Abs control unit SUZUKI SWIFT 2006 2.G Service Owner's Guide

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Specifications
Tightening Torque SpecificationsS7RS0B4507001
NOTE
The specified tightening torque is also described in the following.
“Front Wheel Speed Sensor Components Location”
“Rear Wheel Speed Sensor Components Location”
“ABS Hydraulic Unit / Control Module Assembly Components”

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fasteners Information in Section 0A”.
Special Tools and Equipment
Special ToolS7RS0B4508001
Fastening part Tightening torque
Note
N ⋅mkgf-mlb-ft
Brake pipe flare nut 16 1.6 11.5 )
ABS hydraulic unit / c ontrol module assembly
bolt 90.9 6.5)
ABS hydraulic unit / c ontrol module assembly
bracket bolt 25 2.5 18.0)
Front wheel speed sensor bolt 25 2.5 18.0 )
Front wheel speed sensor harness clamp bolt 11 1.1 8.0 )
Rear wheel speed sensor bolt 11 1.1 8.0 )
Rear wheel speed sensor har ness clamp bolt 11 1.1 8.0 )
09950–78220SUZUKI scan tool
Flare nut wrench (10 mm) —
) This kit includes following
items. 1. Tech 2, 2. PCMCIA
card, 3. DLC cable, 4. SAE
16/19 adapter, 5. Cigarette
cable, 6. DLC loop back
adapter, 7. Battery power
cable, 8. RS232 cable, 9.
RS232 adapter, 10. RS232
loop back connector, 11.
Storage case, 12. ) / )

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Perform sensor calibration according to “Sensor Calibration”.
Precautions in Speedometer Test or Other TestsS7RS0B4600005
When performing speedometer or other tests using speedometer tester or chassis dynamometer, ESP® function must
be deactivated by ESP ® OFF switch or using SUZUKI scan to ol to complete the tests correctly.
When using SUZUKI scan tool, set to the “MISC. TEST” mode to stop the ESP ® function. Refer to SUZUKI scan tool
operator's manual for further details.
General Description
Electronic Stability Program DescriptionS7RS0B4601006
Electronic Stability Program (ESP ®) is an auxiliary function to enable the vehicle to av oid a danger safely while the
vehicle is running, stopping or turning.
Electronic Stability Program (ESP ®) consists of following functions.
ESP ® is a registered trademark of Daimler Chrysler AG.
Antilock Brake System (ABS)
This system prevents tire locking which may occur when br ake is applied suddenly or on slippery roads. With this
function, as the vehicle body is kept in the stable state an d tires unlocked, the driver can avoid any obstacle by turning
the steering wheel.
Electronic Brake force Distribution (EBD)
This function distributes braking force of front and rear wheels properly according to the vehicle load condition.
With this function, the braking force of the front and rear wheels is controlled for the optimum effect to secure the
maximum braking force regardless of the loadage.
Traction Control System (TCS)
This system controls the engine and brake to prevent the dr iving wheels from spinning at the time of starting and
accelerating. Particularly, this fu nction is helpful for safe driving on muddy or icy roads. When ESP ® control module
detects wheel spinning using information from the yaw rate sensor and wheel speed sensor, it lower the engine torque
by closing the electronic controlled thro ttle and controlling ignition. At the same time, brake is applied to the spinning
tire.
Stability Control
This function controls the vehicle body in the stable state by controlling the engine and braking so as to prevent the
vehicle from over-steering or under-steering while turning.
When under-steering occurs, this function lowers the engine torque and applies brake to the inner rear wheel in the
vehicle forward direction so as to pr event the vehicle from moving outward.
When over-steering occurs, this function applies brake to the outer front wheel in the vehicle forward direction so as to
prevent the vehicle from moving inward. Sensor Procedures required calibration
Steering angle sensor • Power is not su pplied to steering angle sensor. (battery, fuse and/or connector is
removed.)
• Steering angle sensor is replaced.
• Power is not supplied to ESP ® control module. (battery, fuse and/or connector is
removed.)
• ESP® hydraulic unit / control module assembly is replaced.
Master cylinder pressure sensor • ESP® hydraulic unit / control module assembly is removed or replaced.
Yaw rate / G sensor assembly • Yaw rate / G sensor assembly is removed or replaced.
• ESP® hydraulic unit / control module assembly is replaced.

