2000 SUZUKI SWIFT torque

7B-2 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
Table B-1 Gear Shift Failure in “D” or
“2” Range 7B-38. . . . . . . . . . . . . . . . . . . . . . . . . .
Table B-2 Gear is Shifted to 2nd Gear in
“L” Range Vehicle Does Not Move
Backward in “R” Range 7B-38. . . . . . . . . . . . . .
Transmission range sensor check 7B-39. . . . Output shaft speed sensor check 7B-39. . . . .
Shift solenoid valve circuit check 7B-40. . . . . .
Throttle position sensor check 7B-41. . . . . . . .
TIGHTENING TORQUE
SPECIFICATIONS7B-42 . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS7B-42 . . . . . . . . . . . . . . . . . . . . . .

1. Final gear
2. Differential gear assembly
3. Counter shaft
4. 1st and reverse brake
5. Counter driven gear11. Forward clutch
12. Direct clutch
13. Input shaft
14. Torque converter
15. Oil pump 6. Output shaft
7. Rear planetary gear
8. Front planetary gear
9. Valve body assembly
10. Oil strainer
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-3
GENERAL DESCRIPTION
The automatic transmission consists of the hydraulic torque converter, electronically controlled 3-speed automatic
transmission, countershaft and differential.
The transmission consists of 2 planetary gears, 2 disk clutches, 1 band brake, 1 disk brake and 1 one-way clutch.
Its operation is controlled by selecting a position from 6 positions (P, R, N, D, 2 and L ranges) manually by means
of the selector lever installed on the compartment floor.
In the D or 2 range, the gear ratio is changed for the 1st, 2nd or 3rd speed (D range only) automatically by engine
control module (electronic control).
For the automatic transmission fluid, DEXRON
-

E, DEXRON-


or its equivalent must be used. Lubrication
in the automatic transmission is provided by the oil pump which is operated by the engine revolution. Therefore,
the engine should not be stopped even during coasting to obtain proper lubrication.
When it becomes necessary to be towed, front wheels must be raised so as not to roll them.

ACCEPTABLE RANGE
1st gear (solenoids ON and ON)
2nd gear
(solenoids ON and OFF)
3rd gear
(solenoids OFF and OFF)
Vehicle speed
Engine speed
7B-28 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
DTC P0751 SHIFT SOLENOID-A (No.1) PERFORMANCE OR STUCK OFF
DTC P0756 SHIFT SOLENOID-B (No.2) PERFORMANCE OR STUCK OFF
CIRCUIT DESCRIPTION
PCM monitors throttle opening, engine speed, vehicle speed and gear position and compares the actual engine
speed and its specified value (i.e., engine speed obtained by PCM through calculation using the throttle open-
ing / gear position and vehicle speed).
DTC DETECTING CONDITION
POSSIBLE CAUSE

While running in “D” range after engine warmed up,
engine speed as compared with vehicle speed is not
within acceptable range.
2 driving cycle detection logic, continuous
monitoring.
A / T oil pressure control cable maladjusted

Selector cable maladjusted

Mechanical malfunction of shift solenoid valve
(stick or leakage)

Mechanical malfunction in transmission

Torque converter malfunction
DTC CONFIRMATION PROCEDURE
WARNING:

When performing a road test, select a place where there is no traffic or possibility of a traffic accident
and be very careful during testing to avoid occurrence of an accident.

Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Turn ignition switch OFF.
2) Clear DTC with ignition switch ON and warm up engine to normal operating temperature.
3) Shift selector lever to “D” range.
4) Start vehicle and increase vehicle speed to 40 – 55 km / h ( 25 – 35 mile / h) by depressing accelerator pedal half
a stroke.
5) Keep vehicle at above speed for 5 sec. or longer.
6) Increase vehicle speed to 75 – 90 km / h (45 – 55 mile / h) by depressing accelerator pedal half a stroke and keep
it at that speed for 5 sec. or longer.
7) Stop vehicle and check pending DTC and DTC.

