Explorer AWD V8-4.6L (2010)
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Are the voltages greater than 10 volts?
Yes
GO to I2.
No
VERIFY the Smart Junction Box (SJB) fuse 20 (10A) or fuse 28 (10A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. If not OK,
REFER to the Wiring Diagrams to identify the possible causes of the circuit short. REPEAT the network test with the scan tool. See:
Diagrams/Electrical Diagrams/Diagrams By Number
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I2 CHECK THE HVAC GROUND CIRCUIT FOR AN OPEN
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Ignition OFF.
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Disconnect: Negative Battery Cable.
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Measure the resistance between the HVAC module C228a-2, circuit GD145 (BK/BU) and ground.
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Is the resistance less than 5 ohms?
Yes
GO to I3.
No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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I3 CHECK THE MS-CAN CIRCUITS BETWEEN THE HVAC MODULE AND THE DLC FOR AN OPEN
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Measure the resistance between the HVAC module C228a-11, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06
(GY/OG), harness side.
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Measure the resistance between the HVAC module C228a-1, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07
(VT/OG), harness side.
