Town Car V8-4.6L VIN V Flex Fuel (2006)
N15-N16
Normal Operation
The following modules communicate using the CAN:
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powertrain control module (PCM)
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instrument cluster
-
anti-lock brake system (ABS) module
The CAN has an unshielded twisted pair cable, data bus plus circuit 1827 (WH/LG) and data bus minus circuit 1828 (PK/LG). The CAN permits
inter-module communications between the data link connector (DLC), the instrument cluster, the PCM, and the ABS module. When the diagnostic
tool communicates to modules on the CAN, the diagnostic tool must request all information or initiate module commands.
Check the CAN circuits between each network module and the DLC C251. The total resistance values must not be more than 5 ohms. If the resistance
is more than 5 ohms there is an open in one of the CAN circuits, damage to the DLC C251, damage to one of the module connectors, or a problem in
an in-line connector.
Possible Causes
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CAN data plus circuit 1827 (WH/LG) open, short to ground, or short to voltage
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CAN data minus circuit 1828 (PK/LG) open, short to ground, or short to voltage - DLC C251
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PCM C175b
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instrument cluster C220
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ABS module C135
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PCM
-
instrument cluster
-
ABS module
Test O: No Standard Corporate Protocol (SCP) Network Communications
PINPOINT TEST O: NO STANDARD CORPORATE PROTOCOL (SCP) NETWORK COMMUNICATIONS
