Mazda RX-8 2004 Service Highlights page 272

DTC On-board diagnostic
No. function
Shift solenoid B circuit
malfunction (open circuit/
P0763
short to ground or power
supply)
Shift solenoid C
P0766
malfunction (stuck off)
Shift solenoid C
P0767
malfunction (stuck on)
Shift solenoid C circuit
malfunction (open circuit/
P0768
short to ground or power
supply)
Oil pressure switch B
P0841
circuit malfunction
Oil pressure switch C
P0846
circuit malfunction
Oil pressure switch F
P0871
circuit malfunction
P0882 TCM B+ low
GND return circuit
P0960
malfunction
2-4 brake fail-safe valve
P1759
malfunction
Low and reverse brake fail-
P1764
safe valve malfunction
U0073 CAN bus off
TCM cannot receive any
U0100
signals from the PCM
End Of Sie
ON-BOARD DIAGNOSTIC
Detection condition
• Open or short circuit in shift solenoid
B signal system (when the TCM
monitors solenoid output voltage,
voltage that differs from the ON/OFF
signal output by CPU in TCM is
detected).
• Large difference between actual gear
ratio and gear ratio set in TCM
• Large difference between actual gear
ratio and gear ratio set in TCM
• Open or short circuit in shift solenoid
C signal system (when the TCM
monitors solenoid output voltage,
voltage that differs from the ON/OFF
signal output by CPU in TCM is
detected).
• When driving, hydraulic pressure
should be generated in the 2-4 brake,
but oil pressure switch B does not
turn on.
• When driving, hydraulic pressure
should not be generated in the 2-4
brake, but oil pressure switch B does
not turn off.
• When driving, hydraulic pressure
should be generated in the high
clutch, but oil pressure switch C does
not turn on.
• When driving, hydraulic pressure
should not be generated in the high
clutch, but oil pressure switch C does
not turn off.
• When driving, hydraulic pressure
should be generated in the low and
reverse brake, but oil pressure switch
F does not turn on.
• When driving, hydraulic pressure
should not be generated in the low
and reverse brake, but oil pressure
switch F does not turn off.
• The TCM monitors the voltage of
back-up battery positive terminal at
TCM terminal 1A. If the TCM detects
battery positive terminal voltage 4 V
or less for 100 s or more, the TCM
determines that the backup voltage
circuit has malfunction.
• TCM detects an open circuit in the
GND return signal line from the
solenoid valve.
• TCM detects 2-4 brake fail-safe valve
malfunction.
• TCM detects low and reverse brake
fail-safe valve malfunction.
• CAN controller damaged.
• TCM cannot receive any signals from
the PCM.
Fail-safe
• Driving restricted to 3GR
• Stops operation of TCC
solenoid valve (OFF).
N/A
N/A
• Driving restricted to 3GR
• Stops operation of TCC
solenoid valve (OFF).
N/A
N/A
N/A
N/A
• Driving restricted to 3GR
• Stops operation of TCC
solenoid valve (OFF).
N/A
N/A
• CAN communication is
stopped
• Driving restricted to 3GR
• Stops operation of TCC
solenoid valve (OFF).
TCC
Disabled
Enabled
Enabled
Disabled
Disabled
05–02
Disabled
Disabled
Enabled
Disabled
Disabled
Disabled
Disabled
Disabled
05–02–7