brake sensor SUZUKI SWIFT 2008 2.G Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 4F-4 Electronic Stability Program:
• 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.
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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”.
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N
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N
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N
N
S
N
S
12V
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3
1
5
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6I7RS0B460003-01
3245
1
I6RS0B460001-01

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Warning Lamp, Indicator Lamp DescriptionS7RS0B4601003
There are five types of warning lamp and indicator lamp in instrument cluster, which are controlled by ESP ® control
module. They give warning / indication to driver by changing the modes light ON / blinking / light OFF.
The followings are the condition and operation of warning lamps and indicator lamps.
CAN Communication System DescriptionS7RS0B4601004
Refer to “CAN Communication System Description in Section 1A” for CAN communication system description. ESP ®
control module communicates control data with each control module as follows.
ESP ® Control Module Transmission Data
1
245
3
I6RS0B460002-01
1. ESP ® warning lamp 3. ABS warning lamp 5. ESP ® OFF lamp
2. EBD warning lamp (brake warning lamp) 4. SLIP indicator lamp
Warning lamp / Indicator lamp Condition and operation
ABS warning lamp If ABS has abnor mality, the lamp turns “ON”.
EBD warning lamp (brake warning
lamp) • If EBD system has abnormality, the lamp turns “ON”.
• If bake fluid level in reservoir is lower
than minimum level, the lamp turns “ON”.
• Parking brake switch is ON, the lamp turns “ON”.
ESP ® warning lamp If ESP ® systems has abnormality, the lamp turns “ON”.
SLIP indicator lamp • If stability cont rol system and traction control system is active, the lamp blinks
at 5 Hz.
• If Steering angle sensor calibration is incompleted, the lamp blinks at 1 Hz.
ESP ® OFF lamp • If ESP ® OFF switch is turned “ON”, the ESP ® OFF lamp light up. When it is
“ON”, TCS and stability control system functions are controlled not to work.
• ESP® OFF lamp light up to indicate th at brake control of traction control
function is controlled not to act if brake pad temperature is over 320 °C (608 °F)
and any of wheel is in wheel spin condition.
Combination
meter
Transmit DATA
ESP® control
moduleECMSteering angle sensor
Torque request signal
Wheel speed signal (front right)
Wheel speed signal (front left)
ESP® status signal
ABS active signal
ABS indication signal
EBD indication signal
Steering angle neutral position
I7RS0B460004-01

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ESP® Control Module Reception Data
CAN Communication System For Electronic Stability Program DescriptionS7RS0B4601005
There is CAN communication system only for ESP ® control module (1) and yaw rate / G sensor assembly (2).
This CAN communication system is independent from other control modules.
ESP ® communicates control data with yaw rate / G sensor assembly as follows.
ESP ® Transmission Data to Yaw Rate / G Sensor Assembly
• Longitudinal G neutral position
• Lateral G neutral position
ESP ® Reception Data from Yaw Rate / G Sensor Assembly
• Vehicle yaw rate signal
• Vehicle longitudinal G signal
• Vehicle lateral G signal
• Yaw rate / G sensor assembly related malfunction
BCM
Receive DATA
ESP® control
moduleECMSteering angle sensor
Engine torque signal
Accelerator pedal position signal
Engine speed signal
Brake pedal switch signal
Brake fluid level switch signal
Parking brake switch signal
Steering angle signal
Steering angle sensor related malfunction
I7RS0B460005-01
2 1
I6JB01460006-01

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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