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• Pump motor:The pump motor turns on and applies pressure to each brake when braking is activated in the TCS and stability
control state. When in the pressure reduction mode, it causes the brake fluid in the reservoir to return to the master
cylinder.
• Brake master cylinder pressure sensor: This sensor detects the brake hydraulic pressure in th e primary piping when brake is applied in the normal
condition. Also, it detects the pump motor driving state wh en brake is applied in the TCS and Stability Control state.
• Inlet solenoid valve: In the ABS, TCS and Stability Control stat e, this valve is activated in the pressure keeping and pressure reduction
modes to open the fluid passage, thereby restricting increase of the hydraulic pressure applied to the brake caliper.
• Outlet solenoid valve: In the ABS, TCS and Stability Control state, this valve is activated in the pressure reduction mode to open the fluid
passage, thereby lowering the hydraulic pressure kept in the brake caliper.
• Cut solenoid valve: When brake is applied in the TCS and Stability Control state, this valve is activated to close the fluid passage,
thereby causing the hydraulic pressure generated by the pump motor to apply to the brake caliper.
• Low pressure solenoid valve: When brake is applied in the TCS and Stab ility Control state, this valve is activated to open the fluid passage from
the master cylinder to the pump motor.
Steering angle sensor
The steering angle sensor is assembled with the contact co il as a unit and mounted to the steering column. Detecting
the angle as the steering wheel is turned, it sends that information to the ESP ® control module.
1
10 10
11 11
6
7
12 12
8 8 88
9 9 9
9
43 5 2
I7RS0B460002-01
1. Master cylinder 5. Brake caliper (rear-left)9. Outlet solenoid valve
2. Brake caliper (front-right) 6. Pump motor10. Cut solenoid valve
3. Brake caliper (front-left) 7. Brake master cylinder pressure sensor 11. Low pressure solenoid valve
4. Brake caliper (rear-right) 8. Inlet solenoid valve

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Yaw rate / G sensor
The yaw rate / G sensor consists of the yaw rate (angular velocity in the vehicle turning direction) sensor and right-left
G (acceleration in right-left direction) sensor and is mounted to the P/S controller B/K at the lower part of the center
console. It detects the angular velocity in the vehicle turn ing direction and movement in the right-left direction, and
then it sends that information to ESP ® control module.
Wheel speed sensor
The vehicle speed is detected by the hall IC type wheel speed sensor (1) and encoder (4). The wheel speed sensor is
fixed to the knuckle and includes a hall IC (3) having 2 hall elements (2).
The encoder consisting of a permanent ma gnet which has S/N electrodes turns inside of the wheel hub along with the
wheel. The wheel speed sensor outputs alternate current.
As the cycle of the alternate current is in proportion to the revolution speed of the encoder, this AC signal (5) is
converted into the voltage signal in the ESP ® control module (6) for detection of the wheel speed.
ESP ® Hydraulic Unit / Control Module
Assembly Description
S7RS0B4601002
ESP ® control module is a component of ESP ® hydraulic
unit / control module assembly and has the following
functions.
Self-Diagnosis Function
ESP ® control module monitors each input and output
signals. When ESP ® control module detects any
malfunction, some of ABS warning lamp (1), EBD
warning lamp (brake warning lamp) (2), ESP ® warning
lamp (3), SLIP indicator lamp (4), ESP ® OFF lamp (5)
are turned ON and indicate the abnormality to driver.
• When ignition switch is turned ON, ABS warning lamp, EBD warning lamp, ESP ® warning lamp, SLIP
indicator lamp and ESP ® OFF lamp light for 2
seconds to check its circuit.
• When no abnormality is detected (the system is in good condition), ABS warning lamp, EBD warning
lamp, ESP ® warning lamp, SLIP indicator lamp and
ESP ® OFF lamp turn OFF after 2 seconds.
• When an abnormality in the system is detected, some of ABS warning lamp, EBD warning lamp (brake
warning lamp), ESP ® warning lamp, SLIP indicator
lamp and/or ESP ® OFF lamp are turned ON and the
area where that abnormality lies is stored in the
memory in ESP ® control module. Fail-Safe Mode
When ESP
® control module detects abnormality, the
system goes into fail-safe mode. And some of functions
of ABS, TCS, stability control system are shut down. For
details of fail safe mode, re fer to “Fail-Safe Table”.
S
N
S
N
S
N
N
S
N
S
12V
2
3
1
5
4
6I7RS0B460003-01
3245
1
I6RS0B460001-01

