Toyota
Dodge Durango
 Service Manual
Cooling System » Diagnosis and testing
Thermostat-gas engines

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 the Diagnosis section of this group 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 Diagnosis section of this group for other probable causes. For other DTC numbers, refer to On-Board Diagnostics in the General Diagnosis section of Group 25, Emission Systems.

The DTC can also be accessed through the DRB scan tool. Refer to the appropriate Powertrain Diagnostic Procedures manual for diagnostic information and operation of the DRB scan tool.

    More about «Diagnosis and testing»:

    On-board diagnostics (obd)

    Preliminary checks

    Electric cooling fan

    Radiator coolant flow check

    Cooling system-testing for leaks

    Viscous fan drive

    Accessory drive belt diagnosis

    Thermostat-gas engines

    Radiator cap-to-filler neck seal-pressure relief check

    Radiator cap-pressure testing

    Coolant-low level aeration

    Cooling system-deaeration

    Dodge Durango Service Manual / Cooling System / Diagnosis and testing / Thermostat-gas engines

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