2008 SUZUKI SWIFT Brake system

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DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC C1017 / C1023: Yaw Rate / G Sensor Assembly FailureS7RS0B4604025
DTC C1017: Lateral G Sensor Range / Performance
DTC C1023: Yaw Rate Sensor Failure
DTC Detecting Condition and Trouble AreaDTC Detecting Condition Trouble Area
Vehicle behavior and stop lamp switch signal is disagreed
for specified time. • Back up light switch circuit
• Back up light switch
•ECM
• ESP
® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 DTC check for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP ®.
Is DTC U1073 and/or U1100 detected? Go to applicable diag.
flow.
Go to Step 3.
3 Check stop lamp switch circuit
1) Check stop lamp, stop lamp (brake pedal) switch and
their circuit referring to “Brake Light Symptom Diagnosis
in Section 9B”.
Are they in good condition? Go to Step 4.
Repair or replace.
4 Check ECM circuit for stop lamp switch
1) Disconnect connectors from ECM.
2) Check for proper connection to “E23-20” wire of ECM
connector.
3) If connections are OK, check stop lamp switch circuit for
the following.
• Resistance of “GRN/WHT” wire terminal of stop lamp switch between stop lamp switch connector and ECM
connector is less than 1 Ω (continuity check)
• Resistance between “GRN/WHT” wire terminal of stop lamp switch connector and vehicle body ground is
infinity (ground short check)
• Voltage of between “GRN/WHT” wire terminal of stop switch connector and vehicle body ground is 0 V with
ignition switch tuned ON (power short check)
Are they in good condition? Substitute a known-
good ECM and recheck.
If DTC C1016 is still
detected, substitute a
known-good ESP
®
hydraulic unit / control
module assembly and
recheck. Repair or replace
defective wire.
DTC Detecting Condition
Trouble Area
C1017:
Lateral G sensor signal is out of specified range.
C1023:
• Yaw rate sensor signal is out of range.
• Vehicle behavior and yaw rate signal is disagreed. • Yaw rate / G sensor assembly
• ESP
® control module

Downloaded from www.Manualslib.com manuals search engine 4F-30 Electronic Stability Program:
DTC Troubleshooting
DTC C1018: Brake Fluid Level Switch FailureS7RS0B4604027
Wiring Diagram
DTC Detecting Condition and Trouble AreaStep Action Yes No
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2. Go to “Electronic
Stability Program
System Check”.
2 DTC check for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP ®.
Are DTC C1034 and/or C1073 detected? Go to applicable DTC
diag. flow.
Go to Step 3.
3 Check sensor calibration
1) Calibrate yaw rate / G sensor assembly referring to
“Sensor Calibration”.
2) Clear all DTCs and check DTC for ESP ®.
Are DTC C1017 and/or C1023 still detected? Go to Step 4. Yaw rate / G sensor
assembly calibration is
incompleted.
4 Check yaw rate / G sensor assembly
1) Check yaw rate / G sensor assembly referring to “Yaw
Rate / G Sensor Assembly On-Vehicle Inspection”.
Is it good condition? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Substitute a known-
good yaw rate / G
sensor assembly and
recheck.
[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 [B]
E46
124
53
67
891011121314
E85-13
E85-44REDWHT4E46-1E46-2
124
12V3E46-5RED/BLK
I6RS0B460015-01
[A]: ESP
® control module connector (viewed from terminal side) 1. BCM 3. Brake fluid level switch
[B]: BCM connector (viewed from harness side) 2. ESP ® hydraulic unit control module assembly 4. CAN driver
DTC Detecting Condition Trouble Area
• Brake fluid level is too low.
• Input signal of brake fluid level switch to BCM is low level. • Brake fluid level
• Brake fluid level switch circuit
• Brake fluid level switch
•BCM
• ESP
® control module

