2008 SUZUKI SWIFT check engine

Downloaded from www.Manualslib.com manuals search engine Automatic Transmission/Transaxle: 5A-79
2Check TCC solenoid valve circuit for IG short
1) Connect valve body harness connector.
2) Disconnect TCM connectors.
3) Check for proper connection to TCM at terminal “C34-3”
and “C34-5”.
4) If connection is OK, turn ignition switch ON and measure voltage between terminal “C34-3” of disconnected
harness side TCM connector and ground between
terminal “C34-5” of disconnected harness side TCM
connector and ground.
Are voltage 1 V or less? Go to Step 3. “WHT/BLU” or “WHT/
BLK” circuit shorted to
power circuit.
3 Check TCC lock-up pressure control solenoid valve
resistance
1) Turn ignition switch OFF.
2) Disconnect valve body harness connector (1), (2) on
automatic transaxle.
3) Check for proper connection to solenoid at “WHT/BLU” and “WHT/BLK” circuits.
4) Check resistance of TCC lock-up pressure control
solenoid valve.
TCC lock-up pressure control solenoid valve
resistance
Between terminals of transaxle side valve body
harness connector: 5.0 – 5.6 Ω at 20 °C (68 °F)
Between terminals of transaxle side valve body
harness connector and transaxle: Infinity
Is check results satisfactory? Intermittent trouble or
faulty TCM.
Check for intermittent
trouble referring to
“Intermittent and Poor
Connection Inspection
in Section 00”.
If OK, substitute a
known-good TCM and
recheck.
Replace TCC lock-up
pressure control
solenoid valve or lead
wire.
Step Action Yes No
1
6
7
89
10 5
43 2
1
2
I4RS0A510020-01

Downloaded from www.Manualslib.com manuals search engine 5A-80 Automatic Transmission/Transaxle:
DTC P2764: Torque Converter Clutch Circuit Pressure Control Solenoid Control Circuit LowS7RS0B5104044
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
WARNING!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 persons, a driver and a tester, on a level road.

1) Connect scan tool to DLC with ig nition switch OFF, if available.
2) Clear DTC in TCM memory.
3) Start engine.
4) Keep engine running at idle speed in “P” range for 20 seconds or more.
5) Check DTC.
DTC Troubleshooting
1. TCM 3. A/T
2. TCC pressure control solenoid valve [A]: Terminal arrangement of TCM connector (viewed from harness side)
DTC detecting condition Trouble area
Voltage of TCC lock-up pressure control solenoid valve TCM
terminal is low although TCM is commanding TCC lock-up
pressure control sole noid to turn ON. • TCC lock-up pressure contro
l solenoid valve circuit
shorted to ground
• Malfunction of TCC lock-up pressure control solenoid valve
•TCM
12V
C34-5
C34-3
WHT/BLU
WHT/BLK
3
1
2
53
C34C35
[A]
I4RS0A510019-01
Step
Action YesNo
1 Was “A/T System Check” performed? Go to Step 2.Go to “A/T System
Check”.

Downloaded from www.Manualslib.com manuals search engine Automatic Transmission/Transaxle: 5A-81
2Check TCC lock-up pressure control solenoid valve
resistance
1) Turn ignition switch OFF.
2) Disconnect valve body harness connector (1), (2) on
automatic transaxle.
3) Check for proper connection to solenoid at “WHT/BLU” and “WHT/BLK” circuits.
4) Check resistance of TCC lock-up pressure control
solenoid valve.
TCC lock-up pressure control solenoid valve
resistance
Between shift terminals of transaxle side valve body
harness connector: 5.0 – 5.6 Ω at 20 °C (68 °F)
Between shift terminals of transaxle side valve body
harness connector and transaxle: Infinity
Is check results satisfactory? Go to Step 3. Replace TCC lock-up
pressure control
solenoid valve or lead
wire.
3 Check TCC lock-up pressure control solenoid valve
circuit for ground short
1) Disconnect TCM connectors.
2) Check for proper connection to TCM at terminals “C34-
3” and “C34-5”.
3) If connection is OK, check continuity between terminal
“C34-5” of disconnected harness side TCM connector
and ground, between terminal “C34-3” of disconnected
harness side TCM connector and ground.
Are continuity indicated? “WHT/BLU” or “WHT/
BLK” circuit shorted to
ground.
Intermittent trouble or
faulty TCM.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
If OK, substitute a
known-good TCM and
recheck.
Step Action Yes No
1
6
7
89
10 5
43 2
1
2
I4RS0A510020-01

