Expedition 2WD V8-5.4L (2009)
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Are the resistances less than 5 ohms?
Yes
GO to L3.
No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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L3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE AUDIO DSP MODULE FOR AN OPEN
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Disconnect: Audio DSP Module C2364c.
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Measure the resistance between the audio DSP module C2364c-11, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06
(GY/OG), harness side.
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Measure the resistance between the audio DSP module C2364c-1, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07
(VT/OG), harness side.
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Are the resistances less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to L4.
No
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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L4 CHECK FOR CORRECT AUDIO DSP MODULE OPERATION
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Disconnect all the audio DSP module 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 all the audio DSP module connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
