Mazda RX-8 Workshop Manual page 3033

< Previous Next >
2011 - RX-8 - Body and Accessories
M-MDS AND VEHICLE NOT COMMUNICATING [MULTIPLEX COMMUNICATION SYSTEM]
CAUTION:
Perform the following on-board diagnosis according to
procedure.
Detection Condition
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
Open circuit in wiring harness between PCM and data link connector-2
Improper insertion of PCM, connector C-07 or C-09 damage, deformation, corrosion, or disconnection of connector terminals
Short circuit in wiring harness between CAN system-related module CAN_L and CAN_H lines
Short circuit to power supply in wiring harness between CAN system-related module
Short circuit to ground in wiring harness between CAN system-related module
Short circuit to power supply in CAN-system related module internal CAN lines
Short circuit to ground in CAN system-related module internal CAN lines
Damage, deformation, corrosion, or disconnection of data link connector-2
PCM power supply is not normal
PCM ground is not normal
PCM internal resistance is not normal
CAN-system related module malfunction
Wiring Diagram
FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] troubleshooting