transmission oil SUZUKI SWIFT 2000 1.G SF310 Service Owner's Guide

7B-18 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
VISUAL INSPECTION
Visually check following parts and systems.
INSPECTION ITEM
REFERRING SECTION

A / T fluid– – – – – level, leakage, color

A / T fluid hoses – – – – – disconnection, looseness, deterioration

Throttle cable – – – – – play, installation

A / T oil pressure control cable and select cable – – – – – installation

Engine oil – – – – – level, leakage

Engine coolant – – – – – level, leakage

Battery – – – – – fluid level, corrosion of terminal

Connectors of electric wire harness – – – – – disconnection, friction

Fuses – – – – – burning

Parts – – – – – installation, bolt – – – – – looseness

Parts – – – – – deformation

Other parts that can be checked visually
Also check following items at engine start, if possible.

Malfunction indicator lamp

Charge warning lamp

Engine oil pressure warning lamp

Engine coolant temp. meter

Other parts that can be checked visuallySection 0B
Section 7B
Section 6E1 or 6E2
Section 7B
Section 0B
Section 0B
Section 6 or 6-1
Section 8
Section 6 or 6-1
Section 6H
Section 8 (Section 6A or 6A1 for
pressure check)

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.

AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-31
TABLE A-2 GEAR CHANGE FAILURE
STEPACTIONYESNO
1Was “AUTOMATIC TRANSMISSION DIAGNOSTIC
FLOW TABLE” performed?Go to Step 2.Go to “AUTOMATIC
TRANSMISSION
DIAGNOSTIC FLOW
TABLE”.
2Disconnect solenoid valve wire coupler and perform
manual road test.
Is upshift from 1st to 2nd possible?Go to Step 3.1-2 shift valve sticks
or Shift solenoid-B
(2nd brake solenoid)
valve sticks.
3Is upshift from 2nd to 3rd possible?Gear shift control
system defective.
Go to A / T Diagnostic
Flow Table B.2-3 shift valve sticks
or Shift solenoid-A
(Direct clutch
solenoid) valve
sticks.
TABLE A-3 EXCESSIVE SHOCK AT RANGE SELECTION OR GEAR CHANGE
STEPACTIONYESNO
1Was “AUTOMATIC TRANSMISSION DIAGNOSTIC
FLOW TABLE” performed?Go to Step 2.Go to “AUTOMATIC
TRANSMISSION
DIAGNOSTIC FLOW
TABLE”.
2Is line pressure proper?Go to Step 3.Regulator valve
defective, Throttle
valve defective or
Accelerator cable
maladjusted.
3Does excessive shock occur when selecting “D” range
from “N” range?Forward clutch
accumulator
operation failure,
Forward clutch worn
or Forward clutch oil
circuit check ball
operation failure. Go to Step 4.
4Does excessive shock occur when selecting “R” range
from “N” range?1st-Reverse brake
worn, 1st-Reverse
brake oil circuit check
ball operation failure.Go to Step 5.
5Does excessive shock occur at 1st to 2nd gear
change?2nd brake
accumulator
defective, 2nd brake
worn, 2nd brake oil
circuit check ball
operation failure.In case of excessive
shock at 2nd to 3rd
gear change, Direct
clutch worn or Direct
clutch oil circuit check
ball operation failure.

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. Front drive shaft (LH)
2. Oil pan
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-33
LINE PRESSURE TEST
This test is to check oil pressure system for operation by measuring
oil pressure in oil pressure line. Make sure to perform this test only
when transmission fluid is at normal operating temperature.
NOTE:

Make sure that transmission fluid level is between FULL HOT
and LOW HOT marks on oil level gauge at normal operating
temperature which corresponds to 70–80C (155–176F) of
fluid. (Refer to “Fluid level” in this section.)

