automatic transmission SUZUKI SWIFT 2000 1.G SF310 Service User Guide

ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-33
CANIST PURGE DUTY (EVAP CANISTER
PURGE FLOW DUTY, %)
This parameter indicates valve ON (valve open) time
rate within a certain set cycle of EVAP purge solenoid
valve which controls the amount of EVAP purge.
0% means that the purge valve is completely closed
while 100% is a fully open valve.
CLOSED THROTTLE POSITION (ON / OFF)
This parameter will read ON when throttle valve is ful-
ly closed, or OFF when the throttle is not fully closed.
FUEL CUT (ON / OFF)
ON : Fuel being cut (output signal to injector is
stopped)
OFF : Fuel not being cut
RAD FAN
(RADIATOR FAN CONTROL RELAY, ON / OFF)
ON : Command for radiator fan control relay opera-
tion being output.
OFF : Command for relay operation not being out-
put.
ELECTRIC LOAD (ON / OFF)
ON : Headlight, small light, heater fan or rear win-
dow defogger ON signal inputted.
OFF : Above electric loads all turned OFF.
A / C SWITCH (ON / OFF)
ON : Command for A / C operation being output
from ECM (PCM) to A / C amplifier.
OFF : Command for A / C operation not being output.
FUEL TANK LEVEL (%)
This parameter indicates approximate fuel level in the
fuel tank. As the detectable range of the fuel level sen-
sor is set as 0 to 100%, however, with some models
whose fuel tank capacity is smaller, the indicated fuel
level may be only 70% even when the fuel tank is full.
PSP SWITCH (ON / OFF)
ON : PSP switch detects P / S operation (high PS
pressure).
OFF : PSP switch not detects P / S operation.
BAROMETRIC PRESS (kPa, inHg)
This parameter represents a measurement of baro-
metric air pressure and is used for altitude correction
of the fuel injection quantity and ISC actuator control.
FUEL PUMP (ON / OFF)
ON is displayed when the ECM (or PCM) activates the
fuel pump via the fuel pump relay switch.
VSS (A / T) (km / h, MPH)
If is computed by using pulse signals from vehicle
(output) speed sensor on automatic transmission.
TRANS RANGE (TRANSMISSION RANGE
SENSOR, P, R, N, D, 2 OR L)
It is indicated transmission range detected by trans-
mission range sensor.
SHIFT SOL 1-CON (SHIFT SOLENOID-1,
ON / OFF)
ON : ON command being output to shift solenoid-1
OFF : ON command not being output.
SHIFT SOL 2-CON (SHIFT SOLENOID-2,
ON / OFF)
ON : ON command being output to shift solenoid-2
OFF : ON command not being output.
SHIFT SOL 1-MON (SHIFT SOLENOID-1,
ON / OFF)
The monitor result of the shift solenoid-1 circuit is dis-
played.
ON : Electricity being passed to shift solenoid-1 or
circuit open.
OFF : Electricity not being passed or circuit short.
SHIFT SOL 2-MON (SHIFT SOLENOID-2,
ON / OFF)
The monitor result of the shift solenoid-2 circuit is dis-
played.
ON : Electricity being passed to shift solenoid-2 or
circuit open.
OFF : Electricity not being passed or circuit short.
THROT POS LEVEL (THROTTLE POSITION
LEVEL FOR A / T, “0”, “1”, “2”, “3”, “4”, “5”, “6”
or “7”)
This parameter indicates which level (zone) the
throttle valve opening is in. The throttle opening is di-
vided into 8 levels (zones) from “0” (about idle posi-
tion) to “7” (about full open) and signals are assigned
to each opening level (zone). ECM (PCM) control the
automatic gear change of the automatic transmission
by using these signals according to the signal from
the TP sensor.
GEAR POSITION
This parameter indicates the A / T gear position which
is computed on signals from the Transmission Range
Switch, VSS, TP Sensor, and so forth.

