Focus L4-2.0L (2009)
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Measure the resistance between the metal RCM case and a good chassis ground.
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Is the resistance less than 5 ohms?
Yes
GO to E4.
No
REPAIR the case ground connection. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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E4 CHECK THE HS-CAN CIRCUITS BETWEEN THE RCM AND THE
DLC FOR AN OPEN
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Measure the resistance between the RCM C310b-18, 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 RCM C310b-17, 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
CONNECT the negative battery cable. GO to E5.
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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E5 CHECK FOR CORRECT RCM OPERATION
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Disconnect all the RCM 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 RCM connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes
INSTALL a new RCM. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
