E 450 V8-5.4L (2009)
REPAIR the circuit in question. TEST the system for normal operation.
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B7 CHECK THE AMBIENT AIR TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
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Ignition ON.
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Measure the voltage between the ambient air temperature sensor C132-1, circuit VH407 (YE/GN), harness side and ground; and between the
ambient air temperature sensor C132-2, circuit RH107 (GN/BU), harness side and ground.
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Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
INSTALL the original ambient air temperature sensor. CONNECT the ambient air temperature sensor. GO to B8.
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B8 CHECK THE TEMPERATURE ACCURACY
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Connect: Overhead Console C930.
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Drive the vehicle for 3 minutes above 56 km/h (35 mph) (sustained).
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Does the display show the correct ambient air temperature using a thermometer for a comparison?
Yes
The ambient air temperature function is OK. REVIEW the operation of the ambient air temperature display with the customer.
No
INSTALL a new compass display (overhead console). REFER to Compass Display See: Service and Repair. TEST the system for normal operation.
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