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Schematic and Routing Diagram
Electronic Stability Program SchematicS7RS0B4602001
INPUTOUTPUT
ESP® control module
Wheel speed sensor (LF)
Wheel speed sensor (LR)
Wheel speed sensor (RF) Battery VoltageMaster cylinder pressure sensor
Pump motor driver
(transistor)
Solenoid valve power
supply driver (transistor)
Solenoid valve driver
(transistor)
CAN driver
CAN driver (for yaw rate /
G sensor assembly) Hydraulic unit
Pump motor
LF inlet solenoid valve
LF outlet solenoid valve
LR inlet solenoid valve
LR outlet solenoid valve
RF inlet solenoid valve
RF outlet solenoid valve
RR inlet solenoid valve
RR outlet solenoid valve
Data link connector
Data link connector
ESP® hydraulic unit/control module assembly
Wheel speed sensor (RR)
Master cylinder cut solenoid valve No. 1
Master cylinder cut solenoid
valve No. 2
Low pressure solenoid valve No. 1
Low pressure solenoid valveNo. 2
Stop lamp switch
Engine torque
Accelerator pedal position
Engine speed ECM
Brake fluid level switch
Parking brake switch
BCM
Steering angle sensor
ESP® OFF switch
Yaw rate
Lateral G Yaw rate / G sensor assembly
ABS warning lamp
EBD warning lamp
ESP® warning lamp
SLIP indicator lamp
ESP® OFF lampCombination meter
Torque request
ECM
Steering angle neutral positionSteering angle sensor
Yaw rate / G sensor assembly
Lateral G neutral position
I7RS0B460006-01

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Component Location
Electronic Stability Program Component LocationS7RS0B4603001
10
9
8
11
1415
13 1613
12 1 7
6
5
4
3
2
I7RS0B460008-02
1. ABS fuse 7. Steering angle sensor13. Encoder
2. ESP ® warning lamp 8. ESP® hydraulic unit / control module 14. Yaw rate / G sensor
3. ESP ® OFF lamp 9. ABS motor fuse 15. Front wheel speed sensor
4. EBD warning lamp (brake warning lamp) 10. ABS solenoid fuse 16. ESP® OFF switch
5. ABS warning lamp 11. Stop lamp switch
6. SLIP indicator lamp 12. Rear wheel speed sensor

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EBD Warning Lamp (Brake Warning Lamp)
Check
S7RS0B4604047
NOTE
Perform this check on a level place.

1) Turn ignition switch ON with parking brake applied.
2) Check that EBD warning lamp (brake warning lamp)
(1) is turned ON.
3) Release parking brake with ignition switch ON and check that EBD warning lamp (brake warning lamp)
goes off.
If it doesn't go off, go to “EBD Warning Lamp (Brake
Warning Lamp) Comes ON Steady”.
DTC CheckS7RS0B4604004
1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector (1).
Special tool
(A): SUZUKI scan tool
3) Turn ignition switch to ON position.
4) Read DTC according to instructions displayed on
SUZUKI scan tool and print it or write it down. Refer
to SUZUKI scan tool operator’s manual for further
details.
NOTE
If SUZUKI scan tool can not communicate
ESP® control module, perform “Serial Data
Link Circuit Check”.

