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Check Outside Temperature Indicator

DIAGNOSTIC PROCEDURE CHART

Step Check Yes No
1 CHECK POWER SUPPLY FOR AMBIENT SENSOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from ambient sensor.
  3. Turn the ignition switch to ON.
  4. Measure the voltage between ambient temperature sensor harness connector terminal and chassis ground.

    Connector & terminal 

    (F78) No. 2 (+) - Chassis ground (-): 

 Is the voltage more than 4 V? Go to step 3.  Go to step 2. 
2 CHECK HARNESS BETWEEN AMBIENT TEMPERATURE SENSOR AND COMBINATION METER. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from combination meter.
  3. Measure the resistance between the ambient temperature sensor harness connector terminal and combination meter harness connector terminal.

    Connector & terminal 

    (F78) No. 1 - (i10) No. 25: 

    (F78) No. 2 - (i10) No. 24: 

 Is the resistance less than 10 Ω? Replace the combination meter printed circuit. Repair the wiring harness.
3 CHECK AMBIENT SENSOR. 
  1. Remove the ambient temperature sensor.
  2. Check the ambient temperature sensor. <Ref. to INSPECTION , Ambient Sensor. >
 Is the ambient temperature sensor OK? Go to step 4.  Replace the ambient sensor.
4 CHECK OUTSIDE TEMPERATURE INDICATOR. 
  1. Connect the combination meter harness connector.
  2. Connect a resistor (3 kΩ) between the terminals of ambient sensor harness connector.
  3. Turn the ignition switch to ON and check the outside temperature indicator display.
 Is the outside temperature indicator indicating 25°C (77°F)? Repair the poor contact of ambient temperature sensor harness connector. Replace the combination meter print circuit.
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