2003 SUZUKI GRAND VITARA Rear brake

YH4
GRAND
VITARA
1. Wheel speed sensor
(Right-front)
2. Stop lamp switch
3. Data link connector
4. ªABSº warning lamp
5. Wheel speed sensor
(Right-rear)6. Wheel speed sensor
(Left-rear)
7. Ground
8. Diagnosis connector (Black connector)
9. Wheel speed sensor
(Left-front)10. ABS hydraulic unit/control module assembly
with ABS pump motor relay
and fail-safe relay
11. G sensor (For 4WD model only)
12. Wheel speed sensor rotor (ring)
13. 4WD switch (For 4WD model only)
14. EBD warning lamp (Brake warning lamp)
LH steering vehicle
RH steering vehicle
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-5
ABS COMPONENT PARTS LOCATION

YH4
GRAND
VITARA
5E1-14 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
DIAGNOSTIC TROUBLE CODE (DTC) TABLE
DTC
(indicated
DTC
(displayedVOLTMETER INDICATION(indicated
by ABS
i
(dis layed
on
SUZUKI
VOLTMETER INDICATION
(or ªABSº warning
lflhi tt)
DIAGNOSTIC AREA
warning
lamp)SUZUKI
scan tool)
lamp flashing pattern)
15C1015G sensor (for 4WD model only)
21C1021Right-21C1021g
front
25C1025Left-25C1025front
31C1031Right-31C1031g
rear
35C1035Left-35C1035rearWheel speed sensor circuit and rotor
22C1022Right-Wheel speed sensor circuit and rotor
22C1022g
front
26C1026Left-26C1026front
32C1032Right-32C1032g
rear
36C1036Left-36C1036rear
41C1041Right-Inlet solenoid circuit41C1042
g
frontOutlet solenoid circuit
45C1045Left-Inlet solenoid circuit45C1046frontOutlet solenoid circuit
56C1055RearInlet solenoid circuit56C1056RearOutlet solenoid circuit
57C1057Solenoid and pump motor power source circuit
61C1061ABS pump motor (in hydraulic unit) circuit
63C1063ABS fail-safe relay circuit
71C1071ABS control moduleInternal malfunction
12±Normal

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-15
1. Battery
2. Main fuses
3. Ignition switch
4. Circuit fuses
5. ABS hydraulic unit / control module
5-1. Terminal arrangement for ABS hydraulic unit /
control module assembly
5-2. ABS fail-safe relay (Solenoid valve relay)
5-3. ABS pump motor relay
5-4. Pump motor
5-5. Solenoid valves
6. ªABSº warning lamp
7. Right-rear wheel speed sensor
8. Left-rear wheel speed sensor
9. Right-front wheel speed sensor
10. Left-front wheel speed sensor
11. Data link connector
12. Diagnosis connector
13. Stop lamp
14. Stop lamp switch
15. PCM (ECM+TCM) or ECM
16. G sensor (For 4WD model only)
17. 4WD switch (For 4WD model only)
18. 4WD indicator lamp (For 4WD model only)
19. 4WD controller (If equipped)
20. EBD warning lamp (Brake warning lamp)
21. Combination meter
22. Parking brake switch
23. Brake fluid lever switch
24. Warning lamp driver moduleWire colorB : Black
B / Bl : Black / Blue
B / O : Black / Orange
B / W : Black / White
Bl : Blue
Bl /B : Blue / Black
Bl / O : Blue / Orange
Br : Brown
G : Green
G / B : Green / Black
G / W : Green / White
Lg : Lightgreen
Lg / B : Lightgreen / Black
O / B : Orange / Black
O / G : Orange / Green
O / W : Orange / White
P : Pink
P / B : Pink / Black
V / G : Violet / Green
W / BI : White / Blue
W / G : White / Green
W / Y : White / Yellow
Y : Yellow
Y / B : Yellow / Black
SYSTEM CIRCUIT
TERMINALCIRCUIT
A1Right-rear wheel speed sensor (+)
A2Right-front wheel speed sensor (±)
A3Right-front wheel speed sensor (+)
A4G sensor ground (For 4WD model only)
A5ÐÐÐ
A6ÐÐÐ
A7Idle up signal
A8Diagnosis switch terminal
A9Stop lamp switch
A10Ground (For ABS control module)
A11ABS fail-safe relay
A12Right-rear wheel speed sensor (±)
A13Left-front wheel speed sensor (±)
A14G sensor signal (For 4WD model only)
A15ÐÐÐ
A16ÐÐÐ
A17ªABSº warning lamp
A18Left-rear wheel speed sensor (+)
A19Left-rear wheel speed sensor (±)
A20Left-front wheel speed sensor (+)
A21ÐÐÐ
A22Data link connector
A23ÐÐÐ
A244WD switch (For 4WD model only)
A25Ignition switch
A26ªEBDº warning lamp
A27ABS pump motor relay
A28Ground (For ABS pump motor)