Check that transmission is free from fluid leakage.
1) With engine at stop, remove plug and connect oil pressure
gauge to plug hole.
Special Tool
(A): 09925-37811-001
2) Install tachometer.
3) Apply parking brake and block vehicle wheels.
4) With selector lever shifted to P range, start engine.
5) Depress brake pedal fully.
6) Shift selector lever to D range and check oil pressure with engine
running at idling speed and at stall speed respectively.
7) Repeat the same check as in step 6) with selector lever shifted
to R range.
CAUTION:
Do not run engine at stall more than 5 seconds continu-
ously, for oil temperature may rise excessively high.
8) If line pressure is within respective specification in table below,
oil pressure system is in good condition.
[G10 Engine Model]
Engine speedLine pressureEngine s eedD rangeR range
Idling speed
200 – 390 kPa
2.0 – 3.9 kg / cm2
28.4 – 55.5 psi
540 – 780 kPa
5.4 – 7.8 kg / cm2
76.8 – 110.9 psi
Stall speed
390 – 590 kPa
3.9 – 5.9 kg / cm2
55.5 – 83.9 psi
880 – 1230 kPa
8.8 – 12.3 kg / cm2
125.1 – 174.9 psi
[G13 Engine Model]
Engine speedLine pressureEngine s eedD rangeR range
Idling speed
260 – 460 kPa
2.6 – 4.6 kg / cm2
37.0 – 65.4 psi
660 – 900 kPa
6.6 – 9.0 kg / cm2
93.9 – 128.0 psi
Stall speed
660 – 850 kPa
6.6 – 8.5 kg / cm2
93.9 – 120.9 psi
1330 kPa or more
13.3 kg / cm2 or more
189.0 psi or more

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)

WITHOUT BATTERY VOLTAGE
WITH BATTERY VOLTAGE
1. Oiler (with transmission fluid)
2. Solenoid valve
3. 12V battery
“A”: Side hole (Should be dry)
“B”: Exhausting fluid
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-37
“P” RANGE TEST
1) Stop vehicle on a slope, shift selector lever to P range and at the
same time apply parking brake.
2) After stopping engine, release parking brake lever gradually and
check that vehicle remains stationary.
SHIFT SOLENOID VALVE CHECK
Whenever shift solenoid valves are removed from transmission,
verify their valve function physically before they are reinstalled.
1) Apply oiler to solenoid valve and give compression by hands
and then check to be sure that transmission fluid from oiler does
not come out from side holes of solenoid valve when battery volt-
age is not conducted.
2) Holding the above condition, conduct battery voltage and then
make sure that fluid is exhausted with vigor.
NOTE:
If fluid does not come out with vigor in above step 2) inspec-
tion, do not reuse that solenoid valve.

1. Output shaft speed sensor
1. PCM coupler disconnected
7B-40 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
Separately from the above inspection, output shaft speed sensor
itself can be checked on its resistance by disconnecting coupler.
NOTE:

Function of output shaft speed sensor can be checked by
measuring generated pulse as voltage.

For its measurement, use an analog type voltmeter while
spinning wheels on lift and with selector lever in “D” range.
Output shaft speed sensor specifications
Coil resistance100 – 300 Ω
Output voltage at 40 km / h
(25 mile / h)Approximately 1 V
SHIFT SOLENOID VALVE CIRCUIT CHECK
1) With ignition switch turned OFF, disconnect PCM couplers.
2) Bring ohmmeter probes in touch with coupler terminals from har-
ness side and measure each resistance.
Resistance between C02-9 and C02-1
for G10 engine model (C03-4 and
C01-1 for G13 engine model)
(Shift solenoid-A, direct clutch) : 8 – 20 Ω
Resistance between C02-8 and C02-1
for G10 engine model (C03-11 and
C01-1 for G13 engine model)
(Shift solenoid-B, 2nd brake) : 8 – 20 Ω
If resistance is out of specification, check shift solenoid itself for
resistance (referring to Step 3 of DTC P0753 / P0756 Flow Table)
and wire harness for open or short.
If resistance is within specification, proceed to step 3).

1. Solenoid valve wire coupler
2. Terminal for shift solenoid-A. (direct clutch solenoid)
3. Terminal for shift solenoid-B. (2nd brake solenoid)
4. 12 V battery
5. Shift solenoid-B. (2nd brake solenoid valve)
6. Shift solenoid-A. (Direct clutch solenoid valve)
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-41
3) Disconnect shift solenoid valve coupler from harness.
4) Apply 12 V to each terminal in solenoid valve coupler and check
to be sure that a click sound is heard from each of shift sole-
noid-A and -B.
If no click sound is heard, check lead wire and connections in oil
pan, and then replace applicable shift solenoid-A or B if wire and
connections are in good condition.
If click sound is heard from each of shift solenoids A and B, shift
solenoid electrical circuits are in good condition. Proceed to
“SHIFT SOLENOID VALVE CHECK” previously described in
this section.
THROTTLE POSITION SENSOR CHECK
Check throttle position sensor and its circuit referring to DTC P0121
Flow Table in Section 6 or 6-1.