Focus L4-2.0L (2009)
GO to L3.
No
CONNECT the negative battery cable. Go To Pinpoint Test M. See: Pinpoint Test M: No Medium Speed Controller Area Network (MS-CAN)
Communication, All Modules Are Not Responding
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L3 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO
GROUND
-
Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit
VDB07 (VT/OG), harness side and ground.
-
Are the resistances greater than 1,000 ohms?
Yes
CONNECT the negative battery cable. GO to L4.
No
CONNECT the negative battery cable. Go To Pinpoint Test M. See: Pinpoint Test M: No Medium Speed Controller Area Network (MS-CAN)
Communication, All Modules Are Not Responding
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L4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO
VOLTAGE
-
Ignition ON.
-
Measure the voltage between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07
(VT/OG), harness side and ground.
-
Are the voltages greater than 6 volts?
Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to L5.
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L5 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACM DISABLED
NOTE: When re-running the network test, the network test application must be closed first or the screen display reverts back to the prior run network
test results.
-
Disconnect: ACM C240a.
-
Enter the following diagnostic mode on the scan tool: Network Test.
-
Repeat the network test.
-
Do all other modules pass the network test?