Focus L4-2.0L (2009)
GO to C2.
No
GO to C4.
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C2 CHECK THE IC GROUND CIRCUITS
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Measure the resistance between the IC C220-9, circuit GD134 (BK/VT), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to C3.
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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C3 CHECK THE IC VOLTAGE SUPPLY CIRCUITS
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Disconnect: IC C220.
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Ignition ON.
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Measure the voltage between the IC C220-19, circuit SBP26 (YE/RD), harness side and ground; and between the IC C220-20, 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 SJB fuses 26 (10A) or 29 (5A) 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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C4 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE
IC FOR AN OPEN
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Measure the resistance between the IC C220-15, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness
side.