F 350 2WD Super Duty V10-6.8L (2009)
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Is the voltage greater than 10 volts?
Yes
GO to C3.
No
GO to C4.
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C3 CHECK THE DOOR AJAR GROUND CIRCUITS FOR AN OPEN
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Disconnect: Negative Battery Cable.
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Measure the resistance between the suspect ajar switch connector, harness side and ground as follows:
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Is the resistance less than 5 ohms?
Yes
INSTALL a new ajar switch in question. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
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C4 CHECK THE DOOR AJAR SWITCH INPUT CIRCUITS
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Disconnect: SJB C2280c.
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Measure the resistance between the suspect ajar switch connector, harness side and the SJB connector, harness side as follows:
