F 550 2WD Super Duty V10-6.8L (2009)
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Are the voltages greater than 10 volts?
Yes
GO to G2.
No
VERIFY the Battery Junction Box (BJB) fuses 37 (10A) and 72 (15A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring
Diagrams to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
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G2 CHECK THE TCM 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 TCM harness side and ground as follows:
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Are the resistances less than 5 ohms?
Yes
GO to G3.
No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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G3 CHECK THE HS-CAN CIRCUITS BETWEEN THE TCM AND THE
DLC FOR AN OPEN
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Measure the resistance between the TCM C1750-47, circuit VDB04 (WH/BU), harness side and the Data Link Connector (DLC) C251-6, circuit
VDB04 (WH/BU), harness side.
