Circuit/System Verification
- Ignition ON/Vehicle in Service Mode.
- Verify the scan tool ECM Ambient Air Temperature parameter is between -40°C (-40°F) and +88°C (+190°F) and changes with air temperature changes.
- If not between -40°C (-40°F) and +88°C (+190°F) or changes with air temperature changes
Refer to Circuit/System Testing.
- If between -40°C (-40°F) and +88°C (+190°F) and changes with air temperature changes
- If not between -40°C (-40°F) and +88°C (+190°F) or changes with air temperature changes
- All OK.