2008 SUZUKI SWIFT battery voltage

Downloaded from www.Manualslib.com manuals search engine 5A-100 Automatic Transmission/Transaxle:
Operation Check
Shift solenoid valve-A (No.1) and -B (No.2)
CAUTION!
• Do not insert air gun against strainer installed on inlet of solenoid valve too
deeply, when blowing air into solenoid
valve. If not, the strainer will be damaged.
• Be very careful as dust etc. does not enter when solenoid valves are inspected.

• Check that solenoid valve (1) actuate with click sound when battery voltage is conducted.
• When solenoid valve (1) is connected to battery (2), confirm that solenoid valve is close condition by
blowing air (50 – 200 kPa, 0.5 – 2.0 kg/cm
2, 7 – 28.5
psi) into solenoid valve as shown in figure.
• When solenoid valve (1) is not connected to battery (2), confirm that solenoid valve is open condition by
blowing air (50 – 200 kPa, 0.5 – 2.0 kg/cm
2, 7 – 28.5
psi) into solenoid valve as shown in figure.
NOTE
Do not fail to inspect with air to prevent
mistaken checking because return spring for
valve is not installe d into solenoid valve.

Timing solenoid valve
CAUTION!
• Do not insert air gun against strainer
installed on inlet of solenoid valve too
deeply, when blowing air into solenoid
valve. If not, the strainer will be damaged.
• Be very careful as dust etc. does not enter when solenoid valves are inspected.

• Check that solenoid valve (1) actuate with click sound
when battery voltage is conducted.
• When timing solenoid valve (1 ) is connected to battery
(2), confirm that timing solenoid valve is open
condition by blowing air (50 – 200 kPa, 0.5 – 2.0 kg/
cm
2, 7 – 28.5 psi) into solenoid valve as shown in
figure.
• When timing solenoid valve (1) is not connected to battery (2), confirm that timi ng solenoid valve is close
condition by blowing air (50 – 200 kPa, 0.5 – 2.0 kg/
cm
2, 7 – 28.5 psi) into solenoid valve as shown in
figure.
NOTE
Do not fail to inspect with air to prevent
mistaken checking because return spring for
valve is not installed into solenoid valve.

I2RH0B510062-01I2RH0B510063-01

Downloaded from www.Manualslib.com manuals search engine 5A-102 Automatic Transmission/Transaxle:
Operation Check
Check pressure control solenoid valves (Pressure
control solenoid and TCC pressure control solenoid)
operation in the either manner of the following.
Using regulated DC power supply
1) Connect pressure contro l solenoid valve (1) with
regulated DC power supply (2) as shown in figure.
2) Turn regulated DC power supply switch ON and increase voltage of power supply keeping current
within 1.0 A.
3) Check for gradual movement of valve (3) in the direction of arrow “A” as voltage is increased.
4) Check movement of valve (3) in the direction of arrow “B” as voltage is decreased.
5) Turn power supply switch OFF.
CAUTION!
Do not pass current 1.0 A or more, or
pressure control solenoid is burned out.

Not using regulated DC power supply 1) Connect pressure control solenoid valve (1) to battery (2) setting 21 W bulb (4) on the way as
shown in figure.
2) Check for movement of valve (3) in the direction of arrow “A”.
3) Disconnect pressure control solenoid valve (1) from battery (2) and check movement of valve (3) in the
direction of arrow “B” as shown in figure.
CAUTION!
Set 21 W bulb on the way, or pressure control
solenoid valve is burned out.

Transmission Control Module (TCM) Removal
and Installation
S7RS0B5106026
CAUTION!
• TCM and ECM consists of highly precise
parts, therefore when handling it, be
careful not to expose to excessive shock.
• When replacing TCM with used one, all learned contents, which have been stored
in TCM memory by executing learning
control, should be initialized after
replacement.

Removal
1) Disconnect negative cable at battery.
2) If the vehicle is equipped with air bag system, disable air bag system. Refer to “Disabling Air Bag
System in Section 8B”.
3) Disconnect connectors from TCM (1).
4) Remove TCM by removing its bolts.
I2RH0B510064-01
I4RS0A510031-01
1
I4RS0B510007-01

Downloaded from www.Manualslib.com manuals search engine Power Assisted Steering System: 6C-11
Scan Tool DataS7RS0B6304006
NOTE
When P/S motor is cold condition (that is, armature coil of P/S motor is not heated), normal value with
asterisk (*) mark in the following table is displayed on scan tool.