Downloaded from www.Manualslib.com manuals search engine 5A-82 Automatic Transmission/Transaxle:
Inspection of TCM and Its CircuitsS7RS0B5104045
TCM and its circuits can be checked at TCM wiring connec tors by measuring voltage, pulse signal and resistance.
CAUTION!
TCM cannot be checked by itself, it is strictly prohibited to connect voltmeter or ohmmeter to TCM with
connector disconnected from it.

1) Remove TCM (1) from vehicle referring to “Transmission Control Module (TCM) Removal and Installation”.
2) Connect TCM connectors (2) to TCM.
3) Check voltage and/or pulse signal at each terminal of connectors connected using voltmeter (3) and oscilloscope
(4).
NOTE
• As each terminal voltage is affected by battery voltag e, confirm that it is 11 V or more when ignition
switch is ON.
• Voltage with asterisk(*) cannot be measured by voltmeter because it is pulse signal. Check it with oscilloscope if necessary.

Terminal arrangement of TCM coupler (Viewed from harness side)
5. Body ground
3
5 4
12
I6RS0C510009-01
65
16 15 14 13 12 11 43
24 23 2122 10 9 8 721
1920 18 17
C34
17 16
26 25
15 14
65 3
42
13 12
23 2224 11 10 9
21 20 19 87
18
1
C35
I4RS0A510022-01

Downloaded from www.Manualslib.com manuals search engine 5A-86 Automatic Transmission/Transaxle:
Reference waveform No. 5
Output shaft speed sensor signal at vehicle speed 60
km/h (37 mile/h).
TCM Power and Ground Circuit CheckS7RS0B5104046
Wiring DiagramMeasurement
terminal
CH1: “C35-25” to “C34-1”
Oscilloscope
setting CH1: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Drive vehicle at 60 km/h (37 mile/h).
I3RM0B510028-01
BLK
BLK
BLK
C34-1
C34-23
C34-6YEL/BLKYEL/BLU
LT GRN/BLK
+BB
C34-24WHT/RED1
23
6
24 23 1
C34C35
[A]
I4RS0A510023-01
1. TCM
3. Ignition switch
2. A/T relay [A]: Terminal arrangement of TCM connector (viewed from harness side)

Downloaded from www.Manualslib.com manuals search engine Automatic Transmission/Transaxle: 5A-87
Troubleshooting
Brake Interlock System InspectionS7RS0B5104047
1) Check that select lever cannot be moved to any other range from “P” range position when ignition
switch key is at ACC position, at LOCK position or it
is removed from keyhole of ignition switch, or brake
pedal is not depressed. 2) Shift select lever to “P” range position, release knob
button and check for the following.
• Ignition key can be turned between LOCK and ACC positions back and forth and also it can be
removed from ignition switch.
Step Action Yes No
1 Check TCM back-up power circuit
1) Disconnect TCM connector with ignition switch OFF.
2) Check for proper connection to TCM at “C34-24”
terminal.
3) If OK, check voltage at terminal “C34-24” of disconnected TCM connector.
Is it 10 – 14 V? Go to Step 2. “WHT/RED” circuit open
or shorted to ground.
2 Check TCM power circuit
1) Disconnect TCM connector with ignition switch OFF.
2) Check for proper connection to TCM at “C34-6” terminal.
3) If OK, turn ignition switch ON and check voltage at
terminal “C34-6” of disconnected TCM connector.
Is it 10 – 14 V? Go to Step 4. Go to Step 3.
3 Check A/T relay operation
1) Check A/T relay operation referring to “A/T Relay
Inspection”.
Is check result satisfactory? “YEL/BLK”, “YEL/BLU”,
“LT GRN/BLK” or “BLK”
circuit for power supply
open.
Replace A/T relay.
4 Check TCM ground circuit
1) Turn ignition switch OFF.
2) With TCM connectors disconnected, check for proper
connection to TCM at “C34-1” / “C34-23” terminal.
3) If OK, check resistance between “C34-1” / “C34-23” terminal of disconnected TCM connector and body
ground.
Is continuity indicated? TCM power and ground
circuits are in good
condition.
“BLK” circuit for TCM
ground open.
I4RS0A510047-01
I4RS0A510048-01

