RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo VIN A (2007)
Thermostat: Testing and Inspection
On-Board Diagnostics
ON-BOARD DIAGNOSTICS
All 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.
The DTC can also be accessed through the scan tool. Refer to the appropriate Powertrain Diagnostic Procedures information for diagnostic information
and operation of the scan tool.