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-11
1. CUSTOMER COMPLAINT ANALYSIS
Record details of the problem (failure, complaint) and how it occurred as described by the customer. For this
purpose, use of such an inspection form will facilitate collecting information to the point required for proper
analysis and diagnosis.
2. DIAGNOSTIC TROUBLE CODE (DTC) / FREEZE FRAME DATA CHECK, RECORD AND
CLEARANCE
First, check DTC (including pending DTC), referring to “DTC check” section. If DTC is indicated, print it and
freeze frame data or write them down and then clear them by referring to “DTC clearance” section. DTC indi-
cates malfunction that occurred in the system but does not indicate whether it exists now or it occurred in the
past and the normal condition has been restored now. To check which case applies, check the symptom in
question according to Step 4 and recheck DTC according to Step 5.
Attempt to diagnose a trouble based on DTC in this step only or failure to clear the DTC in this step will lead
to incorrect diagnosis, trouble diagnosis of a normal circuit or difficulty in troubleshooting.
NOTE:
If only Automatic transmission DTCs (P0705-P0758) or Immobilizer DTCs (P1610-P1614) are indicated
in this step, perform trouble diagnosis according to “Diagnosis” in Section 7B or Section 8G.
3. and 4. VISUAL INSPECTION
As a preliminary step, be sure to perform visual check of the items that support proper function of the engine
referring to “Visual Inspection” section.
5. TROUBLE SYMPTOM CONFIRMATION
Based on information obtained in Step 1 Customer complaint analysis and Step 2 DTC / freeze frame data
check, confirm trouble symptoms. Also, reconfirm DTC according to “DTC Confirmation Procedure” described
in each DTC Diagnosis section.
6. and 7. RECHECKING AND RECORD OF DTC / FREEZE FRAME DATA
Refer to “DTC check” section for checking procedure.
8. ENGINE BASIC INSPECTION AND ENGINE DIAGNOSIS TABLE
Perform basic engine check according to the “Engine Basic Inspection Flow Table” first. When the end of the
flow table has been reached, check the parts of the system suspected as a possible cause referring to SYMP-
TOMS-TO-DIAGNOSIS MATRIX TABLE and based on symptoms appearing on the vehicle (symptoms ob-
tained through steps of customer complaint analysis, trouble symptom confirmation and / or basic engine
check) and repair or replace faulty parts, if any.
9. TROUBLESHOOTING FOR DTC (See each DTC Diag. Flow Table)
Based on the DTC indicated in Step 5 and referring to the applicable DTC diag. flow table in this section, locate
the cause of the trouble, namely in a sensor, switch, wire harness, connector, actuator, ECM (PCM) or other
part and repair or replace faulty parts.
10. CHECK FOR INTERMITTENT PROBLEM
Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to
“INTERMITTENT AND POOR CONNECTION” in Section 0A and related circuit of DTC recorded in Step 2.
11. FINAL CONFIRMATION TEST
Confirm that the problem symptom has gone and the engine is free from any abnormal conditions. If what has
been repaired is related to the DTC, clear the DTC once, perform DTC confirmation procedure and confirm
that no DTC is indicated.

