2000 SUZUKI SWIFT Position sensor

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 . . . . . . . . . . . . . . . . . . . . . .

[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-19
Fig. 1 for Step 5. Fig. 2 for Step 5. Fig. 3 for Step 5.
When not using SUZUKI
scan tool:
lever position
Terminal
Selector
AUTOMATIC TRANSMISSION BASIC CHECK
This check is very important for troubleshooting when PCM (ECM) has detected no DTC and no abnormality has
been found in visual inspection. Follow the flow table carefully.
STEPACTIONYESNO
1Was “AUTOMATIC TRANSMISSION DIAG. FLOW TABLE”
performed?Go to Step 2.Go to
“AUTOMATIC
TRANSMISSION
DIAG. FLOW
TABLE”.
2Check A / T Fluid.
Warm transmission to normal operating temperature and check
fluid level and contamination referring to “FLUID LEVEL
CHECK” of “ON-VEHICLE SERVICE” in this section.
Is it in good condition?Go to Step 3.Add or change
fluid.
3Check Fluid Pressure Control Cable.
1) Warm up engine to normal operating temperature.
2) Check fluid pressure control cable for play referring to
“FLUID PRESSURE CONTROL CABLE” of “ON-VEHICLE
SERVICE” in this section.
Is it in good condition?Go to Step 4.Adjust.
4Check Select Cable for Adjustment referring to “SELECT
CABLE” of “ON-VEHICLE SERVICE” in this section.
Is it adjusted correctly?Go to Step 5.Adjust.
5Check Transmission Range Sensor (Switch) Circuit for
Operation.
When using SUZUKI scan tool:
1) Connect SUZUKI scan tool to DLC with ignition switch OFF.
2) Turn ignition switch ON and check transmission range
signal (P, R, N, D, 2 or L) on display when shifting manual
selector to each range. See Fig. 1.
Is applicable range indicated?
When not using SUZUKI scan tool:
1) Turn ignition switch ON.
2) Check voltage at terminals C03-3 C03-4 C03-5 C03-14
Go to Step 6.Go to Step 3 of
DTC P0705
Flow Table.
2) Check voltage at terminals C03-3, C03-4, C03-5, C03-14,
C03-15 and C03-16 for G10 engine model (C02-11, C02-12,
C02-14, C02-15, C02-21 and C02-23 for G13 engine
model) respectively with selector lever shifted to each
range. See Fig. 2.
Taking terminal C03-3 for G10 engine model (C02-11 for
G13 engine model) as an example, is battery voltage
indicated only when selector lever is shifted to “2” range and
0 V for other ranges as shown in Fig. 3?
Check voltage at other terminals likewise, referring to Fig. 3.
Are check results satisfactory?
6Check Engine Idle speed referring to Section 6E1 or 6E2.
Is it in good condition?Go to
“SYMPTOM-TO-
INSPECTION
TABLE” below.Go to Section
6E1 or 6E2.
C03-5
(C02-21)C03-16
(C02-15)C03-4
(C02-12)C03-15
(C02-14)C03-3
(C02-11)C03-14
(C02-23)
PB + V0 V0 V0 V0 V0 V
R0 VB + V0 V0 V0 V0 V
N0 V0 VB + V0 V0 V0 V
D0 V0 V0 VB + V0 V0 V
20 V0 V0 V0 VB + V0 V
L0 V0 V0 V0 V0 VB + V

7B-22 AUTOMATIC TRANSMISSION (3 A / T) (VEHICLE WITH WU-TWC)
Fig. 1 for Step 2. Fig. 2 for Step 2.
Fig. 3 for Step 2.
When not using SUZUKI
scan tool:
lever position
Terminal
Selector
TROUBLESHOOTING
STEPACTIONYESNO
1Was “AUTOMATIC TRANSMISSION DIAGNOSTIC FLOW
TABLE” performed?Go to Step 2.Go to
“AUTOMATIC
TRANSMISSION
DIAGNOSTIC
FLOW TABLE”.
2Check Transmission Range Sensor Circuit for Operation.
When using SUZUKI scan tool:
1) Connect SUZUKI scan tool to DLC with ignition switch OFF.
2) Turn ignition switch ON and check transmission range
signal (P, R, N, D, 2 or L) on display when shifting manual
selector to each range. See Fig. 1.
Is applicable range indicated?
When not using SUZUKI scan tool:
1) Turn ignition switch ON.
2) Check voltage at terminals C03-3, C03-4, C03-5, C03-14,
C03-15 and C03-16 for G10 engine model (C02-11, C02-12,
C02-14, C02-15, C02-21 and C02-23 for G13 engine model)
respectively with selector lever shifted to each range. See Fig. 2.
Taking terminal C03-3 for G10 engine model (C02-11 for G13
engine model) as an example, is battery voltage indicated only
when selector lever is shifted to “2” range and 0 V for other
ranges as shown in Fig. 3?
Check voltage at other terminals likewise, referring to Fig. 3.
Are check results satisfactory?Intermittent
trouble. Check
for intermittent
referring to
“INTERMITTENT
AND POOR
CONNECTION”
in Section 0A.Go to Step 3.
3Check Select Cable for Adjustment referring to “SELECT
CABLE” of “ON-VEHICLE SERVICE” in this section.
Is it adjusted correctly?Go to Step 4.Adjust.
4Check Transmission Range Sensor.
1) Remove TR sensor from A / T.
2) At each of P, R, N, D, 2 and L shift position, check continuity
between terminals as well as each terminal and sensor
case. See Fig. 4.
Continuity should be indicated only between those
terminals as shown in Fig. 4 and 5 at each shift position.
Continuity should not exist between any terminal and
sensor case.
Are check results satisfactory?Go to Step 5.Replace TR
sensor.
5Check Transmission Range Sensor for Installation Position.
1) Install TR sensor to transmission referring to
“TRANSMISSION RANGE SENSOR” of “ON-VEHICLE
SERVICE” in this section.
2) Perform check as described in step 2 of this table.
Is check result satisfactory?Transmission
range sensor
maladjusted.Check “Y”, “Or / B”,
“R”, “Or / Y”,
“Gr / R”, “Gr” or
“Gr / Bl” (G10
engine model)
(“Br / Y”, “W/B”,
“R/W”, “W/R”,
“Y/R”, “Y/B” or
“R/B” (G13 engine
model)) circuit for
open or short.
If wires and
connections are
OK, substitute a
known-good PCM
and recheck.
C03-5
(C02-21)C03-16
(C02-15)C03-4
(C02-12)C03-15
(C02-14)C03-3
(C02-11)C03-14
C02-23)
PB + V0 V0 V0 V0 V0 V
R0 VB + V0 V0 V0 V0 V
N0 V0 VB + V0 V0 V0 V
D0 V0 V0 VB + V0 V0 V
20 V0 V0 V0 VB + V0 V
L0 V0 V0 V0 V0 VB + V