Focus L4-2.0L (2009)
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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
The CAN has tested within specifications. Go To Pinpoint Test l to diagnose the intermittent MS-CAN fault. See: Pinpoint Test I: The HVAC Module
Does Not Respond To The Scan Tool
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M5 CHECK THE MS-CAN TERMINATION RESISTOR
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Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness
side.
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Is the resistance between 108 and 132 ohms?
Yes
GO to M6.
No
GO to M9.
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M6 CHECK THE MS-CAN TERMINATION RESISTOR WITH THE SJB DISCONNECTED
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Disconnect: Smart Junction Box (SJB) C2280b.
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Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness
side.
-
Is the resistance between 108 and 132 ohms?
Yes
GO to M7.
No
GO to M8.
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M7 CHECK THE MS-CAN CIRCUITS BETWEEN THE SJB AND THE
DLC FOR AN OPEN
