2000 SUZUKI SWIFT engine

1. Countershaft gear
2. Output shaft speed sensor
A: Magnetic core end
D or 2
1→2
18
11
52
33D
2→3
33
21
97
613→2
14
9
82
51D or 2
2→1
14
9
37
23L
2→1
37
23
37
23 Full close
Full openkm / h
mile/h
km / h
mile/h Throttle SpeedGear Selector
VEHICLE SPEED
UpshiftDownshift
THROTTLE VALVE OPENING
[G10 Engine Model]
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-9
OUTPUT SHAFT SPEED SENSOR (A / T VSS)
The output shaft speed sensor consists of a magnetic core with
magnet and coil. It is mounted on transmission case with 0.6 mm
(0.024 in.) air gap between the core end and countershaft gear
tooth.
While the countershaft rotates, magnetic flux is cut by gear tooth
thus a pulse is generated in the sensor coil according to the speed.
And then, the pulse is transmitted to engine control module as
speed signal.
AUTOMATIC SHIFT DIAGRAM
Automatic shift schedule as a result of shift control is shown below. In case that 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, 2nd
gear is operated and then down shifts to 1st at a speed lower than that. No up shift is available in L range.

7B-10 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
D or 2
1→2
18
11
58
36D
2→3
30
19
11 0
693→2
14
9
97
61D or 2
2→1
14
9
40
25L
2→1
40
25
40
25 Full close
Full openkm / h
mile/h
km / h
mile/h Throttle SpeedGear Selector
VEHICLE SPEED
Upshift
Downshift
THROTTLE VALVE OPENING
[G13 Engine Model]

1. Malfunction indicator lamp (MIL)
2. Data link connector (DLC)
3. SUZUKI scan tool (Tech-1)
AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-11
DIAGNOSIS
This vehicle is equipped with an electronic transmission control system, which control the automatic shift up and
shift down timing, etc. suitably to vehicle driving conditions.
PCM (ECM) has an On-Board Diagnosis System which detects a malfunction in this system and abnormality of
those parts that influence the engine exhaust emission.
When diagnosing a trouble in transmission including this system, be sure to have full understanding of the outline
of “ON-BOARD DIAGNOSTIC SYSTEM” and each item in “PRECAUTION IN DIAGNOSING TROUBLE” and
execute diagnosis according to “AUTOMATIC TRANSMISSION DIAGNOSTIC FLOW TABLE” given below to ob-
tain correct result smoothly.
ON-BOARD DIAGNOSTIC SYSTEM
For automatic transmission control system, PCM (ECM) has follow-
ing functions. Refer to Section 6 or 6-1 for details.

When ignition switch is turned ON with engine at a stop malfunc-
tion indicator lamp (MIL) turns ON to check bulb of MIL.

When PCM detects a malfunction in A / T control system (and / or
a malfunction which gives an adverse effect to vehicle emission)
while engine is running, it makes malfunction indicator lamp in
meter cluster of instrument panel turn ON and stores malfunction
area (DTC) in its memory.
If it detects that continuously 3 driving cycles are normal after de-
tecting a malfunction, however, it makes MIL turn OFF although
DTC stored in its memory will remain.

It is possible to communicate with PCM through data link connect-
er (DLC) by using SUZUKI scan tool (Tech-1).
(Diagnostic information can be checked and erased by using a
scan tool)
2 Driving Cycle Detection Logic
Refer to Section 6 or 6-1 for details.
Freeze Frame Data
Refer to Section 6 or 6-1 for details.

7B-12 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
PRECAUTION IN DIAGNOSING TROUBLE

Don’t disconnect couplers from PCM, battery cable from battery, PMC ground wire harness from engine or main
fuse before checking the diagnosis information (DTC, freeze frame data, etc.) stored in PCM memory.
Such disconnection will clear memorized information in PCM.

Using SUZUKI scan tool (Tech-1) the diagnostic information stored in PCM memory can be checked and cleared
as well. Before its use, be sure to read Operator’s (instruction) Manual supplied with it carefully to have good
understanding of its functions and usage.

Priorities for diagnosing troubles
If two or more diagnostic trouble codes (DTCs) are stored, proceed to flow table (chart) of DTC which was de-
tected earliest in order and follow instruction in that table (chart).
If no instructions are given, troubleshoot diagnostic trouble codes according to the following priorities.
1. Diagnostic trouble codes (DTCs) other than DTC P0171 / P0172 (Fuel system too lean / too rich), DTC
P0300 / P0301 / P0302 / P0303 / P0304 (Misfire detected) and DTC P0400 (EGR flow malfunction)
2. DTC P0171 / P0172 (Fuel system too lean / too rich) and DTC P0400 (EGR flow malfunction)
3. DTC P0300 / P0301 / P0302 / P0303 / P0304 (Misfire detected)

Be sure to read “PRECAUTION FOR ELECTRICAL CIRCUIT SERVICE” in Section 0A before inspection and
observe what is written there.

PCM replacement
When substituting a known-good PCM, check for following conditions.
Neglecting this check may result in damage to good PCM.
–All relays and actuators have resistance of specified value.
–MAF sensor, TP sensor and fuel tank pressure sensor (if equipped) are in good condition. Also, the power cir-
cuit of these sensors is not shorted to the ground.