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DTC Troubleshooting
DTC 1020: Master Cylinder Pressure Sensor Power Supply FailureS7RS0B4604028
DTC Detecting Condition and Trouble Area
DTC Troubleshooting1) Turn ignition switch to OFF position.
2) Check for proper connection from harness to ESP ® control module.
3) If OK, substitute an ESP ® hydraulic unit / control module assembly with correct part number.
4) Recheck system.
Step Action Yes No
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2. Go to “Electronic
Stability Program
System Check”.
2 Check brake fluid level
1) Check brake fluid level in reservoir.
Is brake fluid level upper than the minimum level? Go to Step 3. Replenish brake fluid to
reservoir.
3 DTC check for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP ®.
Is DTC U1073 and/or U1140 detected? Go to applicable diag.
flow.
Go to Step 3.
4 Check brake fluid level switch
1) Turn ignition switch to OFF position.
2) Disconnect brake fluid level switch connector.
3) Check for proper connection at each terminal of brake
fluid level switch connector.
4) If OK, then check brake fluid level switch referring to “Brake Fluid Level Switch Inspection in Section 9C”.
Is check result OK? Go to Step 5. Replace brake fluid
level switch.
5 Check brake fluid level switch circuit
1) Disconnect BCM connector.
2) Check for proper connection to BCM connector at “E46-
5” terminal.
3) If OK, then check resistance between “E46-5” terminal and vehicle body ground.
Is resistance infinity? Go to Step 6. “BLKL/RED” wire circuit
is shorted to ground.
6 Check BCM
1) Connect brake fluid level switch connector and BCM
connector.
2) Check voltage at “E46-5” terminal of BCM referring to “Inspection of BCM and its Circuits in Section 10B”.
Is voltage in good condition? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. Check BCM power and
ground circuit. If circuit
is OK, substitute a
known-good BCM and
recheck.
DTC Detecting Condition
Trouble Area
Power supply voltage to master cylinder pressure sensor
in ESP® hydraulic unit / control mo dule assembly is out of
specification. • ESP
® control module

Downloaded from www.Manualslib.com manuals search engine 4F-32 Electronic Stability Program:
DTC C1021, C1022 / C1025, C1026 / C1031, C1032 / C1035, C1036: Wheel Speed Sensor Circuit or
Encoder Failure
S7RS0B4604051
DTC C1021 / C1025 / C1031 / C1035: Right-Front / Left-Front / Right-Rear / Left-Rear Wheel Speed
Sensor Circuit Failure
DTC C1022 / C1026 / C1032 / C1036: Right-Front / Left-Front / Right-Rear / Left-Rear Wheel Speed
Sensor or Encoder Failure
Wiring Diagram
DTC Detecting Condition and Trouble Area
NOTE
When the vehicle was operated in any of the following ways, one of these DTCs may be set even when
the sensor is in good condition. If such possibility is suspected, clear DTC once referring to “DTC
Clearance” and then performing the driving test as described in Step 2 of “Electronic Stability Program
System Check”, check whether or not any abnormality exists.
• The vehicle was driven with parking brake pulled.
• Wheel spin occurred while driving.
• Wheel(s) was turned while the vehicle was jacked up.
• The vehicle was stuck.

DTC Troubleshooting
[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
RED/BLKRED E85-15 E85-14
12V
BLKWHT
1
WHT/BLKWHTE85-2 E85-3
12V
BLKWHT
2
BLKWHTLT GRN/BLKLT GRNE85-6 E85-5
12V
3
BLKWHTBRNE85-11 E85-12
12V
4YEL 5
I6RS0B460016-01
[A]: ESP
® control module connector (viewed from
terminal side) 2. Right- front wheel speed sensor 4. Right-rear wheel speed sensor
1. Left-front wheel speed sensor 3. Left-rear wheel speed sensor 5. ESP ® hydraulic unit / control module assembly
DTC Detecting Condition Trouble Area
DTC C1021, C1025, C1031, C1035:
Wheel sensor signal is out of specified range.
DTC C1022, C1026, C1032, C1036:
Abnormal wheel speed sensor signal is detected. • Wheel speed sensor
• Wheel speed sensor circuit
• Wheel encoder
• ESP
® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.

