Inspection Procedure

INSPECT OUTER AMBIENT TEMPERATURE SENSOR

Fig 1: Identifying Outer Ambient Temperature Sensor Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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
  
  NOTE: As the temperature increases, the resistance decreases.
  
  Resistance:
  
  Fig 2: Outer Ambient Temperature Sensor Temperature & 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