Select lever position
R
D
2
L
Gear position to be fixed
Reverse
4th (O / D)
3rd
1st
7B1-20
AUTOMATIC TRANSMISSION (4 A / T)
FAIL SAFE TABLE
This function is provided by the safe mechanism that assures safe driveability even when the solenoid valve, sen-
sor or its circuit fails.
The table below shows the fail safe function for each fail condition of solenoid, solenoid or its circuit.
DTC NO.
TROUBLE AREA
FAIL SAFE OPERATION
P0753
21
22
Shift solenoid-A valve
or its circuit
D
Power supply to shift solenoid, TCC solenoid and pressure
control solenoid is cut.
D
Gear position is fixed as shown below.
P0758
23
24
Shift solenoid-B valve
or its circuit
P0748
41
42
Pressure control
solenoid valve or its
circuit
P1702
52
TCM
D
Lock-up function is inhibited to operate. (Except P1702.)
P0743
25
26
TCC solenoid valve or
its circuit
D
Lock-up function is inhibited to operate.
D
When TCC solenoid circuit is shorted to power circuit and vehicle
speed is less than 10 km / h (6 mile / h), gear position is fixed in 1st
gear for prevention of engine stall.
P0705
34
Transmission range
sensor or its circuit
D
In case of circuit open, selected range is set as “D” range.
D
In case of circuit short (In case that 2 or more sensor signals are
inputted), selected range is set in priority order shown below.
D>2>L>R>N>P
D
Reverse control operation, which inhibit reverse driving at “R”
range while vehicle runs forward more than 7 km / h (4 mile / h),
is inhibited.
P0725
35
Engine speed input
circuit or ECM
D
Maximum value of line pressure is outputted.
D
Engine speed which is used for A / T control is supposed to be
0 rpm.
P0710
36
38
Transmission
temperature sensor
or its circuit
D
A / T fluid temperature which is used for A / T control is supposed
to be 200
_
C (392
_
F).
D
Lock-up function is inhibited to operate.
D
Line pressure control which defuse shift shock is inhibited.
P0715
37
Input shaft speed
sensor or its circuit
D
Lock-up function is inhibited to operate.
D
Line pressure control which defuse shift shock is inhibited.
P1730
64
Engine torque signal
circuit or ECM
D
Maximum value of line pressure is outputted.