2000 SUZUKI SWIFT sensor pressure

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-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.

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

NOTE:
Terminal arrangement of coupler viewed from harness side.
Coupler A
1. To generator W / R
2. To ignition switch B / W
3. To ECM V / G
4. To ECM V
5. Blank –
6. To ECT sensor Y / W
7. Blank —
8. To engine oil pressure switch Y / B
9. To ECM Br
10. Blank —
11. To SDM (if equipped) Bl
12. Blank —
13. Blank —
14. Blank —
15. To ground R
16. To combination switch R / Y
Coupler B
1. To combination switch G / R
2. Blank —
3. Blank —
4. To ECM Y / G
5. To brake fluid level switch and R / B
parking brake switch
6. Blank —
7. To ABS control module R / Bl
(if equipped)
8. Blank —
9. To fuel level gauge Y / R
10. To ground B / Bl
11. To ignition switch B / W
12. Blank —
13. Blank —
Coupler C
1. Blank —
2. Blank —
3. Blank —
4. Blank —
5. Blank —
6. Blank —
7. To main fuse R
8. To combination switch W / Bl
9. To ground B
10. To combination switch G / Y
Coupler A Coupler B Coupler C
8-2 BODY ELECTRICAL SYSTEM
GENERAL DESCRIPTION
COMBINATION METER