) C1143 P/S motor circuit current too
high Measured motor drive current is
more than 50 A.
• P/S motor circuit
• P/S motor
• P/S control module1 driving
cycle
) C1145 P/S motor circuit current too
low Measured motor drive current is
less than 2 A continuously for
more than 3 seconds even though
target motor drive current is more
than 4 A.
or
Measured motor drive current is
less than 0.8 A for total 1 second
even though motor control duty is
more than 90% while target motor
drive current is less than 8 A. 1 driving
cycle
) C1153 P/S control module power
supply circuit Power supply voltage of P/S
control module is less than 9 V for
5 seconds continuously. • P/S control module power
supply circuit
• Undercharged Battery
• P/S control module 1 driving
cycle
) C1155 P/S control module internal
failure Internal memory (EEPROM) is
data error.
• P/S control moduleNot
applicable
Internal circuit is faulty.
or
Power supply voltage of P/S
control module exceeded 17.5 V. • Overcharged Battery
• P/S control module
1 driving
cycle
DTC No. Detecting item
Detecting condition
(DTC will set when detecting) Trouble area MIL
Scan tool data
Vehicle conditionNormal condition
) Battery Voltage
Ignition switch ON 10 – 14 V
) TQS Power Supply 10 – 14 V
) TQS Main Torque Engine running at idle speed Steering wheel at fully turned to left –9.4 – 0 N
⋅m
Steering wheel at free 0 N⋅m
Steering wheel at fully turned to right 0 – 9.4 N ⋅m
) TQS Sub Torque Engine running at idle speed Steering wheel at fully turned to left –9.4 – 0 N
⋅m
Steering wheel at free 0 N⋅m
Steering wheel at fully turned to right 0 – 9.4 N ⋅m
) Assist Torque Engine running at idle speed Steering wheel at fully turned to left –9.4 – 0 N
⋅m
Steering wheel at free 0 N⋅m
Steering wheel at fully turned to right 0 – 9.4 N ⋅m
) Motor Control Engine running at idle speed Steering wheel at free
0 A
Steering wheel at fully turned to left or right *35 – 45 A
) Motor Monitor Engine running at idle speed Steering wheel at free
0 A
Steering wheel at fully turned to left or right *35 – 45 A
) Vehicle Speed Engine running and vehicle at stop 0 km/h
) Engine Speed Engine running at idle speed after warming up 700 ± 50 rpm
) Motor Volt Engine running at idle speed Steering wheel at free
0.8 – 1 V
Steering wheel at fully turned to right About 5 V
) Ignition switch Ignition switch ON ON

Downloaded from www.Manualslib.com manuals search engine 6C-12 Power Assisted Steering System:
Scan Tool Data Definitions
Battery Voltage
This parameter indicates battery positive voltage.
TQS Power Supply (Torque Sensor Power Supply, V)
This parameter indicates the power supply voltage which
the P/S control module supplies to the torque sensor.
TQS Main Torque (Torque Sensor Main Torque, N ⋅m)
The torque sensor is installed to detect the steering force
and the steering directio n. It consists of two
potentiometers and the main torque sensor is one of
these.
TQS Sub Torque (Torque Sensor Sub Torque, N ⋅m)
The torque sensor is installed to detect the steering force
and the steering directio n. It consists of two
potentiometers and the sub-torque sensor is one of
these. Its output characteristics are compared with those
of the main torque sensor.
Assist Torque (N ⋅m)
This parameter is an internal parameter of the P/S
control module. It is obtained by computing the torque
sensor input signal. Motor Control (Motor Control Current, A)
Based on the input signal, the P/S control module
determines the assist amount
and controls the current to
the motor suitable for that a ssist amount. This parameter
indicates that control value.
Motor Monitor (Motor Monitor Current, A)
This parameter indicates the actually measured value of
the current flowing to the motor. The motor circuit
condition is diagnosed by co mparing this parameter with
“Motor Control” parameter described previously.
Vehicle Speed (km/h, MPH)
Vehicle speed signal is fed from BCM. P/S control
module determines the amount of power assist based on
this vehicle speed signal and the torque sensor signal.
Engine Speed (rpm)
Engine speed signal is fed from the ECM so that it can
be used for trouble diagnos is of the electric power
steering system.
Motor Volt (V)
This parameter indicates the voltage between motor
terminals.
Ignition switch (ON, OFF)
This parameter indicates the condition of the power
supply through the ignition switch.
Visual InspectionS7RS0B6304007
Visually check the following pats and system.
P/S System Symptom DiagnosisS7RS0B6304008
This section describes trouble diagnosis of the P/S system parts whose trouble is not indicated by the on-board
diagnostic system (self-diagnostic functi on). When no malfunction is indicated by the on-board diagnostic system
(self-diagnosis function) and those stee ring basic parts as described in “Steering Symptom Diagnosis in Section 6A”
are all in good condition, check the following power steer ing system parts which may be a possible cause for each
symptom of the steering. Inspection Item Referring section
Battery Level, leakage, color “Batte ry Description in Section 1J”
Connectors of electric wire
harness Disconnection friction “Intermittent and Poor
Connection Inspection in Section 00”
Fuses Burning “Cautions in Body Electric al System Servicing in Section 9A”
Parts Installation, damage
Other parts that can be checked visually
Condition Possible cause Correction / Reference Item
Steering wheel feels
heavy (Perform “Steering
Force Check” before
diagnosis.) Steering wheel installed improperly
(twisted)
Install steering wheel correctly.
Poor performance of torque sensor Check torque sensor referring to “Torque
Sensor and Its Circuit Inspection”.
Poor performance of P/S motor Check motor referring to “P/S Motor and Its
Circuit Inspection”.
Steering gear case assembly faulty Replace.
Poor performance of vehicle speed
signal from ECM Check vehicle speed signal circuit referring to
“DTC C1121 / C1123 / C1124: VSS Circuit
Failure”.