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DTC Detecting Condition and Trouble Area
DTC Troubleshooting
DTC C1028: Master Cylinder Pressure Sensor Circuit FailureS7RS0B4604031
DTC Detecting Condition and Trouble Area
DTC TroubleshootingDTC Detecting Condition Trouble Area
Mechanical switch failure, fa ilure in switch wiring is
shorted to ground. • ESP
® OFF switch
• ESP ® OFF switch circuit
• ESP ® control module
Step Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 Check ESP ® OFF switch condition
Is ESP
® OFF switch is OFF condition? Go to Step 3. ESP
® OFF switch
turned OFF condition
and recheck.
3 Check ESP ® OFF switch
1) Turn ignition switch to OFF position.
2) Remove ESP® OFF switch referring to “ESP ® OFF
Switch Removal and Installation”.
3) Check for proper connection at each terminal of ESP ®
OFF switch.
4) If OK, then check ESP ® OFF switch referring to “ESP ®
OFF Switch Inspection”.
Is it good condition? Go to Step 4. Replace ESP
® OFF
switch.
4 Check ESP ® OFF switch circuit
1) Disconnect ESP ® control module connector.
2) Check for proper connection to ESP ® control module
connector at “E85-7” terminal.
3) If OK, then check resistance between “E85-7” terminal and vehicle body ground.
Is resistance infinity? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly and recheck. “LT GRN/RED” wire
circuit is shorted to
ground.
DTC Detecting Condition
Trouble Area
Input signal voltage from master cylinder pressure sensor
in ESP ® control module is too high or low. • Leakage or air in the hydraulic brake system
• Clearance between brake pad and disc too high
Step
Action YesNo
1 Was “Electronic Stability Pr ogram Check” performed? Go to Step 2.Go to “Electronic
Stability Program
System Check”.
2 Check brake system
1) Check brake system as follows.
• Leakage or air in the hydraulic brake system
• Clearance between brake pad and disc too high
Are they in good condition? Go to Step 3.
Repair, replace or
adjust.
3 Check sensor calibration
1) Calibrate master cylinder pressure sensor referring to
“Sensor Calibration”.
2) Clear all DTC(s) and recheck DTC.
Is DTC C1028 still detected? Substitute a known-
good ESP
® hydraulic
unit / control module
assembly recheck. Master cylinder
pressure sensor
calibration was
incompleted.

Downloaded from www.Manualslib.com manuals search engine 4F-54 Electronic Stability Program:
Repair Instructions
ESP® Hydraulic Unit Operation CheckS7RS0B4606025
1) Check that basic brake system other than ESP ® is
in good condition.
2) Check that battery voltage is 11 V or higher.
3) Lift up vehicle.
4) Set transmission to neutral and release parking brake.
5) Turn each wheel gradually by hand to check if braked ragging occurs. If it does, correct.
6) Connect SUZUKI scan tool to data link connector (DLC) (1) with ignition switch OFF.
Special tool
(A): SUZUKI scan tool
7) Turn ignition switch to ON position and select menu press / depress in “HYDRAULIC CONTROL TEST”
under “miscellaneous test” (“MISC. TEST”) mode of
SUZUKI scan tool.
Refer to SUZUKI scan tool operator’s manual for
further details.
8) Perform the following checks with help of another person.
• Depressurization checkStep on brake pedal (1) and then select testing
wheel by SUZUKI scan tool and the wheel (2)
should be turned by another person’s hand. At this
time, check whether the wheel rotates freely due
to brake depressurization. • Pressurization check
Step off brake pedal (1) and then select testing
wheel by SUZUKI scan tool and the wheel (2)
should be turned by another person’s hand. At this
time, check whether the wheel locks due to brake
pressurization.
NOTE
Pressurization / Depressurization by SUZUKI
scan tool is available for 0.5 second.

9) Check for all 4-wheels condition respectively. If a faulty condition is found, replace hydraulic unit /
control module assembly.
10) After completing the check, turn ignition switch to OFF position and disconnect SUZUKI scan tool from
DLC.
Sensor CalibrationS7RS0B4606015
CAUTION!
If any DTC(s) other than C1075, C1076 or
C1078 are detected, sensor calibration can
not be completed. Repair the detected DTC
first.

NOTE
Steering angle sensor calibration is needed
when battery, “DOME” fuse or the steering
angle sensor is removed.
This sensor calibration can be done with/
without SUZUKI Scan Tool.
When ESP ® control module and/or yaw rate /
G sensor assembly is removed, sensor
calibration is needed with SUZUKI Scan Tool.