7B-14 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
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 (shown in next page) 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, referring to “DTC CHECK” in this section, check DTC (including pending DTC). If DTC exists, print or
write down DTC and freeze frame data and then clear them by referring to “DTC CLEARANCE” in this section.
DTC indicates malfunction in the system but it is not possible to know from it whether the malfunction is occur-
ring now or it occurred in the past and normal condition has been restored. In order to know that, check symp-
tom in question according to Step 5 and then recheck DTC according to Step 6.
Diagnosing a trouble based on the DTC in this step only or failure to clear the DTC in this step may result in
an faulty diagnosis, trouble diagnosis of a normal circuit or difficulty in troubleshooting which is otherwise un-
necessary.
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
and automatic transmission referring to “VISUAL INSPECTION” in this section.
5. TROUBLE SYMPTOM CONFIRMATION
Check trouble symptoms based on information obtained in Step 1 “Customer complaint analysis” and Step
2 “DTC / freeze frame data check”.
Also, reconfirm DTC according to “DTC CONFIRMATION PROCEDURE” described in each “DTC Flow Table”
in this section.
6. and 7. RECHECKING AND RECORD OF DTC / FREEZE FRAME DATA
Refer to “DTC CHECK” in this section for checking procedure.
8. AUTOMATIC TRANSMISSION BASIC CHECK AND SYMPTOM-TO-INSPECTION TABLE
Perform basic check of A / T according to “AUTOMATIC TRANSMISSION BASIC CHECK 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 “SYMPTOM -TO- INSPECTION TABLE” and based on symptoms appearing on the vehicle (symp-
toms obtained through steps of customer complaint analysis, trouble symptom confirmation and / or A / T basic
check) and repair or replace faulty parts, if any.
9. DIAGNOSTIC TROUBLE CODE FLOW TABLE
Based on the DTC indicated in Step 6 and 7, and referring to “DTC Flow Table” in this section, locate the cause
of the trouble, namely in a sensor, switch, wire harness, connector, actuator, 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 “IN-
TERMITTENT 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 vehicle 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
check to ensure that no DTC is indicated.

AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-15
CUSTOMER PROBLEM INSPECTION FORM (EXAMPLE)
User name:Model:VIN:
Date of issue:Date Reg.Date of problem:Mileage:
PROBLEM SYMPTOMS
Vehicle does not move (R, D, 2, L range)
No upshift automatically ( 1st to 2nd  2nd to 3rd  2 range  D range)
No downshift automatically ( 3rd to 2nd  2nd to 1st  2 range  D range)
No gear change manually ( 1st  2nd  2nd  3rd)
Automatic shift point too high or too low
Excessive gear change shock (1st / 2nd / 3rd / Reverse)
No kickdown
Transmission slipping in (1st / 2nd / 3rd / Reverse)
Others
VEHICLE / ENVIRONMENTAL CONDITION WHEN PROBLEM OCCURS
Environmental Condition
Weather
Temperature Fair  Cloudy  Rain  Snow  Always  Other
(F/C)  Hot  Warm  Cool  Cold  always
Frequency
y
 Always Sometimes ( times / day, month)  Only once  Under certain
condition
Road Urban  Suburb  Highway  Mountainous  Uphill  Downhill
 Tarmacadam  Grave  Other
Vehicle Condition
Engine &
transmission
 Cold / Warming up phase /  Warmed up
Engine speed ( r / min)transmission
condition
Engine s eed ( r / min)
Throttle opening ( Idle / About % / full)
Vehicle
condition
 At stop /  During driving ( Constant speed  Accelerating  Decelerating)
Right hand cornerLeft hand cornerVehicle speed ( km / h Mile / h)condition Right hand corner  Left hand corner  Vehicle s eed ( km / h Mile / h)
 Other
Malfunction Blink  Always ON  Sometimes ON  Always OFF
indicator lamp Good condition
DiagnosticFirst check:  No code  Malfunction code ( )
trouble codeSecond check:  No code  Malfunction code ( )
NOTE:
The above form is a standard sample. It should be modified according to conditions characteristic of each
market.

AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC) 7B-17
DIAGNOSTIC TROUBLE CODE (DTC) TABLE
DTC NO.DETECTING ITEMDETECTING CONDITION
(DTC will set when detecting:)MIL
P0705Transmission range sensorNo signal or multiple signals inputted with shifted in1 drivingP0705g
circuit malfunction
gg
“D” range.
g
cycle
P0720Output speed sensor
circuit malfunctionNo signal inputted while running vehicle with “D” or
“2” range.1 driving
cycle
P0751Shift solenoid-A
performance or stuck offWhile running in “D” range, engine speed as
compared to vehicle speed higher or lower than2 driving
P0756Shift solenoid-B
performance or stuck offcom ared to vehicle s eed higher or lower than
specified value
g
cycles
P0753Shift solenoid-A electricalOutput command from PCM and output voltage do not1 driving
P0758Shift solenoid-B electrical
g
agree. (Solenoid circuit shorted to ground or open)
g
cycle
FAIL-SAFE TABLE
DTC No.DETECTED ITEMFAIL-SAFE OPERATION
Transmission range sensor
(switch) circuit malfunctionNo signal
inputtedPCM controls solenoids on “L” range base.
P0705Multiple
signal
inputtedPCM controls solenoids according to following priority
order. L > R > D > 2 > N > P
P0720Output speed sensor (A / T
VSS) circuit malfunctionGear is held at 3rd gear when in “D” range and at 2nd gear when
in “2” range.
P0753Shift solenoid-A electricalWhen short circuit is detected, PCM
does not output ON command to shift Gear is held at 3rd gear
when in “D” range.
P0758Shift solenoid-B electrical
solenoid until vehicle stops and selector
lever is shifted to “P” or “N” range.Gear is not shifted to 1st
gear when in “D” range
or in “2” range.

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)