Engine Coolant Temperature Sensor
WARNING: This page is about a different car, the 2002 Suzuki XL-7, 2002 Suzuki Vitara, 2002 Suzuki Grand Vitara, 2002 Suzuki Esteem, and 2002 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
Remove Engine Coolant Temperature (ECT) sensor from intake manifold and place in water with a thermometer. Heat water to specified temperature and check resistance. See Fig 1 . Replace sensor if resistance is not within specification.