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-23
1. Ignition switch
2. ABS hydraulic unit /
control module assembly
3. Left-front wheel speed
sensor
4. Right-front wheel speed
sensor
5. Left-rear wheel speed
sensor
6. Right-rear wheel speed
sensor
7. ABS hydraulic unit /
control connector of harness
DTC 21 (DTC C1021), 22 (DTC C1022) ± RIGHT-FRONT WHEEL SPEED SENSOR
CIRCUIT
DTC 25 (DTC C1025), 26 (DTC C1026) ± LEFT-FRONT WHEEL SPEED SENSOR
CIRCUIT
DTC 31 (DTC C1031), 32 (DTC C1032) ± RIGHT-REAR WHEEL SPEED SENSOR
CIRCUIT
DTC 35 (DTC C1035), 36 (DTC C1036) ± LEFT-REAR WHEEL SPEED SENSOR
CIRCUIT
DESCRIPTION
The ABS control module monitors the voltage at the positive (+) terminal of each sensor while the ignition switch
is ON. When the voltage is not within the specified range, an applicable DTC will be set. Also, when no sensor signal
is inputted at starting or while running, an applicable DTC will be set.
NOTE:
When the vehicle was operated in any of the following ways, one of these DTC's may be set even when
the sensor is in good condition. If such possibility is suspected, repair the trouble (dragging of brake, etc.)
of the vehicle, clear DTC once and then after performing the driving test as described in Step 2 of ªABS
DIAG. FLOW TABLEº, check whether or not any abnormality exists.
± The vehicle was driven with parking brake pulled.
± The vehicle was driven with brake dragging.
± Wheel spin occurred while driving.
± Wheel(s) was turned while the vehicle was jacked up.
± The vehicle was stuck.

YH4
GRAND
VITARA
5E1-26 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
1. ABS hydraulic unit/
control module assembly
2. ABS hydraulic unit/
control module
connector of harness
1. ABS hydraulic
unit / control
module connector
DTC 41 (DTC C1041 / C1042) ± RIGHT-FRONT SOLENOID CIRCUIT
DTC 45 (DTC C1045 / C1046) ± LEFT-FRONT SOLENOID CIRCUIT
DTC 56 (DTC C1055 / C1056) ± REAR SOLENOID CIRCUIT
DESCRIPTION
The ABS control module monitors the voltage of the terminal of the solenoid circuit constantly with the ignition
switch turned ON. It sets this DTC when the terminal voltage does not become low / high for the ON / OFF command
to the solenoid or the voltage difference between solenoid circuit terminals exceeds the specified value with the
solenoid turned OFF.
INSPECTION
STEPACTIONYESNO
11) Check solenoid referring to item
ªABS HYDRAULIC UNIT OPERATION CHECKº
in this section.
Is it in good condition?Check terminals ªA11º
and ªA27º connection.
If connections OK,
substitute a known-
good ABS hydraulic
unit / control module
assembly and
recheck.Go to step 2.
21) Ignition switch OFF.
2) Disconnect ABS hydraulic unit / control module
connector. (See Fig. 1)
3) Check for proper connection to ABS hydraulic
unit / control module connector at terminal ªA11º.
4) If OK, then measure voltage between terminal
ªA11º of module connector and body ground.
Is it 10 ± 14 V?Substitute a known-
good ABS hydraulic
unit / control module
assembly and
recheck.ªW / Blº circuit open.
Fig. 1

