Mazda RX-8 2004 Service Highlights page 269

DTC On-board diagnostic
No. function
Transmission fluid
temperature (TFT) sensor
P0713 circuit malfunction (open
circuit/short to power
supply)
Turbine sensor circuit
P0715
malfunction
Vehicle speed sensor
P0720 (VSS) malfunction (open
circuit/short to ground)
Gear 1 incorrect (incorrect
P0731
gear ratio detected)
05–02–4
ON-BOARD DIAGNOSTIC
Detection condition
• Vehicle speed is 20 km/h {12.4 mph}
or more, and signal from TFT sensor
is 2.4 V or more for 150 s or more.
• The following condition is detected
twice:
— Turbine sensor signal is 300 rpm
or less while engine speed is
1,500 rpm or more and vehicle
speed is 40 km/h {25 mph} or
more in D range for 2 s or more.
• While driving in D range at a speed of
2,000 rpm or more (25.5 s or more
after shifting to D range), vehicle
speed signal is 5 km/h {3 mph} or
less for 3.5 s or more.
• TCM monitors the rotation ratio of the
parking gear compared to reverse
and high clutch drum when the
following monitoring conditions are
met. If the rotation ratio is 2.283 or
less, or 3.287 or more, the TCM
determines that there is malfunction.
Monitoring condition:
— 2 s or more after shifting to D
range
— Vehicle speed 10 km/h {6 mph} or
more
— Engine speed 1,000 rpm or more
— Turbine speed 400 rpm or more
— Ratio between engine speed and
turbine speed less than 1.1
— Throttle opening angle 12.5% or
more
— Engine torque 80 N·m {8.2 kgf·m,
59 ft·lbf} or more
— ATF temperature within 20—150
°C {68—302 °F}
— None of the following are present:
DTC P0705, P0706, P0711,
P0712, P0713, P0715, P0720,
P0751, P0753, P0758, P0761,
P0762, P0763, P0766, P0767,
P0768, P0882, P0960, U0073,
U0100.
Fail-safe
• Engine coolant
temperature signal is used
for shifting.
• Feedback control disabled
• Torque reduction control
disabled
• If the ECT has a
malfunction, ATF
temperature is controlled
at 80 °C {176 °F}
• Driving restricted to 3GR
• Stops operation of TCC
solenoid valve (OFF).
• Driving restricted to 3GR
• Stops operation of TCC
solenoid valve (OFF).
N/A
TCC
Enabled
Disabled
Disabled
Disabled