Mazda RX-8 Workshop Manual page 3080

Diagnostic procedure
CAUTION:
When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the
connector terminals.
Step
1 VERIFICATION BEFORE SERVICING
Are any DTCs, except the following, displayed?
U0073
U1900
U2516
2 INSPECTION OF CONTROL MODULE CONNECTOR
OUTPUTTING DTCs
Inspect the terminal condition of the control
module connector outputting DTCs and the
mid-connector.
Are the connector terminals normal without
damage, deformation, corrosion, or
disconnection?
3 INSPECTION OF POWER SUPPLY OF CONTROL MODULE
Inspection
YesDetermine the open circuit location referring to
CIRCUIT LOCATION (HS-CAN) [MULTIPLEX COMMUNICATION
SYSTEM].
No Go to the next step.
YesGo to the next step.
No Repair or replace the connector, then go to Step 9.
YesGo to the next step.
Action
DETERMINING OPEN