Celica L4-1.8L (2ZZ-GE) (2005)
Temperature Sensor (Gauge): Testing and Inspection
INSPECT ENGINE COOLANT TEMPERATURE SENDER GAUGE RESISTANCE
Connect the wire harness as shown in the illustration, and ad- just the ammeter pointer to indicate "0" using the slide rheostat, then read the rheostat
indication.
If resistance value is not as specified, replace the engine coolant temperature sender gauge.
If resistance value is as specified, replace the combination meter.