Downloaded from www.Manualslib.com manuals search engine 5A-88 Automatic Transmission/Transaxle:
• With ignition switch turned to ACC position, push
shift lock solenoid release button (1). Then, select
lever can be shifted from “P” range position to any
other range.
• While ignition switch is at LOCK position, even when shift lock solenoid release button (1) is
pressed, select lever cannot be shifted from P
range position to any other range.
• When ignition switch is turned ON and brake pedal is depressed, select lever can be shifted
from “P” range position to any other range. 3) With select lever shifted to any position other than
“P” range, check that ignition key cannot be turned
LOCK position and it cannot be removed from
ignition switch unless it is at LOCK position.
Repair Instructions
Learning Control InitializationS7RS0B5106001
1) Connect san tool to DLC (1) with ignition switch OFF.
Special tool
(A): SUZUKI scan tool
2) Start engine and shift select lever to “P” range.
3) Select “Misc Test” mode on scan tool.
4) Perform “AT learned initialize” on scan tool.
1
I6RS0C510010-01
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I4RS0A510051-01
1
(A)I4RS0B510004-01

Downloaded from www.Manualslib.com manuals search engine Automatic Transmission/Transaxle: 5A-89
A/T Fluid Level CheckS7RS0B5106002
CAUTION!
Do not use any fluid other than the specified
ATF. Use of any fluid other than the specified
ATF may cause juddering or some other
faulty condition to occur.

Level Check at Normal Operating (Hot) Temperature
– Hot Check1) Drive vehicle so that A/T fluid temperature reach the
normal operating temperature (70 – 80 °C (158 –
176 °F)).
2) Stop vehicle with engine running and place it level.
3) With select lever at “P” range, apply parking brake and place chocks against wheels.
4) Keep engine idling and shift selector slowly to “L” and back to “P” position.
5) With engine idling, pull out fluid level gauge, wipe it off with a clean cloth and put it back into place.
6) Pull out fluid level gauge (1) again and check fluid level indicated on it. The lo west fluid level should be
between FULL HOT (2) and LOW HOT (3). If it is
below LOW HOT, add SUZUKI ATF 3317 or Mobil
ATF 3309 up to FULL HOT.
Automatic transaxle fluid
SUZUKI ATF 3317 or Mobil ATF 3309
NOTE
• Do not race engine while checking fluid level, even after the engine start.
• Do not overfill. Overfilling can cause foaming and loss of fluid through breather.
Then slippage and transaxle failure can
result.
• Bringing the level from LOW HOT to FULL HOT requires 0.4 liters (0.85 / 0.70 US/Imp.
pt).
• If vehicle was driven under high load such as pulling a trailer, fluid level should be
checked about half an hour after it is
stopped.

Level Check at Room (Cold) Temperature – Cold
Check
Fluid level can be checked temporarily at room (cold)
temperature which correspond to 20 – 30 °C (68 – 86
° F). This level check is considered to be preparation
before performing level check under normal operating
(hot) temperature. Checking procedure itself is the same
as that described in “Level Check at Normal Operating
(Hot) Temperature – Hot Check: ”. If fluid level is
between “FULL COLD” (4) and “LOW COLD” (5),
proceed to test drive. And when fluid temperature has
reached normal operating temp erature, check fluid level
again and adjust it as necessary.
CAUTION!
Fluid level check at room (cold) temperature
is recommended only for preparation of level
check under normal (hot) operating
condition.
Failure to perform fluid level check under
normal (hot) operating temperature may
result in damage to transaxle.

4. “FULL COLD” mark 5. “LOW COLD” mark
1. Fluid level gauge 2. “FULL HOT” mark 3. “LOW HOT” mark
I3RM0B510032-01
I3RM0B510032-01