Grand Marquis V8-4.6L Flex Fuel (2010)
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Pinpoint Test J: Intermittent No High Speed Controller Area Network (HS-CAN) Communication,
One Or More Modules Are Not Respond
Communications Network
Pinpoint Tests
Pinpoint Test J: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Responding
During Network Test
Normal Operation
An open circuit (HS-CAN +) or (HS-CAN -) may cause intermittent or unreliable communication to all modules on the High Speed Controller Area
Network (HS-CAN). In the event that 1 of the 2 network circuits (HS-CAN + or HS-CAN -) becomes open to a module on the network, unreliable
network communication to all modules on the network may result.
This pinpoint test is intended to diagnose the following:
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Wiring, terminals or connectors
PINPOINT TEST J: INTERMITTENT NO HS-CAN COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING
NETWORK TEST
NOTE: Various modules set network DTCs during this test procedure. Clear DTCs from all modules after the diagnostic procedure is completed.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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J1 CHECK THE DLC PINS FOR DAMAGE
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Select DRIVE.
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Disconnect the scan tool cable from the Data Link Connector (DLC).
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Inspect DLC pins 6 and 14 for damage.
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Are DLC pins 6 and 14 OK?
Yes
GO to J2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
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J2 CHECK THE HS-CAN TERMINATION RESISTANCE
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Ignition OFF.
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Disconnect: Negative Battery Cable.
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Measure the resistance between the DLC C251-6, circuit 1827 (WH/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side.