5) After completing the check, turn ignition switch off and disconnect SUZUKI scan tool from DLC.
DTC TableS7RS0B4604005
CAUTION!
Be sure to perform “Electronic Stability Program System Check” before starting diagnosis.

BRAKE
1
I4RS0A450008-01
(A)
1
I4RS0B450003-01
DTC (displayed
on SUZUKI scan tool) Diagnostic Items
Detecting condition (DTC will
beset when detecting) ABS
warning lamp EBD
warning lamp ESP
®
warning lamp
NO DTC Normal — — — —
) C1016 Stop lamp switch failure Vehicle behavior and stop lamp
switch signal is disagreed for
specified time.———
) C1017 Lateral G sensor range /
performance Lateral G sensor signal is out of
specified range.
——
{
) C1018 Brake fluid level switch
failure • Brake fluid level is too low.
• Input signal of brake fluid level
switch to BCM is low level. ——
{
) C1020 Master cylinder pressure
sensor power supply failure Power supply volt
age to master
cylinder pressure sensor in ESP ®
hydraulic unit / control module
assembly is out of specification. ——
{
) C1021 Right-front wheel speed
sensor circuit failure Wheel sensor signal is out of
specified range.
{
*1 {

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ABS Warning Lamp Does Not Come ON at Ignition Switch ONS7RS0B4604048
Wiring Diagram4
Check ESP ® control module power supply circuit
1) Turn ignition switch to OFF position.
2) Check for proper connection to ESP ® control module
connector at terminals “E85-1” and “E85-32”.
3) If OK, then turn ignition switch to ON position and measure voltage between each terminal of “E85-1”,
“E85-32” and vehicle body ground.
Are they 10 – 14 V? Go to Step 5. “WHT/BLU” and/or
“WHT/RED” circuit
open.
5 Check ESP ® control module ground circuit
1) Turn ignition switch to OFF and measure resistance between each terminal of “E85-16”, “E85-47” and vehicle
body ground.
Is resistance less than 2
Ω? Go to Step 6.
Ground circuit for ESP®
control module open or
high resistance.
6 CAN communication circuit check
1) Check CAN communication circuit between combination
meter and ESP ® control module referring to “DTC
U1073: Control Module Communication Bus Off”.
Is CAN communication circuit in good condition? Substitute a known-
good combination meter
and recheck. If warning
lamp remains ON,
substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Repair or replace.
Step
Action YesNo
[A]
E85
161
15
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
3233
34
35
36
37
38
39
40
41
42
43
44
45
46
47
WHTGRN
3
E85-13
E85-44REDWHT6 5E46-1E46-2
4 10
6
E85-16
E85-47BLKBLK
8
9
BLK/ORN
REDWHT
REDWHT
G37-4G37-2
G28-10G28-8
G28-16
12V
12VE85-32E85-1
E85-35
WHT/REDWHT/BLU
GRN/ORN
6
2
1
7 1112[B]
G37
E46124
53
67
891011121314124
53
67
891011
1213141516171819202122
[C] G28
12345678910111213141516
17181920212223242526272829303132
G28-31
RED/BLK
I6RS0B460010-01
[A]: ESP ® control module connector (viewed
from terminal side) 3. Ignition switch 8. ABS warning lamp
[B]: BCM connector (viewed from harness side) 4. Junction block assembly 9. Lamp driver module
[C]: Combination meter connector (viewed from harness side) 5. BCM (included in junction block
assembly) 10. ESP
® hydraulic unit / control module
assembly
1. Battery 6. CAN driver11. Junction connector
2. Main fuse box 7. Combination meter12. To steering angle sensor

