Suzuki Wagon R RB310, Supplementary Service Manual

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AUTOMATIC TRANSMISSION (4 A/T) 7B-9
A/T hardware itself
(DTC P0730)
Difference in detected
revolution between
input shaft speed
sensor and output
shaft speed sensor is
too wide. “P” range
→
P, “R” range
→
R, “N” range
→
N,
“D”/“2”/“L” range “To be controlled as follows :
1) When detecting trouble at first, gear is selected well-suited
gear calculated with parameters of each sensor’s rev. num-
ber and gear position just when the trouble occurred. Lock-
up function is turned OFF.
2) If A/T can transmit driving force under the above condition,
gear is fixed the selected gear until ignition switch is turned
OFF.
3) If A/T can not transmit driving force under the above condi-
tion, after once vehicle stop, gear which can transmit drive
force is searched one by one until gear is found out. After
gear is found out, position of gear is held until ignition switch
is turned OFF.
Transmission range
sensor circuit
(DTC P0705)
No shift switch signal
is inputted or two or
more shift switch sig-
nals are inputted at
the same time. • When vehicle running, shift range position is fixed to shift
range position right before the trouble occurred until vehicle
stop and lock-up function is turned OFF.
• When vehicle is at stop after or during detecting the trouble,
gear is fixed as the followings and lock-up function is turned
OFF.
– When 2 adjoining gear position signals are inputted.
“P”, “R” range
→
R, “R”, “N” range
→
R,
“N”, “D” range
→
D, “D”, “2” range
→
D,
“2”, “L” range
→
2nd
– When 2 or more signals excepting above or no signal are
inputted.
“P” range
→
P, “R” range
→
R,
“N” range
→
N, “D”/“2”/“L” range
→
3rd
Transmission fluid
temperature sen-
sor circuit
(DTC P0710)
• A/T fluid temp. sig-
nal input voltage is
too low.
• A/T fluid temp. sig-
nal input voltage
does not go down
although standard
value of engine rev.
signal is inputted.
• When detecting circuit open, TCM control as fluid tempera-
ture is 100°C (212°F).
• Lock-up function is turned OFF.
Engine speed input
circuit
(DTC P0725)
Inputted engine rev.
signal is too low or
too high. • Engine rev. is processed as 4000 rpm.
• No compensation or judgement for gear shift control, for
which engine rev. is considered, is processed.
• Lock-up function is turned OFF.
Engine coolant
temp./Barometric
pressure signal cir-
cuit
(DTC P1709)
No or abnormal
engine coolant temp.
signal is inputted • No compensation for gear shift control, for which engine cool-
ant temp. and barometric pressure are considered, is pro-
cessed.
• Lock -up function is turned OFF.
Area Detecting condition Fail safe function