F 150 4WD V8-4.6L VIN 8 (2010)
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Ignition ON.
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Measure the voltage between the DSM C341B-1, circuit CBX03 (BU/RD), harness side and ground.
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Is the voltage within 0.2 volt of the recorded battery voltage?
Yes
GO to C5.
No
REPAIR the circuit for high resistance. CLEAR the DTC. REPEAT the self-test.
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C5 CHECK THE DSM GROUND CIRCUIT
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Ignition OFF.
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Disconnect: Negative Battery Cable .
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Disconnect: DSM C341A .
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Measure the resistance between the DSM C341B-24, circuit GD905 (BK/GN), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to C6.
No
REPAIR the circuit for high resistance. CONNECT the negative battery cable. TEST the system for normal operation.
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C6 CHECK FOR CORRECT DSM OPERATION
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Disconnect the DSM connectors.
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Check for:
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corrosion
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damaged pins
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pushed-out pins
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Connect the DSM connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes