Inspection Procedure

INSPECT OUTER AMBIENT TEMPERATURE SENSOR

Fig 1: Identifying Outer Ambient Temperature Sensor
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 k/ohms
  
  at 25 °C (77 °F) : 2.725 - 2.865 k/ohms
  
  HINT:
  
  As the temperature increases, the resistance decreases.
  
  Fig 2: Temperature And Resistance Graph
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPLACE OUTER AMBIENT TEMPERATURE SENSOR
  
  OK: Go to next step
CHECK HARNESS AND CONNECTOR
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: CHECK AND REPLACE COMBINATION METER ASSY