Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT OUTER AMBIENT TEMPERATURE SENSOR
1. Remove cooler (ambient temp. sensor) thermistor.
2. Measure resistance between terminals 1 and 2 of cooler (ambient temp. sensor) thermistor connector at each temperature.
  Resistance:
  
  at 0 °C (0 °F): 9.097 - 9.701 kΩ
  
  at 25 °C (77 °F): 2.725 - 2.865 kΩ
  
  Fig 1: Locating Ambient Temp Sensor Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  As the temperature increases, the resistance decreases.
  
  Resistance:
  
  Fig 2: Temp - Resistance Graph
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE OUTER AMBIENT TEMPERATURE SENSOR
2. OK: GO to Next step.
CHECK HARNESS AND CONNECTOR
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: CHECK AND REPLACE COMBINATION METER ASSY