Suzuki WagonR+ RB310 Service Manual page 2774

DTC 36 – A/T FLUID TEMPERATURE SIGNAL
(NO A/T FLUID TEMPERATURE SIGNAL INPUTTED)
DTC 38 – A/T FLUID TEMPERATURE SIGNAL
(A/T FLUID TEMPERATURE SIGNAL INPUT VOLTAGE DOES NOT GO
DOWN EVEN THOUGH STANDARD VALUE OF ENGINE REV. SIGNAL
INPUTTED)
STEP
1 1) Turn ignition switch OFF and disconnect
solenoid wire harness coupler.
2) Turn ignition switch ON then measure
voltage between "G" wire terminal of
disconnected harness side coupler and
engine ground.
Is it about 5V?
2 1) Turn ignition switch OFF and connect
solenoid wire harness coupler.
2) Turn ignition switch ON then measure
voltage between "Bl" lead wire terminal of
solenoid wire harness coupler and engine
ground (with coupler connected).
Is it about 5V?
3 Check A/T fluid temperature sensor referring
to A/T FLUID TEMPERATURE SENSOR
INSPECTION in this section.
Is it OK?
ACTION
AUTOMATIC TRANSMISSION (4 A / T) 7B-43
YES
Go to Step 2.
Broken "Bl" lead wire or
poor connection of "A24"
terminal at TCM.
If all the above are in good
condition, substitute a
known-good TCM and
restart the troubleshooting.
Short in between "G" lead
wire and 5V power source
or short in between A/T
fluid temp. sensor lead
wire and 5V power source.
If all the above are in good
condition, the cause can
be a temporary
malfunction of the TCM.
1. A / T fluid temperature
sensor
2. Coupler
3. TCM coupler (viewed from
harness side)
NO
D Broken "G" lead wire or
shorted to 12 V power
source.
D Poor connection of
"A11" terminal at TCM.
If all the above are in
good condition, substitute
a known-good TCM and
restart the troubleshooting.
Go to Step 3.
Replace A/T fluid
temperature sensor.