Five Hundred AWD V6-3.0L VIN 1 (2005)
M21-M24
Normal Operation
The high speed CAN has an unshielded twisted pair cable, circuits 1908 (WH) and 1909 (BK). The differential electronic module (DEM) (if
equipped), the anti-lock brake system (ABS) module, the transmission control module (TCM) - 6-speed transaxle, the TCM - continuously variable
transaxle (CVT), the instrument cluster, the powertrain control module (PCM) and the RCM all use the high speed CAN. The high speed CAN
remains operational with the severing of one of the high speed CAN circuits or if the data minus circuit is shorted to ground. Communication may also
continue if one of the termination resistors is lost. The high speed CAN does not remain operational if the data plus circuit is shorted to ground or
shorted to voltage. The high speed CAN also does not remain operational if the data minus circuit is shorted to voltage. 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 high speed CAN circuits, damage to the data link
connector (DLC) C251, damage to one of the communications network module connectors, or damage to an in-line connector.
Possible Causes
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high speed CAN circuits 1908 (WH) and 1909 (BK) short to ground or open
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DLC C251
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ABS module
-
DEM (if equipped)
-
instrument cluster
