Mazda Mazda6 Workshop Manual Supplement page 482

DTC
On-board diagnostic function
No.
Shift solenoid B malfunction
P0758
(open/short)
Shift solenoid C malfunction
P0761
(stuck off)
Shift solenoid C malfunction
P0762
(stuck on)
Shift solenoid C malfunction
P0763
(open/short)
Reduction timing solenoid valve
P0768
malfunction (open/short)
Neutral shift solenoid valve
P0773
malfunction (open/short)
2-4 brake solenoid valve
P0778
malfunction (open/short)
Intermediate sensor malfunction
P0791
(open/short)
High clutch solenoid valve
P0798
malfunction (open/short)
P1710 GND return malfunction
U0073 CAN BUS OFF
TCM cannot receive any signals
U0100
from PCM
AUTOMATIC TRANSAXLE
Detection condition
• Open or short in shift
solenoid B circuit (Voltage
different from on/off signal
relayed by CPU in TCM is
detected while TCM is
monitoring solenoid output
voltage.)
• Difference between actual
gear ratio and gear ratio set
in TCM is large
• Difference between actual
gear ratio and gear ratio set
in TCM is large
• Open or short in shift
solenoid C circuit (Voltage
different from on/off signal
relayed by CPU in TCM is
detected while TCM is
monitoring solenoid output
voltage.)
• Open or short in reduction
timing solenoid valve circuit
(Voltage different from on/off
signal relayed by CPU in
TCM is detected while TCM
is monitoring solenoid
output voltage.)
• Open or short in neutral shift
solenoid valve circuit
(Voltage different from on/off
signal relayed by CPU in
TCM is detected while TCM
is monitoring solenoid
output voltage.)
• Open or short in 2-4 brake
solenoid valve circuit
(Voltage different from on/off
signal relayed by CPU in
TCM is detected while TCM
is monitoring solenoid
output voltage.)
• Rotation speed of output
gear (intermediate sensor)
is low when vehicle speed
and engine speed exceed
the pre programmed value
• Open or short in high clutch
solenoid valve circuit
(Voltage different from on/off
signal relayed by CPU in
TCM is detected while TCM
is monitoring solenoid
output voltage.)
• TCM detects open in GND
return signal of solenoid.
• CAN controller damaged.
• TCM cannot receive any
signals from PCM
Fail-safe
• Stops driving all ON/OFF
type solenoids (OFF) and
TCC solenoid valve (OFF)
—
—
• Stops driving all ON/OFF
type solenoids (OFF) and
TCC solenoid valve (OFF)
• Stops driving of reduction
timing solenoid valve (OFF)
• Stops driving of neutral shift
solenoid valve (OFF)
• Stops driving of pressure
control solenoid, 2-4 brake
solenoid valve, and high
clutch solenoid valve (OFF)
• Inhibit feedback control.
• Inhibit feedback control
• Inhibits torque reduction
control
• Stops driving of pressure
control solenoid, 2-4 brake
solenoid valve, and high
clutch solenoid valve (OFF)
• Inhibit feedback control.
—
• Throttle valve opening angle
is fixed (4/8) at the time in
order to determine shift
• Maximizes line pressure
TCC
Inhibition
Available
Available
Inhibition
Available
K2
Available
Available
Available
Available
Available
Inhibition
K2–67