Explorer 4WD V6-4.0L (2009)
GO to AD6.
No
REPAIR the circuit. TEST the system for normal operation.
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AD6 CHECK CIRCUIT CAT19 (BU) FOR A SHORT TO GROUND
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Measure the resistance between the TBC module C238-3, circuit CAT19 (BU), harness side and ground.
-
Is the resistance greater than 10,000 ohms?
Yes
GO to AD7.
No
REPAIR the circuit. TEST the system for normal operation.
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AD7 CHECK CIRCUIT CAT19 (BU) FOR AN OPEN
-
Measure the resistance between the TBC module C238-3, circuit CAT19 (BU), harness side and the trailer tow C473-3, circuit CAT19 (BU),
harness side.
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Is the resistance less than 5 ohms?
Yes
INSTALL a new TBC module. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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AD8 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR (DOES NOT OPERATE CORRECTLY)
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With the brake pedal released, measure the voltage between the trailer tow connector pin 3, circuit CAT19 (BU), component side and ground.
