brake sensor SUZUKI SWIFT 2000 1.G SF310 Service Owner's Manual

6B-4 ENGINE COOLING
COOLANT (WATER) TEMP. GAUGE
The coolant temp. gauge is included in engine coolant temp. (ECT)
sensor (1). This gauge activates a temp. meter in the instrument
cluster.
DIAGNOSIS
ConditionPossible CauseCorrection
Engine overheatsLoose or broken water pump belt
Not enough coolant
Faulty thermostat
Faulty water pump
Dirty or bent radiator fins
Coolant leakage on cooling system
Defective cooling fan motor
Plugged radiator
Faulty radiator cap
Maladjusted ignition timing
Dragging brakes
Slipping clutchAdjust or replace.
Check coolant level and add as
necessary.
Replace.
Replace.
Clean or remedy.
Repair.
Check and replace as
necessary.
Check and replace radiator as
necessary.
Replace.
Adjust.
Adjust brake.
Adjust or replace.

6E2-34 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
FUEL CUT OPERATION
Inspection
NOTE:
Before inspection, check to make sure that gear shift lever is
in neutral position (with A / T model, selector lever in “P”
range), A / C is OFF and that parking brake lever is pulled all the
way up.
1) Warm up engine to normal operating temperature.
2) While listening to sound of injector (1) by using sound scope (2)
or such, increase engine speed to higher than 3,000 r / min.
3) Check to make sure that sound to indicate operation of injector
stops when throttle valve is closed instantly and it is heard again
when engine speed is reduced to less than about 2,000 r / min.
RADIATOR FAN CONTROL SYSTEM
System Inspection
WARNING:
Keep hands, tools, and clothing away from engine cooling
fan to help prevent personal injury. This fan is electric and
can come on whether or not the engine is running. The fan
can start automatically in response to the ECT sensor with
the ignition switch in the ON position.
Check system for operation referring to Flow Table B-8 in Section
6.
If radiator fan fails to operate properly, check relay, radiator fan and
electrical circuit.
Radiator Fan
Inspection
1) Check continuity between each two terminals.
If there is no continuity, replace radiator fan motor.

IGNITION SYSTEM (SFI FOR G13) 6F1-7
5) Measure secondary coil for resistance.
Secondary coil resistance : 7.6 – 10.2 kΩ at 20C, 68F
If resistance is out of specification, replace ignition coil assem-
bly.
6) Install ignition coil assembly.
7) Tighten ignition coil bolts, and then connect ignition coil coupler.
8) Install high-tension cord to ignition coil assembly while gripping
its cap.
CRANKSHAFT POSITION SENSOR
(CKP SENSOR)
Refer to section 6E2 for removal, inspection and installation.
IGNITION TIMING
NOTE:

Ignition timing is not adjustable. If ignition timing is out of
specification, check system related parts.

Before starting engine, place transmission gear shift lever in
“Neutral” (shift selector lever to “P” range for A / T model),
and set parking brake.
INSPECTION
1) Connect SUZUKI scan tool to DLC with ignition switch OFF.
Special Tool
(A): 09931-76011 (SUZUKI scan tool)
(B): Mass storage cartridge
(C): 09931-76030 (16 / 14 pin DLC cable)
2) Start engine and warm it up to normal operating temperature.
3) Make sure that all of electrical loads except ignition are switched
off.
4) Check to be sure that idle speed is within specification.
(Refer to SECTION 6E2)

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

[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)

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:

Carry out the test in very little traffic area to prevent an ac-
cident.

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
Possible causes
No upshift from 1st
to 2nd
1 – 2 shift valve defective

2nd brake solenoid valve defective

PCM defective, or disconnection or
poor connection in electric circuit
No upshift from
2nd to 3rd
2-3 shift valve defective

Direct clutch solenoid valve defective

PCM defective, or disconnection or
poor connection in electric circuit
No downshift from
2nd to 1st or 3rd to
2nd
Throttle position sensor defective

PCM defective, or disconnection or
poor connection in electric circuit

7B-38 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
TABLE B-1 GEAR SHIFT FAILURE IN “D” OR “2” RANGE
STEPACTIONYESNO
1Was “TABLE A-2 GEAR CHANGE FAILURE” performed?Go to Step 2.Go to “TABLE
A-2”.
2Is gear no shift at all?Go to Step 3.Go to Step 4.
3Perform vehicle speed sensor check refer to “OUTPUT
SPEED SENSOR CHECK” in this section.
Is check result satisfactory?Go to Step 5.Repair or
replace.
4Perform throttle position sensor check referring to DTC P0121
Flow Table in Section 6-1.
Is check result satisfactory?Go to Step 5.Repair or
replace.
5Perform “SHIFT SOLENOID VALVE CIRCUIT CHECK”
described later in this section.
Is check result satisfactory?Substitute a
known-good
PCM and
recheck.Replace shift
solenoid-A
(direct clutch
solenoid) valve
or shift
solenoid-B (2nd
brake solenoid)
valve.
TABLE B-2 GEAR IS SHIFTED TO 2ND GEAR IN “L” RANGE
VEHICLE DOES NOT MOVE BACKWARD IN “R” RANGE
NOTE:
Gear shift to 2nd may occur when selector lever is shifted from D or 2 to L, but this is normal.
STEP
ACTIONYESNO
1Was “TABLE A-2 GEAR CHANGE FAILURE” performed?Go to Step 2.Go to “TABLE
A-2”.
2Perform “SHIFT SOLENOID VALVE CIRCUIT CHECK”
described later in this section.
Is check result satisfactory?Substitute a
known-good
PCM and
recheck.Replace shift
solenoid-A
(direct clutch
solenoid) valve
or shift
solenoid-B (2nd
brake solenoid)
valve.