2)
The Electronic Control Module (ECM detects that the coolant temperature
is greater than 112° C (233.6° F) for at least 0.5 seconds. The code will be
reset if the coolant temperature is less than 110° C (230° F) for at least
0.5 seconds.
If equipped, the warning lamp will flash. The ECM will log the diagnostic
code.
Probable Causes
• Diagnostic codes
• Coolant level
• Coolant temperature sensor
• Radiator and hoses
• Radiator cap and pressure relief valve
• Water temperature regulator
• Engine cooling fan
• Quality of coolant
• Coolant pump
• Cylinder head gasket
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
UENR0612 39
Symptom Troubleshooting
This document has been printed from SPI2. NOT FOR RESALE
To Next Page
