E 450 V8-5.4L (2009)
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Measure the resistance between the overhead console C930-6, circuit RH107 (GN/BU), harness side and the ambient air temperature sensor
C132-2, circuit RH107 (GN/BU), harness side.
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Is the resistance less than 5 ohms?
Yes
GO to B5.
No
REPAIR the circuit. TEST the system for normal operation.
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B5 CHECK THE AMBIENT AIR TEMPERATURE SENSOR CIRCUITS FOR A SHORT TOGETHER
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Measure the resistance between the ambient air temperature sensor C132-1, circuit VH407 (YE/GN), harness side and the ambient air temperature
sensor C132-2, circuit RH107 (GN/BU), harness side.
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Is the resistance greater than 10,000 ohms?
Yes
GO to B6.
No
REPAIR the circuits. TEST the system for normal operation.
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B6 CHECK THE AMBIENT AIR TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO GROUND
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Measure the resistance 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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Are the resistances greater than 10,000 ohms?
Yes
GO to B7.
No