Mazda RX-8 Workshop Manual page 702

8 Verify the following:
Vacuum
connection
External fuel
shut off or
accessory (such
as kill switch,
alarm.)
Fuel quality:
proper octane,
contamination,
winter/summer
blend
No air leakage
from intake-air
system
Proper sealing of
intake manifold
Ignition wiring
Electrical
connections
Fuses
Smooth
operation of
throttle valve
Are all items normal?
9 Turn the ignition switch to the
ON position (engine off).
Retrieve any DTCs using the M-
MDS.
(See ON-BOARD DIAGNOSTIC
TEST [13B-MSP].)
Are there any DTCs displayed?
Yes Go to the next step.
No Service if necessary.
Repeat Step 8.
Yes DTC is displayed:
Go to the applicable DTC inspection.
(See
Communication error message is displayed:
Inspect for the following:
DTC TABLE [13B-MSP].)
Open circuit between
main relay and PCM
terminal 1AW or 1BE
Open main relay GND
circuit
Main relay is stuck open