Grand Cherokee 2WD Limited V8-4.7L (2002)
Thermostat: Testing and Inspection
DIAGNOSIS AND TESTING-THERMOSTAT-ON-BOARD DIAGNOSTICS
All models are equipped with On-Board Diagnostics for certain cooling system components. If the powertrain control module (PCM) detects low
engine coolant temperature, it will record a Diagnostic Trouble Code (DTC).
The DTC can also be accessed through the DRB scan tool.
