Mazda RX-8 Workshop Manual page 2380

Access TRQ_SENS PID.
Verify that the data monitor value
changes when the steering wheel is
turned.
Left: 0— -32 NM
Right: 0—31.75 NM
Do the torque sensor signal values
change in the same way?
INSPECT WHETHER MALFUNCTION IS CAUSED BY
2 POOR CONNECTION OF EPS CONTROL MODULE OR
PIN DEFORMATION
Turn the ignition switch off.
Inspect connection of the EPS control
module and wiring harness.
Disconnect the EPS control module
connector.
Inspect whether malfunction is caused
by bent or poorly connected EPS control
module connector pin.
Are the connector connection, connector
pins, and wiring harness normal?
INSPECT TORQUE SENSOR CIRCUIT FOR OPEN
3
CIRCUIT
Inspect for continuity between the EPS
control module terminals and torque
sensor terminals.
Is there continuity?
INSPECT TORQUE SENSOR CIRCUIT FOR SHORT
4
TO POWER
Measure the voltage between the torque
sensor terminals and ground.
EPS control module
terminal 3A—torque
sensor terminal A
EPS control module
terminal 3B—torque
sensor terminal B
EPS control module
terminal 3C—torque
sensor terminal C
Torque sensor terminal
A—ground
Torque sensor terminal
B—ground
YesGo to the next step.
No Repair or replace the faulty connector wiring harness,
then go to Step 7.
YesGo to the next step.
No Repair or replace the wiring harness for open circuit
between the EPS control module and torque sensor,
then go to Step 7.
YesRepair or replace the wiring harness for short to
power between the EPS control module and torque
sensor, then go to Step 7.
No Go to the next step.