Navigator 4WD V8-5.4L (2010)
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C3 CHECK THE IC VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
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Disconnect: IC C220.
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Ignition ON.
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Measure the voltage between the IC C220-1, circuit SBP26 (YE/RD) harness side and ground; and between the IC C220-14, circuit CBP29
(WH/VT) harness side and ground.
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Are the voltages greater than 10 volts?
Yes
GO to C5.
No
VERIFY the Smart Junction Box (SJB) fuse 26 (10A) or fuse 29 (5A) is 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. See: Diagrams/Electrical
Diagrams/Diagrams By Number
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C4 CHECK THE HS-CAN CIRCUITS BETWEEN THE IC AND THE DLC FOR AN OPEN
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Measure the resistance between the IC C220-7, circuit VDB04 (WH/BU), harness side and the Data Link Connector (DLC) C251-6, circuit
VDB04 (WH/BU), harness side.
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Measure the resistance between the IC C220-8, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
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Are the resistances less than 5 ohms?
Yes
GO to C5.
No
