Aspen 2WD V8-4.7L (2007)
Thermostat: Testing and Inspection
THERMOSTAT
ON-BOARD DIAGNOSTICS
All gasoline powered models are equipped with On-Board Diagnostics for certain cooling system components. Refer to On-Board Diagnostics (OBD).
If the powertrain control module (PCM) detects low engine coolant temperature, it will record a Diagnostic Trouble Code (DTC) in the PCM memory.
Do not change a thermostat for lack of heat as indicated by the instrument panel gauge or by poor heater performance unless a DTC is present. See:
Testing and Inspection/On-Board Diagnostics (OBD)
The DTC can also be accessed through the DRB scan tool.
