3 L4-2.5L (2010)
Information Bus: Scan Tool Testing and Procedures
M-MDS AND VEHICLE NOT COMMUNICATING [MULTIPLEX COMMUNICATION SYSTEM]
CAUTION:
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Perform the following on-board diagnosis according to See: Body and Frame/Body Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview troubleshooting procedure.
Detection Condition
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Possible causes of communication errors between the M-MDS and vehicle include communication circuit interruption due to an open circuit in the
CAN communication wiring harness, or poor contact of connector terminals, or a BUS OFF condition due to a short circuit in the CAN
communication wiring harness.
Possible Causes
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Open circuit in wiring harness between PCM and DLC-2
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Improper insertion, connector terminal damage, deformation, corrosion, or disconnection of PCM, BCM, connector C-02, connector C-41,
connector C-50, connector C-49, or connector C-42
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Short circuit in wiring harness between CAN system-related module CAN_L and CAN_H lines
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Short circuit to power supply in wiring harness between CAN system-related module
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Short circuit to ground in wiring harness between CAN system-related module
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Short circuit to power supply in CAN system-related module internal CAN lines
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Short circuit to ground in CAN system-related module internal CAN lines
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Damage, deformation, corrosion, or disconnection of DLC-2
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PCM power supply is not normal
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PCM ground is not normal
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PCM internal resistance is not normal
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CAN system-related module malfunction
Wiring Diagram
