2007 SUZUKI SWIFT Voltage

Downloaded from www.Manualslib.com manuals search engine 5A-64 Automatic Transmission/Transaxle:
DTC P0973 / P0976: Shift Solenoid “A” Control Circuit Low / Shift Solenoid “B” Control Circuit LowS7RS0B5104033
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 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 shift select lever to “D” range.
4) Start vehicle and increase vehicle speed until gear position reaches 3rd or 4th gear.
5) Decrease vehicle sp eed and stop vehicle.
6) Check DTC.
1. TCM 3. Shift solenoid valve-B (No.2) [A]: Terminal arr angement of TCM connector (Viewed from harness side)
2. Shift solenoid valve-A (No.1) 4. A/T
DTC detecting condition Trouble area
Voltage of shift solenoid valv e TCM terminal is low although
TCM is commanding shift solenoid to turn ON • Shift solenoid valve circuit shorted to ground
• Malfunction of shift solenoid valve
•TCM
12V
12VBRNC34-16
C34-15BLK/YEL
41
2
3
16 15
C34C35
[A]
I4RS0A510016-01

Downloaded from www.Manualslib.com manuals search engine 5A-66 Automatic Transmission/Transaxle:
DTC P0974 / P0977: Shift Solenoid “A” / Shift Solenoid “B” Control Circuit HighS7RS0B5104034
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 and shift select lever to “D” range.
4) Start vehicle and increase vehicle speed until gear position reaches 3rd or 4th gear.
5) Decrease vehicle sp eed and stop vehicle.
6) Check DTC.
1. TCM 3. Shift solenoid valve-B (No.2) [A]: Terminal arra ngement of TCM connector (viewed from harness side)
2. Shift solenoid valve-A (No.1) 4. A/T
DTC detecting condition Trouble area
Voltage of shift solenoid valve TCM terminal is high although
TCM is commanding shift solenoid to turn OFF • Shift solenoid valve circuit open or shorted to power
circuit
• Malfunction of shift solenoid valve
•TCM
12V
12VBRNC34-16
C34-15BLK/YEL
41
2
3
16 15
C34C35
[A]
I4RS0A510016-01

Downloaded from www.Manualslib.com manuals search engine Automatic Transmission/Transaxle: 5A-67
DTC TroubleshootingStep Action Yes No 1 Was “A/T System Check” performed? Go to Step 2. Go to “A/T System
Check”.
2 Check shift 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-
16” (for shift solenoid valve-A (No.1)) or “C34-15” (for
shift solenoid valve-B (No.2)).
4) If connection is OK, turn ignition switch ON and measure voltage between terminal “C34-16” (for shift solenoid
valve-A (No.1)) or “C34-15” (for shift solenoid valve-B
(No.2)) of disconnected harness side TCM connector
and ground.
Is it 0 – 2 V? Go to Step 3. DTC P0974: “BRN”
circuit shorted to power
circuit.
DTC P0977: “BLK/YEL”
circuit shorted to power
circuit.
3 Check shift 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 “BRN” (for shift solenoid valve-A (No.1)) or “BLK/YEL” (for shift
solenoid valve-B (No.2)) circuit.
Check resistance of solenoid valve.
Shift solenoid valve resistance
Between shift solenoid valve-A (No.1) terminal (3)
and transaxle: 11 – 15 Ω at 20 °C (68 °F)
Between shift solenoid valve-B (No.2) terminal (4)
and transaxle: 11 – 15 Ω at 20 °C (68 °F)
Is check results satisfactory? 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.
Replace applicable shift
solenoid valve or valve
body harness.
1
6
7
89
10 5
43 2
1
23
4
I3RM0B510022-01

Downloaded from www.Manualslib.com manuals search engine 5A-70 Automatic Transmission/Transaxle:
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by us ing scan tool and turn ignition switch ON.
3) Shift select lever to each of “L”, “2”, “3”, “D”, “N”, “R” and “P” ranges for 20 seconds each.
4) Check DTC, pending DTC and freeze-frame data.
DTC Troubleshooting DTC detecting condition Trouble area
“3” position switch ON signal is inputted although transmission range
switch signal is inputted P, R, N or L. range. • “3” position switch or its circuit malfunction
•BCM
•TCM
Step
Action YesNo
1 Was “A/T System Check” performed? Go to Step 2.Go to “A/T System
Check”.
2 “3” position switch circuit for operation
1) Connect SUZUKI scan tool to DLC with ignition switch
OFF.
2) Turn ignition switch ON and check “3” position switch signal on scan tool data display when shifting select
lever to each range.
Does indicate “3” position swit ch (O/D OFF switch) condition
OFF when shifting select lever to “P”, “R”, “N” and “L” range? Substitute a known-
good TCM and recheck.
Go to Step 3.
3 “3” position switch signal inspection
With ignition switch ON, check voltage between “L01-8”
terminal of BCM coupler and ground.
“3” position switch specifications
Shift select lever to “3” or “2” range: Battery voltage
Shift select lever to other above range: 0 V
Is the result as specified? Substitute a known-
good BCM and recheck.
Go to Step 4.
4 Check “3” position switch operation
Is it in good condition? “LT GRN” wire shorted
to ground.
Replace “3” position
switch.

Downloaded from www.Manualslib.com manuals search engine 5A-78 Automatic Transmission/Transaxle:
DTC P2763: Torque Converter Clutch Pressure Control Solenoid Control Circuit HighS7RS0B5104043
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 10 seconds or more.
5) Check DTC.
DTC Troubleshooting
1. TCM 3. A/T
2. TCC lock-up pressure control solenoid valve [A]: Terminal arrangement of TCM connector (viewed from harness side)
DTC detecting conditionTrouble area
Voltage of TCC lock-up pressure control solenoid valve TCM
terminal is high although TCM is commanding TCC lock-up
pressure control sole noid to turn OFF. • 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-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 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