7B
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-1
GENERAL DESCRIPTION7B- 3 . . . . . . . . . . . . . .
Electronic Shift Control System 7B- 5. . . . . . . . .
DIAGNOSIS7B-11 . . . . . . . . . . . . . . . . . . . . . . . . . . .
On-board diagnostic system 7B-11. . . . . . . . . . .
Precaution in Diagnosing Trouble 7B-12. . . . . . .
Automatic Transmission Diagnostic
Flow Table 7B-13. . . . . . . . . . . . . . . . . . . . . . . . . .
Customer problem inspection form
(example) 7B-15. . . . . . . . . . . . . . . . . . . . . . . .
Malfunction indicator lamp (MIL)
check 7B-16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic trouble code(s) check 7B-16. . . . .
Diagnostic trouble code(s)
clearance 7B-16. . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic trouble code (DTC) table 7B-17. . .
Fail-safe table 7B-17. . . . . . . . . . . . . . . . . . . . . .
Visual inspection 7B-18. . . . . . . . . . . . . . . . . . .
Automatic Transmission Basic Check 7B-19. . .
Symptom-to-Inspection Table 7B-20. . . . . . . . . .
DTC P0705 Transmission Range
Sensor (Switch) Circuit Malfunction 7B-21. . . . DTC P0720 Output Speed Sensor
(A / T VSS) Circuit Malfunction 7B-24. . . . . . . . .
DTC P0753 Shift Solenoid-A (No.1)
Electrical 7B-26. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0758 Shift Solenoid-B (No.2)
Electrical 7B-26. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0751 Shift Solenoid-A (No.1)
Performance or Stuck Off 7B-28. . . . . . . . . . . . .
DTC P0756 Shift Solenoid-B (No.2)
Performance or Stuck Off 7B-28. . . . . . . . . . . . .
Table A-1 No Starting or Slipping in Any
Drive Range 7B-30. . . . . . . . . . . . . . . . . . . . . . . .
Table A-2 Gear Change Failure 7B-31. . . . . . . . .
Table A-3 Excessive Shock at Range
Selection or Gear Change 7B-31. . . . . . . . . . . .
Stall test 7B-32. . . . . . . . . . . . . . . . . . . . . . . . . . .
Line pressure test 7B-33. . . . . . . . . . . . . . . . . .
Road test 7B-35. . . . . . . . . . . . . . . . . . . . . . . . . .
Manual road test 7B-36. . . . . . . . . . . . . . . . . . .
Engine brake test 7B-36. . . . . . . . . . . . . . . . . . .
“P” range test 7B-37. . . . . . . . . . . . . . . . . . . . . .
Shift solenoid valve check 7B-37. . . . . . . . . . .
SECTION 7B
AUTOMATIC TRANSMISSION (3 A/T)
(VEHICLE WITH WU-TWC)
WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:

Service on and around the air bag system components or wiring must be performed only by an autho-
rized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under “Gener-
al Description” in air bag system section in order to confirm whether you are performing service on
or near the air bag system components or wiring. Please observe all WARNINGS and “Service Precau-
tions” under “On-Vehicle Service” in air bag system section before performing service on or around
the air bag system components or wiring. Failure to follow WARNINGS could result in unintentional
activation of the system or could render the system inoperative. Either of these two conditions may
result in severe injury.

Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system may
be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
NOTE:
For the descriptions (items) not found in this section, refer to the same section of the Service Manual men-
tioned in the FOREWORD of this manual.
CONTENTS

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.

7B-4 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
COMPONENTS OPERATION CHART
RangeGearForward
ClutchDirect
ClutchSecond
Brake1st & Reverse
BrakeOne-way
ClutchParking Lock
Pawl
PParking–––****–
RReverse––––
NNeutral––––––
1st––––
D2nd––––
3rd––––
21st––––22nd––––
L1st–––L*2nd––––
: Operated
*: To prevent over-revolution of engine, this 2nd gear is operated only when selector lever is shifted to L range
at a higher than 37 km / h (23 mile / h) (G10 engine model), 40 km / h (25 mile / h) (G13 engine model) speed.
**: When engine is running.

[G10 Engine Model]
1. PCM
2. Camshaft position (CMP) sensor
3. Throttle position (TP) sensor
4. Engine coolant temperature (ECT) sensor
5. Transmission range sensor (shift switch)
6. Output shaft speed sensor (A / T VSS)7. Malfunction indicator lamp (MIL)
8. Data link connector (DLC)
9. Shift solenoid-A
(No.1, Direct clutch solenoid valve)
10. Shift solenoid-B
(No.2, 2nd brake solenoid valve)11. Ignition switch
12. Main relay
13. Inhibitor switch
14. To starter
15. Terminal arrangement of PCM coupler
(Viewed from harness side)
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-5
ELECTRONIC SHIFT CONTROL SYSTEM

