Fail Safe Table - Suzuki Grand Vitara XL-7 Service Manual

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
21 Shift solenoid-A valve
P0753
22 or its circuit
23 Shift solenoid-B valve
P0758
24 or its circuit
Pressure control
41
P0748 solenoid valve or its
42
circuit
P1702 52 TCM
25 TCC solenoid valve or
P0743
26 its circuit
Transmission range
P0705 34
sensor or its circuit
Engine speed input
P0725 35
circuit or ECM
Transmission
36
P0710 temperature sensor
38
or its circuit
Input shaft speed
P0715 37
sensor or its circuit
Engine torque signal
P1730 64
circuit or ECM
FAIL SAFE OPERATION
D Power supply to shift solenoid, TCC solenoid and pressure
control solenoid is cut.
D Gear position is fixed as shown below.
Select lever position
R
D
2
L
D Lock-up function is inhibited to operate. (Except P1702.)
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.
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.
D Maximum value of line pressure is outputted.
D Engine speed which is used for A/T control is supposed to be
0 rpm.
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.
D Lock-up function is inhibited to operate.
D Line pressure control which defuse shift shock is inhibited.
D Maximum value of line pressure is outputted.
Gear position to be fixed
Reverse
4th (O/D)
3rd
1st