Mazda RX-8 Workshop Manual page 4148

Using M-MDS
Connect the M-MDS to the DLC-2
Using the simulation function "FP", start the fuel pump. (See
DIAGNOSTIC TEST
CAUTION:
Shorting the wrong terminal of the check connector may cause malfunctions.
Make sure to short only the specified terminal.
Without using M-MDS
Ground check connector terminal F/P to the body using a jumper wire.
CAUTION:
Turn the ignition switch to the ON position and operate the fuel pump.
NOTE:
[13B-MSP].)
The fuel pump may malfunction if it is operated without any
fuel in the fuel tank (fuel pump idling). Constantly monitor the
amount of fuel being discharged and immediately stop
operation of the pump when essentially no fuel is being
discharged.
ON-BOARD