Road Test - Suzuki Swift User Manual

AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-35

ROAD TEST

This test is to check if upshift and downshift take place at specified
speeds while actually driving vehicle on a level road.
WARNING:
D Carry out the test in very little traffic area to prevent an ac-
cident.
D The test requires 2 persons, a driver and a tester.
1) Warm up engine.
2) With engine running at idle, shift selector lever to D range.
3) i) Accelerate vehicle speed by depressing accelerator pedal
very little (within 4 deg. of throttle valve opening).
ii) Check if upshift takes place from 1st to 2nd at about 18 km/h
(11 mile/h) and from 2nd to 3rd at about 30 km/h (19 mile/h).
iii) [For G10 Engine Model]
Stop vehicle once. Then start it again and while accelerating
by depressing accelerator pedal fully, check if upshift takes
place from 1st to 2nd at 52 km/h (33 mile/h) and from 2nd to
3rd at 97 km/h (61 mile/h).
[For G13 Engine Model]
Stop vehicle once. Then start it again and while accelerating
by depressing accelerator pedal fully, check if upshift takes
place from 1st to 2nd at 58 km/h (36 mile/h) and from 2nd to
3rd at 110 km/h (69 mile/h).
iv) Stop vehicle again.
v) Start vehicle and keep it running at 25 km/h (15 mile/h) and
then release accelerator pedal completely. 1 or 2 seconds lat-
er, depress accelerator pedal fully and check if downshift
from 2nd to 1st takes place.
vi) Keep vehicle running at 75 km/h (47 miles/h) and in the
same way as in step v), check if downshift from 3rd to 2nd
takes place.
vii)If upshift or downshift fails to take place at each specified
speed in the road test, possible causes for such failure are as
follows. Check each part which is suspected to be the cause.
Condition
No upshift from 1st
to 2nd
No upshift from
2nd to 3rd
No downshift from
2nd to 1st or 3rd to
2nd
Possible causes
D 1 – 2 shift valve defective
D 2nd brake solenoid valve defective
D PCM defective, or disconnection or
poor connection in electric circuit
D 2-3 shift valve defective
D Direct clutch solenoid valve defective
D PCM defective, or disconnection or
poor connection in electric circuit
D Throttle position sensor defective
D PCM defective, or disconnection or
poor connection in electric circuit