Downloaded from www.Manualslib.com manuals search engine 6C-32 Power Assisted Steering System:
DTC C1153: P/S Control Module Power Supply Circuit Voltage LowS7RS0B6304020
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
MBLK
REDE51-1
E51-2
12V
5
[A ]
12 3
4 5 67
89
11
10
12 13
141516
17 18 19 20
[B ]
1
2
LT GRN
/BLKE52-1 E49-1
GRNGRNWHTBLK
WHY
6
3
4
4
4
4
1 2
E49-2BLK
I7RS0B630011-01
[A]: Connector “E52” (viewed from harness side)
2. Ignition switch5. P/S control module
[B]: Connector “E49” (viewed from harness side) 3. Junction block assembly 6. Individual circuit fuse box No.1
1. Main fuse box 4. Fuse
DTC detecting condition Trouble area
Power supply voltage of P/S control module is less than 9
V for 5 seconds continuously
(1 driving cycle detection logic) • P/S control module power supply circuit
• Undercharged Battery
• P/S control module
Step
Action YesNo
1 Was “EPS System Check” performed? Go to Step 2.Go to “EPS System
Check”.
2 Battery voltage check
1) Check circuit fuse for P/S control module.
2) If OK, measure voltage between positive battery terminal
and vehicle body ground with engine running.
Is voltage 10 V or more? Go to Step 3.
Check charging system
referring to “Generator
Test (Undercharged
Battery Check) in
Section 1J”.
3 P/S control module power supply circuit check
1) Check power supply circuit and ground circuit for P/S
control module referring to “P/S Control Module Power
Supply and Ground Circuit Check”.
Is check result in good condition? Substitute a known-
good P/S control
module and recheck.
Repair defective circuit.

Downloaded from www.Manualslib.com manuals search engine Power Assisted Steering System: 6C-33
DTC C1155: P/S Control Module FailureS7RS0B6304021
Wiring Diagram
Refer to “DTC C1153: P/S Control Module Power Supply Circuit Voltage Low”.
DTC Detecting Condition and Trouble Area
DTC Troubleshooting DTC detecting condition Trouble area
Internal memory (EEPROM) is data error.
(In this case, MIL does not light up)
or
Internal circuit is faulty.
or
Power supply voltage of P/S control module exceeded
17.5 V.
(1 driving cycle detection logic) • Overcharged Battery
• P/S control module
Step
Action YesNo
1 Was “EPS System Check” performed? Go to Step 2.Go to “EPS System
Check”.
2 P/S control module power supply and ground circuit
check
Check power supply circuit and ground circuit for P/S control
module referring to “P/S Control Module Power Supply and
Ground Circuit Check”.
Is check result in good condition? Go to Step 3.
Repair or replace
defective circuit.
3 Battery voltage check
1) Check voltage between positive (+) battery terminal and
vehicle body ground with engine speed at 3000 rpm.
Is voltage 15.5 V or less? Replace P/S control
module.
Check charging system
referring to “Generator
Test (Overcharged
Battery Check) in
Section 1J”.

Downloaded from www.Manualslib.com manuals search engine 6C-36 Power Assisted Steering System:
Voltage Check1) Remove console box.
2) Check for voltage at each terminal with co nnectors connected to the P/S control module.
NOTE
As each terminal voltage is affected by the battery voltage, confirm if the battery voltage is 11 V or
more when ignition switch is ON.
*: The voltage of this circuit may not be checked by voltmeter. If so, use oscilloscope.

