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Circuit/System Verification

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. If DTC P0480, P0481, P0691, P0692, P0693, or P0694 are set, diagnose those DTCs first.
  2. Observe the engine coolant level. The engine coolant level should be within the operating range.
  3. Ensure that the vehicle has the correct engine coolant with correct concentration and is not old, contaminated, or contains additives.
  4. Inspect the cooling system for the following:
    • Leaks
    • Kinked or pinched hoses, especially at the radiator
    • Loose, missing, or damaged radiator air seals or deflectors
    • Air flow obstructions or bent fins at the radiator or the A/C condenser-Refer to Symptoms - Engine Cooling .
    5. IMPORTANT: A small delay occurs before the ECM changes the cooling fan speed.
  5. Command the cooling fans ON and OFF, low and high speed. The engine cooling fans should turn ON and OFF with each command.
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