Expedition 2WD V8-5.4L (2009)
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Ignition OFF.
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Disconnect: LTM C4174a.
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Ignition ON.
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Measure the voltage between the LTM C4174a-4, circuit SBB36 (GN/RD), harness side and ground and between the LTM C4174a-9, circuit
SBP14 (BN/RD), harness side and ground.
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Are the voltages greater than 10 volts?
Yes
GO to J2.
No
VERIFY the SJB fuse 14 (10A) and Battery Junction Box (BJB) fuse 36 (30A) 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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J2 CHECK THE LTM 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 LTM C4174a-1, circuit GD149 (BK/GY), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
GO to J3.
No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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J3 CHECK THE MS-CAN CIRCUITS BETWEEN THE LTM AND THE DLC FOR AN OPEN
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Disconnect: LTM C4174b.
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Measure the resistance between the LTM C4174b-11, circuit VDB06 (GY/OG), harness side and the Data Link Connector (DLC) C251-3, circuit
VDB06 (GY/OG), harness side.
