Circuit/System Verification

Engine running, observe the scan tool IAT Sensor parameter. The reading should be between -39 to +120°C (-38 to +248°F) depending on the current ambient temperature and the vehicle operating conditions.

IMPORTANT:

Perform this verification procedure only when the ignition has been OFF for 8 hours or more.
The IAT will begin to warm up as soon as the ignition key is turned ON

Ignition ON, observe the scan tool IAT Sensor and ECT Sensor parameters. The readings should be within 15°C (27°F) of each other and also the ambient temperature.