Downloaded from www.Manualslib.com manuals search engine 4F-10 Electronic Stability Program:
Terminal Arrangement of ESP® Control Module Connector (Viewed from Terminal Side)
7. Combination meter 20. Brake fluid level switch 33. Pump motor driver (transistor)
8. SLIP indicator lamp 21. Parking brake switch 34. Pump motor
9. ESP ® OFF lamp 22. Yaw rate / G sensor assembly 35. Solenoid valve power supply driver
(transistor)
10. ESP ® warning lamp 23. Left-front wheel speed sensor 36. Solenoid valve
11. ABS warning lamp 24. Right-front wheel speed sensor37. Solenoid valve driver (transistor)
12. EBD warning lamp (brake warning lamp) 25. Left-rear wheel speed sensor 38. Master cylinder pressure sensor
13. Lamp driver module 26. Right-rear wheel speed sensor 39. To ECM and P/S control module
Terminal CircuitTerminal Circuit
E85-1 Solenoid valve power supply driver
(transistor) E85-25CAN communication line (low) for yaw
rate / G sensor assembly
E85-2 Right-front wheel speed sensor (–) E85-26—
E85-3 Right-front wheel speed sensor (+) E85-27—
E85-4 —E85-28 —
E85-5 Left-rear wheel speed sensor (+) E85-29CAN communication line (high) for yaw
rate / G sensor assembly
E85-6 Left-rear wheel speed sensor (–) E85-30—
E85-7 ESP® OFF switch input E85-31 Ground for yaw rate / G sensor assembly
E85-8 —E85-32 Pump motor driver (transistor)
E85-9 —E85-33 Data link connector
E85-10 —E85-34 —
E85-11 Right-rear wheel speed sensor (–) E85-35 Ignition switch
E85-12 Right-rear wheel speed sensor (+) E85-36—
E85-13 CAN communication line (high) E85-37Power source for ya
w rate / G sensor
assembly
E85-14 Left-front wheel speed sensor (+) E85-38—
E85-15 Left-front wheel speed sensor (–) E85-39—
E85-16 Ground E85-40—
E85-17 —E85-41 —
E85-18 —E85-42 CAN communication line (high) for ECM
E85-19 —E85-43 —
E85-20 — CAN communication line (low)
E85-21 —E85-45 —
E85-22 —E85-46 CAN communication line (low) for ECM
E85-23 —E85-47 Ground
E85-24 —
E85
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I6RS0B460007-01

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Component Location
Electronic Stability Program Component LocationS7RS0B4603001
10
9
8
11
1415
13 1613
12 1 7
6
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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

Downloaded from www.Manualslib.com manuals search engine 4F-14 Electronic Stability Program:
Step 2: Driving Test
Test the vehicle at 40 km/h for more than a minute including left and right turns and check if any trouble symptom
(such as ESP ® warning lamp and/or ABS warning lamp) exists.
If the malfunction DTC is confirmed at ignition switch ON, proceed to Step 3.
If the malfunction DTC is not confirmed at ignition switch ON, proceed to Step 6.
Step 3: DTC Check
Recheck DTC referring to “DTC Check”.
Step 4: ESP ® Check
According to ESP ® Check for the DTC confirmation in Step 3, locate the cause of the trouble, namely in a sensor,
switch, wire harness, connector, actuator assembly or other part and repair or replace faulty parts.
Step 5: Brakes Diagnosis
Check the parts or system suspected as a possible cause referring to “Brakes Symptom Diagnosis in Section 4A” and
based on symptoms appearing on the vehicle (symptom obtain ed through Steps 1 and 2 and repair or replace faulty
parts, if any).
Step 6: Intermittent Problem Check
Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to
“Intermittent and Poor Connection Inspection in Section 00” and related circuit of trouble code recorded in Step 1 to 3.
Step 7: Final Confirmation Test
Confirm that the problem symptom has gone and the ESP ® is free from any abnormal conditions. If what has been
repaired is related to the malfunction DTC, clear the DTC once referrin g to “DTC Clearance” and perform test driving
and confirm that no DTC is indicated.
ESP ® Warning lamp CheckS7RS0B4604022
1) Turn ignition switch ON.
2) Check that ESP ® warning lamp (1) comes ON for
about 2 seconds and then goes off.
If any faulty condition is found, advance to “ESP ®
Warning Lamp Does Not Come ON at Ignition Switch
ON” or “ESP ® Warning Lamp Comes ON Steady”.
ABS Warning Lamp CheckS7RS0B4604046
1) Turn ignition switch ON.
2) Check that ABS warning lamp (1) comes ON for
about 2 seconds and then goes off.
If any faulty condition is found, advance to “ABS
Warning Lamp Does Not Come ON at Ignition Switch
ON” or “ABS Warning Lamp Comes ON Steady”.
1
I6RS0B460009-01
11
I4RS0A450007-01

