Suzuki Wagon R Manual page 1594

DTC P0715 Input/turbine speed sensor circuit malfunction
1. Input shaft speed sensor
DTC DETECTING CONDITION
• Input shaft speed sensor signal voltage too high or too low.
Step
1 Was "AUTOMATIC TRANSMISSION DIAGNOSTIC
FLOW TABLE" performed?
2 1) Turn ignition switch OFF and disconnect output shaft
speed sensor – input shaft speed sensor coupler.
2) Measure resistance between terminals of the discon-
nected sensor side coupler.
Is it 160 – 200 Ω?
(See figure.)
3 1) Connect output shaft speed sensor - input shaft
speed sensor coupler then disconnect TCM couplers.
2) Measure resistance between terminal "E12-7" and
"E12-15" of disconnected harness side coupler.
Is it 160 – 200 Ω?
4 Measure resistance between terminal "E12-7" (of discon-
nected harness side coupler) and body ground then ter-
minal "E12-15" (of disconnected harness side coupler)
and body ground.
Are they about 0 Ω?
(See figure.)
2. TCM couplers (viewed from harness side)
Action
AUTOMATIC TRANSMISSION (4 A/T) 7B-27
3. TCM
Yes
Go to Step 2. Go to "AUTOMATIC
TRANSMISSION DIAG-
NOSTIC FLOW TABLE".
Go to Step 3. Replace input shaft speed
sensor.
Go to Step 4. "Lg" or "Lg/B" wire open
or shorted each other.
Short in Poor connection of termi-
between "Lg" nal "E12-7" or "E12-15" of
wire and ground TCM.
or "Lg/B" wire If all the above are in good
and ground. condition, substitute a
known-good TCM and
recheck.
No