F 550 4WD Super Duty V10-6.8L (2009)
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Ignition OFF.
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Disconnect: TBC Module C2142.
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Ignition ON.
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Measure the voltage between ground and:
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TBC module C2142-8, circuit SBB05 (GY/RD), harness side.
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TBC module C2142-12, circuit CBP33 (WH/BN), harness side.
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Are the voltages greater than 10 volts?
Yes
GO to G5.
No
VERIFY BJB fuse 5 (30A) is OK. If OK, REPAIR circuit SBB05 (GY/RD).
VERIFY SJB fuse 33 (10A) is OK. If OK, REPAIR circuit CBP33 (WH/BN).
If either fuse is not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.
CLEAR the DTCs. REPEAT the self-test.
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G5 CHECK THE TBC MODULE GROUND CIRCUIT FOR AN OPEN
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Ignition OFF.
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Measure the resistance between TBC module C2124-11, circuit GD115 (BK/GY), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
GO to G6.
No
REPAIR circuit GD115 (BK/GY). CLEAR the DTCs. REPEAT the self-test.
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G6 CHECK THE TBC MODULE PWM OUTPUT CIRCUIT FOR AN OPEN
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Disconnect: Trailer Tow C4099.
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Measure the resistance between trailer tow C4099-3, circuit CAT19 (BU), harness side and TBC module C2142-14, circuit CAT19 (BU), harness
side.