Terminal Wire colorCircuit Normal voltage Remarks
E49-1 GRN Main power supply for
internal memory and P/S
motor 10 – 14 V
—
E49-2 BLK Ground for P/S control
module Below 0.3 V
—
E51-1 BLK Motor output 1 *0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.1: ”, “Reference
waveform No.2:
”and “Reference
waveform No.3: ”) • Engine idling and steering wheel at
straight position
• Voltage between “E51-1” and vehicle body ground
E51-2 RED Motor output 2 *0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.1: ”, “Reference
waveform No.2: ” and “Reference
waveform No.3: ”) • Engine idling and steering wheel at
straight position
• Voltage between “E51-2” and vehicle body ground
E52-1 LT GRN/BLK Ignition switch signal for P/S
control module 10 – 14 V Ignition switch ON
E52-2 — —— —
E52-3 — —— —
E52-4 PPL Vehicle speed signal *0 – 1 V
↑↓
8 – 14 V
(“Reference
waveform No.9”
under “Inspection of
ECM and Its Circuits in Section 1A”.) • Ignition switch ON
•Front left tire tu
rned quickly with right
tire locked
E52-5 GRY “EPS” warning light 0 V “EPS” warning light OFF
E52-6 BLU Torque sensor signal (Sub) About 0 – 2.5 V
• Steering wheel with left turn
• Out put voltage varies linearly
depending on steering force
About 2.5 V Steering wheel at free
About 2.5 – 6 V • Steering wheel with right turn
• Out put voltage varies linearly
depending on steering force
E52-7 — —— —
E52-8 GRN Main power supply for torque
sensor About 12 V• Ignition switch ON
• Check voltage between “E52-8” and
“E52-9” terminals
E52-9 BRN Ground for torque sensors Below 0.3 V —
E52-10 — —— —

Downloaded from www.Manualslib.com manuals search engine 6C-46 Power Assisted Steering System:
P/S Control Module Removal and InstallationS7RS0B6306011
Removal1) Disconnect negative cable at battery.
2) Remove console box.
3) Disconnect connectors (1) from P/S control module (2).
4) Disconnect connector from yaw rate / G sensor
(ESP ® model).
5) Remove P/S control module (2) with bracket (3) from floor panel.
6) Separate P/S control module and bracket.
Installation
Reverse removal procedure for installation noting the
following.
• Tighten each screw to the specified torque. Tightening torque
P/S control module bracket screw (ABS model)
(a): 9 N·m (0.9 kgf-m, 6.5 lb-ft)
P/S control module bracket screw (ESP ® model)
(a): 7 N·m (0.7 kgf-m, 5.0 lb-ft)
P/S control module mounting screw (b): 5 N·m (
0.5 kgf-m, 3.7 lb-ft)
Torque Sensor and Its Circuit InspectionS7RS0B6306012
1) Remove console box.
2) With ignition switch turned OFF, connect scan tool to DLC or connect voltage tester between “E52-18” –
“E52-9” (main sensor) or “E52-6” – “E52-9” (sub
sensor) with connected connector (1) to P/S control
module. 3) Set torque wrench to stee
ring wheel referring to
“Steering Force Check” for checking steering force.
4) Turn ON ignition switch without engine running and select scan tool “Data list” mode due to check of
“TQS Main Torque”, “TQS Sub Torque” and “Assist
Torque” display on scan tool when steering wheel
turned left and right (if used).
5) Check that characteristic of torque sensor (main and sub) output voltage or scan tool data and steering
force is as following graph when steering wheel is
turned left and right. If sensor voltage or scan tool
data is out of specified value or does not vary linearly
as the following graph, check P/S control module
and its circuit.
If they are OK, replace steering gear case assembly.
1
(a)
2
3
(b)
I7RS0A630020-01
[A]: Steering force at left turn
[B]: Steering force at right turn
[C]: Steering wheel at free
[D]: “TQS Main Torque”, “TQS Sub Torque” and “Assist Torque” in “Data List” displayed on scan tool
E52
18
9
6
9
6 18
1
I6RS0C630024-01
I3RM0A630022-01
0
[C] [N.m]
MAX MAX
[B]
[A]
2.33 - 2.68 [V]
[D]
0.65 - 0.72
(0 - 0.4)
4.21 - 4.41
(5.1 - 5.6)
6.86
-6.86
0
6.86
- 6.86
I6RS0C630021-04