7B-30 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
TABLE A-1 NO STARTING OR SLIPPING IN ANY DRIVE RANGE
STEPACTIONYESNO
1Was “AUTOMATIC TRANSMISSION DIAGNOSTIC
FLOW TABLE” performed?Go to Step 2.Go to
“AUTOMATIC
TRANSMISSION
DIAGNOSTIC FLOW
TABLE”.
2Is engine rpm at stall test normal?Transmission
failure.Go to Step 3.
3Is engine rpm at stall test too low in any range?Poor engine power or
torque converter
defective.Go to Step 4.
4Is engine rpm at stall test too high only in “D” range?Go to Step 7.Go to Step 5.
5Is engine rpm at stall test too high only in “R” range?Go to Step 9.Go to Step 6.
6Is line pressure proper?Transmission failure.Oil pump defective,
Regulator valve
operation failure,
Throttle valve
operation failure or
Accelerator cable
and oil pressure
control cable
maladjusted.
7Does engine rpm at stall test become normal when
coupler of solenoid valve wire is disconnected?One-way clutch
operation failure.Go to Step 8.
8Is line pressure proper?Forward clutch worn.Oil leak in forward
clutch oil circuit or Oil
leak in “D” range oil
circuit.
9Does engine rpm at stall test become normal when
coupler of solenoid valve wire is disconnected?1st-Reverse brake
worn.Go to Step 10.
10Is line pressure proper?Direct clutch worn.Oil leak in direct
clutch oil circuit or Oil
leak in “R” range oil
circuit.

7B-32 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
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
operating temperature (70–80C / 158–176F) and its level is be-
tween FULL HOT and LOW HOT. (Refer to “Fluid level” in this sec-
tion.)
CAUTION:
Do not run engine at stall more than 5 seconds continuous-
ly, for oil temperature may rise excessively high.
1) Install tachometer.
2) Apply parking brake and block vehicle wheels.
3) Start engine with selector lever shifted to P range.
4) Depress brake pedal.
5) Shift selector lever to D range and depress accelerator pedal ful-
ly while watching tachometer. Read engine rpm quickly when it
has become constant (stall speed).
6) Release accelerator pedal immediately after stall speed is
checked.
7) In the same way, check stall speed at R range.
8) Stall speed should be within following specification.
Stall speed: 2,500 – 2,900 r / min
(For both G10 and G13 engine models)
9) Possible causes for out-of-specification stall speed are as fol-
lows. Check each part which is suspected to be the cause.
Stall speed measured
Possible causes
Lower than specification
Engine output insufficient

Torque converter defective
Higher than specification in
D range
Forward clutch slippage

One-way clutch defective
Higher than specification in
R range
Direct clutch slippage

1st-reverse brake slippage

1. Drive shaft (LH)
2. Oil pan
7B-34 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
9) Possible causes for out-of-specification line pressure are as
follows. Check each part which is suspected to be the cause.
Line pressure
Possible causes
Higher than specification
in D and R ranges
Regulator valve defective

Throttle valve in valve body
defective

Accelerator cable and oil
pressure control cable
maladjusted
Lower than specification
in D and R ranges
Oil pump defective

Regulator valve defective

Throttle valve in valve body
defective

Accelerator cable and oil
pressure control cable
maladjusted
Lower than specification
only in D range
Forward clutch oil pressure
system oil leakage

D range oil pressure system
oil leakage
Lower than specification
only in R range
Direct clutch oil pressure
system oil leakage

1st-reverse brake oil
pressure system oil leakage

R range oil pressure system
oil leakage
10) Reinstall plug and tighten it to specification.
Tightening Torque
(a): 7.5 N·m (0.75 kg-m, 5.5 lb-ft)

7B-42 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
TIGHTENING TORQUE SPECIFICATIONS
Refer to the same section of the service manual mentioned in the “FOREWORD” of this manual.
SPECIAL TOOLS
Refer to the same section of the service manual mentioned in the “FOREWORD” of this manual.