Suzuki Wagon R Manual page 731

7B-20 AUTOMATIC TRANSMISSION (4 A / T)
STALL TEST
This test is to check overall performance of automatic transmission
and engine by measuring stall speed at "D" and "R" ranges. Be sure
to perform this test only when transmission fluid is at normal operat-
ing temperature and its level is between FULL and LOW marks.
CAUTION:
D Do not run engine at stall more than 5 seconds continu-
ously, for fluid temperature may rise excessively high.
D After performing stall test, be sure to leave engine running
at idle for longer than 30 seconds before another stall test.
1) Apply parking brake and block wheels.
2) Install tachometer.
3) Start engine with select lever shifted to "P".
4) Depress brake pedal fully.
5) Shift select lever to "D" and depress accelerator pedal fully while
watching tachometer. Read engine rpm quickly when it has be-
come constant (stall speed).
6) Release accelerator pedal immediately after stall speed is
checked.
7) In the same way, check stall speed in "R" range.
8) Stall speed should be within following specification.
Stall speed: 2,700 – 3,100 r/min
Test result
Lower than D Lack of engine output
standard level D Defective torque converter
Higher than D Low line pressure
standard level D Malfunctioning 1st & 2nd brake
in "D" range D Malfunctioning rear clutch
D Malfunctioning stator one-way clutch
D Low line pressure
Higher than D Malfunctioning rear clutch
standard level D Malfunctioning reverse brake
in "R" range D Malfunctioning stator one-way clutch
D Malfunctioning direct clutch
Possible cause