Durango 2WD V8-5.2L VIN Y (1999)
Thermostat: Testing and Inspection
ON-BOARD DIAGNOSTICS
All gasoline powered models are equipped with On-Board Diagnostics for certain cooling system components. Refer to On-Board Diagnostics (OBD) in
Powertrain Management for additional information. 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. Refer to the Cooling System Diagnosis and Testing. For other DTC numbers, refer to On-Board Diagnostics
in Powertrain Management.
The DTC can also be accessed through the DRB scan tool. Refer to Powertrain Management for diagnostic information and operation of the DRB scan
tool.