7B-6 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
[G13 Engine Model]
1. PCM
2. Camshaft position (CMP) sensor
3. Throttle position (TP) sensor
4. Engine coolant temperature (ECT) sensor
5. Transmission range sensor (shift switch)
6. Output shaft speed sensor (A / T VSS)7. Malfunction indicator lamp (MIL)
8. Data link connector (DLC)
9. Shift solenoid-A
(No.1, Direct clutch solenoid valve)
10. Shift solenoid-B
(No.2, 2nd brake solenoid valve)11. Ignition switch
12. Main relay
13. Inhibitor switch
14. To starter
15. Terminal arrangement of PCM coupler
(Viewed from harness side)

1. PCM
2. Instrument panel
TP sensor
Transmission range sensor
Output shaft speed sensor
(A / T VSS)
Shift solenoid-B
(2nd brake solenoid valve)
Shift solenoid-A
(Direct clutch solenoid valve)PCM
1. Throttle position sensor
2. Throttle body
A: Ground
3. Ground terminal
4. Reference voltage
terminal
5. Output voltage terminal
6. TP sensor
C: Output voltage
(opening angle signal)
D: Power supply from ECM
(reference voltage)
[G10 engine model]
[G13 engine model]
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-7
POWERTRAIN CONTROL MODULE (PCM)
The powertrain control module controls the shift solenoid B (2nd
brake solenoid valve) and the shift solenoid A (direct clutch sole-
noid valve) by sending electric signals to them so as to attain auto-
matic gear shift between the 1st and 2nd gears, and the 2nd and
3rd gears. Equipped as PCM sensed parameters are the throttle
position sensor, transmission range switch and vehicle speed sen-
sor. These switch and sensors sense the throttle valve opening, se-
lector lever’s position and vehicle speed, and send those signals to
the powertrain control module. Then, the powertrain control module
opens and closes valves of the above solenoids according to these
signals. The powertrain control module is installed to the underside
of the instrument panel at the driver’s seat side.
GEAR SHIFT CONTROL SYSTEM
THROTTLE POSITION SENSOR (TP sensor)
The throttle position sensor consisting of a potentiometer is con-
nected to the throttle valve shaft.
Throttle valve opening signal (output voltage) is transmitted from
throttle position sensor to PCM as voltage signal. PCM uses it as
one of the signals to control transmission gear shift.

1. Transmission range sensor
2. Select cable
1. Transmission
2. Shift solenoid-B
(No.2, 2nd brake solenoid valve)
3. Shift solenoid-A
(No.1, direct clutch solenoid valve)
4. Oil strainer
7B-8 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
TRANSMISSION RANGE SENSOR (SHIFT SWITCH)
Being linked with the selector lever, this sensor changes selector
lever positions into electric signals and send them to the engine
control module. The contact points of this sensor for P and N ranges
are also connected with the starting motor circuit.
So when the selector lever is shifted to the P or N range position,
the contact points for P or N range are connected and cause the
starting motor to operate by turning the starter switch ON.
When the selector lever is in any other position than P and N
ranges, the sensor remains OFF and therefore the starting motor
cannot be operated, that is, the engine cannot be started.
Also, as its contact point for R range is connected with the backup
lamp circuit, only when the selector lever is shifted to R range, the
contact point contacts to light the backup lamp.
DIRECT CLUTCH AND 2ND BRAKE SOLENOID
VALVES
These solenoid valves are mounted on the valve body. They are
turned ON and OFF by the signals from the engine control module
and actuate each shift valve (1 – 2 and 2 – 3 valves) so as to control
transmission gear shift.
Shift solenoid-B (2nd brake solenoid valve) operates 1 – 2 shift
valve, and shift solenoid-A (direct clutch solenoid valve) does 2 –
3 shift valve.
OPERATION OF DIRECT CLUTCH AND 2ND BRAKE SOLENOIDS
RangeD2LP, N & R
Gear1st2nd3rd1st2nd1st(2nd)–
Shift solenoid-A (No.1)
(Direct clutch solenoid valve)





Shift solenoid-B (No.2)
(2nd brake solenoid valve)





: Operated (Solenoid Valve is Open)
: Unoperated (Solenoid Valve is Closed)