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-31
1. Diagnosis
connector
(6 pins connector)
2. Diag. switch
terminal
3. Ground
4. Service wire
Brake
pedal
Ignition
sw.
Motor
Solenoid
Rear3.0 sec.
3.0
ON-VEHICLE SERVICE
PRECAUTION
When connector are connected to ABS hydraulic unit / control mod-
ule assembly, do not disconnect connectors of sensors and turn
ignition switch ON. Then DTC will be set in ABS control module.
ABS HYDRAULIC UNIT OPERATION CHECK
1) Check that basic brake system other than ABS is in good condi-
tion.
2) Check that battery voltage is 11V or higher.
3) With ªABSº warning lamp, check that no abnormality is de-
tected in ABS. Refer to ªDIAGNOSTIC TROUBLE CODE
(DTC) CHECKº in this section.
4) Lift up vehicle.
5) Set transmission to neutral and release parking brake.
6) Turn each wheel gradually by hand to check if brake dragging
occurs. If it does, correct.
7) With diag. switch terminal of diagnosis connector connected to
ground by using service wire, turn ignition switch ON and check
if ªABSº warning lamp indicates DTC 12.
8) Turn ignition switch OFF.
9) Perform following checks with help of another person.
Brake pedal should be depressed and then ignition switch
turned ON by one person and wheel should be turned by
another person's hand. At this time, check that:

Operation sound of solenoid is heard and wheel turns only
about 0.5 sec. (Brake force is depressurized).

Operation sound of pump motor is heard and pulsation is felt
at brake pedal.
10) If all 4-wheels cannot be checked during one ignition cycle
(OFF
ON), repeat Steps 8) and 9) till all 4 wheels are
checked.
If a faulty condition is found in Steps 9) and 10), replace hydrau-
lic unit / control module assembly.
11) Turn ignition switch OFF and remove service wire from diagno-
sis connector.

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-33
1. ABS hydraulic unit /
control module
assembly
2. Nut
1. To left-front
2. To right-front
3. To rear
4. From master cylinder4) Remove three nuts and take out ABS hydraulic unit / control
module assembly from bracket.
CAUTION:

Do not give an impact to hydraulic unit.

Use care not to allow dust to enter hydraulic unit.

Do not place hydraulic unit on its side or upside down.
Handling it in inappropriate way will affect its original
performance.
INSTALLATION
1) Install hydraulic unit by reversing removal procedure.
Tightening Torque
(a): 16 N
.m (1.6 kg-m, 12.0 lb-ft)
(b): 21 N
.m (2.1 kg-m, 15.5 lb-ft)
(c): 10 N
.m (1.0 kg-m, 7.5 lb-ft)
2) Bleed air from brake system. Refer to ªBLEEDING BRAKESº in
Section 5.
3) Check each installed part for fluid leakage and perform hydraulic
unit operation check.

YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-37
1. Rear wheel speed sensor
2. Sensor rotor
3. Rear axle housing
1. Rear wheel speed
sensor harness
2. Connector
1. Sensor bolt
2. Clamps
REAR WHEEL SPEED SENSOR
OUTPUT VOLTAGE INSPECTION
Check in the same procedure as that used of front wheel speed
sensor check.
Output AC voltage at 2 / 3 to
one rotation per second (25 ± 38 Hz): 106 mV or more
Reference
When using oscilloscope,
peak-to-peak voltage at 2 / 3 to
one rotation per second (25 ± 38 Hz): 150 mV or more
REMOVAL
1) Disconnect negative cable at battery.
2) Hoist vehicle.
3) Disconnect rear wheel speed sensor connector and detach wire
harness from vehicle body and rear axle.
4) Remove harness clamps and remove rear wheel speed sensor
from rear axle.
CAUTION:

Do not pull wire harness when removing rear wheel
speed sensor.

Do not cause damage to surface of rear wheel speed
sensor and do not allow dust, etc. to enter its installa-
tion hole.