Mazda RX-8 2009 Service Highlights page 298

Troubleshooting procedure
When CAN system is thought to be malfunctioning based on repair order form and symptom,
Verify DTCs of all modules.
Are any DTCs
output?
Yes
Are DTCs not shown in
DTC table output?
No
Are DTCs U0073, U1900,
U2516, 16Er:12 displayed?
No
There could be open circuit in CAN lines.
Determine the open circuit location using DTC output pattern.
Revised 6/2008 (Ref. No. R116/08)
2009 Mazda RX-8 Service Highlights (3452–1U–08C)
CONTROL SYSTEM
Vehicle in repair shop
Verify repair order
form and symptom
perform on-board diagnosis using the following procedure.
Perform vehicle identification using M-MDS.
Yes
Is vehicle identified?
No
Perform symptom troubleshooting.
Perform troubleshooting according
Yes
to corresponding DTC inspection.
After repair, verify DTCs of all
control modules.
Inspect DTCs U0073, U1900, U2516 .
Yes
Inspect DTCs U2516, 16:Er12.
No
Verify communication condition
between M-MDS and vehicle.
OR
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