Check Outside Temperature Indicator

WARNING: This page is about a different car, the 2006 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OUTSIDE TEMPERATURE INDICATOR CHART

Step	Check	Yes	No
1 CHECK POWER SUPPLY FOR AMBIENT SENSOR. Turn ignition switch OFF. Disconnect connector from ambient sensor. Turn ignition switch ON. Measure voltage between ambient sensor harness connector terminal and chassis ground. Connector & terminal (F78) No. 1 (+) - Chassis ground (-):	Is the measured value more than 4 V?	Go to step 2.	Check harness for open or short between ambient sensor and combination meter.
2 CHECK AMBIENT SENSOR. Turn ignition switch OFF. Remove ambient sensor. Check ambient sensor. < Ref. to INSPECTION , AMBIENT SENSOR. >	Is the ambient sensor OK?	Go to step 3.	Replace the ambient sensor.
3 CHECK HARNESS BETWEEN AMBIENT SENSOR AND COMBINATION METER. Disconnect connector from combination meter. Measure resistance between ambient sensor harness connector terminal and combination meter harness connector terminal. Connector & terminal F78) No. 2 - (I10) No. 22:	Is the measured value less than 10 Ω?	Go to step 4.	Repair wiring harness.
4 CHECK OUTSIDE TEMPERATURE INDICATOR. (H4DOTC) Connect combination meter harness connector. Connect a resistor (1.7 kΩ) between terminals of ambient sensor harness connector. Turn ignition switch ON and check the outside temperature indicator display.	Is the outside temperature indicator indicating 25°C (77°F)?	Outside temperature indicator is OK.	Replace combination meter printed circuit.