F 150 4WD V8-4.6L VIN 8 (2010)
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Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit
VDB05 (WH), harness side and ground.
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Are the resistances greater than 1,000 ohms?
Yes
GO to X4.
No
GO to Pinpoint Test W. See: Pinpoint Test W: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not
Responding
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X4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE
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Connect the negative battery cable.
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Ignition ON.
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Measure the voltage between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit
VDB05 (WH), harness side and ground.
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Is the voltage greater than 6 volts?
Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to X5.
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X5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM AND TCM DISABLED
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Disconnect: Battery Junction Box (BJB) Fuses 26 (10A) and 53 (5A).
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Enter the following diagnostic mode on the scan tool: Network Test.
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Repeat the network test.
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Do all other HS-CAN modules pass the network test?
Yes
INSTALL the removed fuses.
If the vehicle is equipped with a Transmission Control Module (TCM), GO to X6.
If the vehicle is not equipped with a TCM, GO to Pinpoint Test A. See: Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
No