(A)
1
I4RS0B450003-01
I4RH01450021-01

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3) Remove front brake pipe referring to “Front Brake Hose / Pipe Removal and In stallation in Section 4A”.
4) Remove ESP ® hydraulic unit / control module with
bracket from vehicle by removing bracket bolts.
5) Remove bolt (4) and pull out ESP ® hydraulic unit /
control module assembly (1) from bracket (3) using
flat end rod or the like (2).
Installation 1) Install hydraulic unit / co ntrol module assembly and
by reversing removal procedure.
Tightening torque
Brake pipe flare nut: 16 N·m (1.6 kgf-m, 11.5 lb-
ft)
ESP ® hydraulic unit / control module assembly
bolt: 9 N·m (0.9 kgf-m, 6.5 lb-ft)
ESP ® hydraulic unit / control module assembly
bracket bolt: 25 N·m (2.5 kgf-m, 18.0 lb-ft)
2) Bleed air from brake system referring to “Air Bleeding of Brake System in Section 4A”.
3) Check each installed part for fluid leakage.
4) Connect SUZUKI Scan Tool.
5) Turn ignition switch to ON position. And SLIP indicator lamp flush. (Other than replace with new
one) If other than SLIP indicator lamp light, check
DTC and repair it.
6) Turn ignition switch to ON position. And ESP®
warning lamp, SLIP indicator lamp, ESP ® OFF
lamp, Brake warning lamp lights and ABS warning
lamp flush. (Replace new one)
7) Check DTC.
NOTE
If any DTC(s) other than C1075, C1076 or
C1078 are detected, sensor calibration can
not be completed. Repair the detected it(s)
first.

8) Perform “Sensor Calibration”.
9) Perform “ESP ® Hydraulic Unit Operation Check”.
10) Turn ignition switch to OFF position once and then
ON position. In this state, make sure that indicator
light and warning light turns off.
11) Check DTC(s) are not stored in hydraulic unit / control module.
Front / Rear Wheel Speed Sensor On-Vehicle
Inspection
S7RS0B4606028
CAUTION!
Incorrect voltage and/or wrong connection
cause damage to wheel speed sensor.

Output Voltage Inspection
1) Disconnect negative (–) cable from battery.
2) Hoist vehicle a little.
3) Disconnect wheel speed sensor connector.
4) Disconnect wheel speed grommet from vehicle body.
5) Set up measuring devices as shown in figure, the resistance to 115 Ω and the power supply voltage
to12 V.
4
1
2 3
I6RS0B460030-02
[A]: Front wheel speed sensor 3. “WHT” wire terminal
[B]: Rear wheel speed sensor 4. “BLK” wire terminal
1. Wheel speed sensor connector 5. Power supply (12 V)
2. Resistance (115 Ω)
V
2
5
4 1
3
43
1
[A]
[B]
I6RS0B460031-02

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Front Wheel Encoder On-Vehicle InspectionS7RS0B4606033
Before inspect front wheel encoder, remove front drive
shaft or front wheel spindle referring to “Front Drive Shaft
Assembly Removal and Installation in Section 3A”.
• Check encoder (1) for being crack, damaged or deformed.
• Turn wheel and check if encoder rotation is free from eccentricity and looseness.
• Check that no foreign material is attached. If any faulty is found, cl ean encoder or replace wheel
bearing. Refer to “Front Wheel Hub, Steering Knuckle
and Wheel Bearing Removal and Installation in
Section 2B”.
Front Wheel Encoder Removal and InstallationS7RS0B4606034
CAUTION!
Front wheel encoder is included in front
wheel bearing. If front wheel encoder needs
to replaced, replace it as a front wheel
bearing.

For removal and installation of front wheel bearing,
referring to “Front Wheel Hub, Steering Knuckle and
Wheel Bearing Removal and Installation in Section 2B”.
Rear Wheel Encoder On-Vehicle InspectionS7RS0B4606035
Before inspect rear wheel encoder, hoist vehicle and
remove wheel.
• Check encoder (1) for being crack, damaged or deformed.
• Turn wheel and check if encoder rotation is free from eccentricity and looseness.
• Check that no foreign material is attached. If any faulty is found, cl ean encoder or replace rear
wheel hub assembly. Refer to “Rear Wheel Hub
Removal and Installati on in Section 2C”.
Rear Wheel Encoder Removal and InstallationS7RS0B4606036
CAUTION!
Rear wheel encoder is included in rear wheel
hub assembly. If rear wheel encoder needs to
replaced, replace it as a rear wheel hub
assembly.

For removal and installation of front wheel hub
assembly, referring to “Rear Wheel Hub Removal and
Installation in Section 2C”.
Master Cylinder Pressure Sensor On-Vehicle
Inspection
S7RS0B4606016
1) Calibrate yaw rate / G sens or assembly referring to
“Sensor Calibration”.
2) Check that basic brake system other than ESP ®
refer to “Brakes Diagnosi s Note in Section 4A”.
3) Connect SUZUKI scan tool to data link connector (DLC) (1) with ignition switch OFF.
Special tool
(A): SUZUKI scan tool
1
I5JB0A450034-01
1
I6RS0B460038-03
(A)
1
I4RS0B450003-01