Mazda RX-8 Workshop Manual page 2361

INSPECT EPS MOTOR CIRCUIT FOR SHORT TO POWER
7
Measure the voltage between the EPS motor
terminals and ground.
Is there any B+?
INSPECT EPS MOTOR CIRCUIT FOR SHORT TO
8
GROUND
Inspect for continuity between the EPS motor
terminals and ground.
Is there continuity?
INSPECT EPS MOTOR GROUND CIRCUIT FOR OPEN
9
CIRCUIT
Disconnect the battery negative terminal.
Measure continuity between EPS control
module terminal 1B and battery negative
terminal.
Is there continuity?
VERIFY TROUBLESHOOTING COMPLETED
10
Make sure to reconnect all disconnected
connectors.
Clear the DTC from the memory.
(See ELECTRIC POWER STEERING (EPS) ON-
BOARD
Turn the ignition switch off.
Start the engine.
Is the same DTC present?
VERIFY AFTER REPAIR PROCEDURE
11
Are any other DTCs present?
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EPS motor terminal A—
ground
EPS motor terminal B—
ground
EPS motor terminal A—
ground
EPS motor terminal B—
ground
DIAGNOSIS.)
YesRepair or replace the wiring harness for short to
power between the EPS motor and noise filter, then
go to Step 10.
No Go to the next step.
YesRepair or replace the wiring harness for short to
ground between the EPS motor and noise filter, then
go to Step 10.
No Go to the next step.
YesGo to the next step.
No Repair or replace the wiring harness for open circuit
between the EPS control module and battery, then go
to the next step.
YesReplace the EPS control module, then go to the next
step.
(See EPS CONTROL MODULE
REMOVAL/INSTALLATION.)
No Go to the next step.
YesGo to the applicable DTC inspection.
(See ELECTRIC POWER STEERING (EPS) ON-BOARD
DIAGNOSIS.)
No DTC troubleshooting completed.