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Circuit Description
Operation (ON/OFF) of ABS warning lamp is controlled by ESP® control module through lamp driver module in
combination meter.
If antilock brake system is in good condition, ESP ® control module turns ABS warning lamp ON at the ignition switch
ON, keeps it ON for 2 seconds and then turns it OFF. If an abnormality in the system is detected, ABS warning lamp is
turned ON continuously by ESP ® control module. Also, it is turned ON continuously by lamp driver module when the
connector of ESP ® control module is disconnected.
Troubleshooting
Refer to “Troubleshooting” under “ESP ® Warning Lamp Does Not Come ON at Ignition Switch ON”.
ABS Warning Lamp Comes ON SteadyS7RS0B4604049
Wiring Diagram
Refer to “Wiring Diagram” under “ABS Warning Lamp Does Not Come ON at Ignition Switch ON”.
Circuit Description
Refer to “Circuit Description” u nder “ABS Warning Lamp Does Not Co me ON at Ignition Switch ON”.
Troubleshooting
Refer to “Troubleshooting” under “ESP ® Warning Lamp Comes ON Steady”.
EBD Warning Lamp (Brake Warning Lamp) Comes ON SteadyS7RS0B4604050
Wiring Diagram
[A]
E85
161
15
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
3233
34
35
36
37
38
39
40
41
42
43
44
45
46
47WHTGRN
3
E85-13
E85-44REDWHT8 5E46-1E46-2
4
13
8
E85-16
E85-47BLKBLK
1110
12
BLK/ORN
REDWHT
REDWHT
G37-4G37-2
G28-10G28-8
G28-16
12V
12VE85-32E85-1
E85-35
WHT/REDWHT/BLU
GRN/ORN
8
2
1
9 1415
[B]
G37
E46
124
53
67
891011121314124
53
67
891011
1213141516171819202122
[C] G28
12345678910111213141516
17181920212223242526272829303132
12V
12V
6
7E46-5
L01-6
RED/BLK
RED/BLK
G28-31
RED/BLK
I6RS0B460011-01
[A]: ESP ® control module connector (viewed from terminal side) 4. Junction block assembly 10. EBD warning lamp (brake warning lamp)
[B]: BCM connector (viewed from harness side) 5. BCM (included in junction block
assembly) 11. ABS warning lamp
[C]: Combination meter connector (viewed from harness side) 6. Brake fluid level switch 12. Lamp driver module 1. Battery 7. Parking brake switch 13. ESP ® hydraulic unit / control module
assembly
2. Main fuse box 8. CAN driver 14. Junction connector
3. Ignition switch 9. Combination meter 15. To steering angle sensor

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Circuit Description
EBD warning lamp (brake warning lamp) is controlled by ESP® control module and BCM through lamp driver module
in combination meter.
If EBD system is in good condition, ESP ® control module turns EBD warning lamp ON at the ignition switch ON,
keeps it ON for 2 seconds and then turns it OFF.
EBD warning lamp is turned ON cont inuously at the following conditions.
• EBD system is an abnormality
• Connector of ESP ® control module is disconnected
• Parking brake switch is ON
• Brake fluid level is lower than minimum level
The information of parking brake switch and brake fluid leve l are transmitted from BCM to lamp driver module in
combination meter through CAN communication line.
Troubleshooting
Step Action Yes No 1 Check parking brake and brake fluid level
1) Make sure that:
• Parking brake is completely released.
• Brake fluid level is upper than the minimum level.
Are the check results OK? Go to Step 2. Release parking brake
completely and/or
replenish brake fluid.
2 Check ABS warning lamp
1) Turn ignition switch to ON position.
Does ABS warning lamp come on steady? Perform “ABS Warning
Lamp Does Not Come
ON at Ignition Switch
ON” previously outlined.Go to Step 3.
3 Check parking brake switch circuit and brake fluid level
switch circuit
1) Release parking brake completely, and replenish brake
fluid.
2) Disconnect BCM connectors with ignition switch turned OFF.
3) Measure resistance between each terminal of “L01-6”, “E46-5” and vehicle body ground.
Are resistance
∞ Ω? Go to Step 4. Check each applicable
circuit for short to
vehicle body ground. If
OK, then check parking
brake switch and/or
brake fluid level switch.
4 CAN communication circuit check
1) CAN communication circuit between combination meter,
ABS (ESP® ) control module and BCM referring to “DTC
U1073: Control Module Communication Bus Off”.
Is CAN communication circuit in good condition? Substitute a known-
good combination meter
and recheck. If EBD
warning lamp remains
ON, substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Repair or replace.