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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 {

Downloaded from www.Manualslib.com manuals search engine 4F-20 Electronic Stability Program:
NOTE
•{: Activated
• X: Deactivated
• *1: If two or more wheel speed sensor are defective, ABS warning lamp, EBD warning lamp and ESP ® warning lamp are lit and all the control functions are deactivated. If one wheel speed sensor is
defective, ABS warning lamp and ESP ® warning lamp are lit and ABS and TCS / stability control are
deactivated.
• *2: ESP ® OFF mode is cancelled and all control functions are activated.
• *3: EBD control function is activated only if po wer supply circuit is little low voltage malfunction.

Scan Tool DataS7RS0B4604024
The parameter data below are values measured with the scan tool when the normally operating vehicle is under the
following conditions. When taking measurements for comparis on by using the scan tool, be sure to check that the
vehicle is under the following conditions.
• Apply parking brake and block wheels.
• Ignition switch ON.
• Turn OFF air conditioning (if equipped).
• Set the wheel in straight-ahead position and hands off steering wheel.
• Turn OFF all electric loads (except ignition).
• Check that there is no DTC.
Scan Tool Data Definition
Battery Volt (V): Battery Voltage is an analog input
signal read by the ESP ® control module. Certain
ESP ® control module functions will be modified if the
battery voltage falls below or rises above
programmed thresholds.
Pump Motor Driver (V): This parameter indicates the
operational condition of the pump motor driver
(transistor).
RF Wheel Speed, LF Wheel Speed, RR Wheel Speed and LR Wheel Speed (km/h, MPH): Wheel speed
is ESP ® control module internal parameter. It is
computed by reference puls es from the wheel speed
sensor. Brake Switch (ON, OFF):
This switch signal informs
the ESP ® control module whether the brake is active
or not.
Master Cyl Press (MPa): Brake fluid pressure from
brake master cylinder.
G Sensor (lateral) (G): Lateral acceleration is
measured by yaw rate / G sensor assembly and
output to ESP ® control module by pulse signal.
Yaw rate sensor (Deg/s): Yaw rate sensor is measured
by yaw rate / G sensor assembly and output to
ESP® control module by pulse signal.
Steering angle Sen ( °): Steering wheel rotation angle
is measured by steering angle sensor and output to
ESP® control module by pulse signal.
Scan Tool Data Standards Condition
Battery Voltage 10.0 – 16.0 V —
Pump Motor Driver 0.0 V —
RF Wheel Speed 0 km/h, 0.0 MPH Veh icle is in stationary condition.
LF Wheel Speed 0 km/h, 0.0 MPH Veh icle is in stationary condition.
RR Wheel Speed 0 km/h, 0.0 MPH Vehic le is in stationary condition.
LR Wheel Speed 0 km/h, 0.0 MPH Veh icle is in stationary condition.
Brake Switch ON Brake pedal is depressed
OFF Brake pedal is released
Master Cyl Press 0 ± 0.8 MPa Brake pedal is released
G Sensor (lateral) 0 ± 0.1 G Vehicle is on the level
Yaw rate sensor 0 ± 4 deg/s Vehicle is on the level
Steering angle Sen 0 ± 3 ° Front wheels are in straight-ahead
position
Stability control INACTIVE Stability control system is not working
TCS control (brake) INACTIVE Brake function by TCS is not working
TCS control (engine) INACTIVE Torque control by TCS is not working
ESP ® off state (cont) ESP®
ON ESP
® OF
F switch is OFF condition
ESP® OFF ESP ® OFF switch is ON condition
Steering angle Sen Neutral Front wheels are in straight-ahead
position