2000 SUZUKI SWIFT Brake

ANTILOCK BRAKE SYSTEM (ABS) 5E-29
DTC C1063 (DTC 63) – ABS FAIL-SAFE RELAY CIRCUIT
DESCRIPTION
ABS control module monitors the voltage at the terminal of solenoid circuit constantly with ignition switch turned
ON. Also, immediately after ignition switch is turned ON, perform initial check as follows.
Switch fail-safe relay in the order of OFF → ON and check if voltage changes to Low → High. If anything faulty
is found in the initial check and when the voltage is low with ignition switch turned ON, this DTC will be set.
INSPECTION
1. Ignition switch 3. ABS hydraulic unit/control module connector 5. To pump motor relay
2. ABS hydraulic unit/control module assembly 4. To solenoid valves 6. Fail-safe relay
Step Action Yes No
1 Check battery voltage. Is it about 11 V or
higher?Go to Step 2. Check charging system
referring to “CHARGING
SYSTEM” section.
2 Check ABS main fuse and connection.
Is it in good condition?Go to Step 3. Repair and/or replace
fuse.
3 1) Ignition switch OFF.
2) Disconnect ABS hydraulic unit/control mod-
ule connector.
3) Check proper connection to ABS hydraulic
unit/control module at terminal “E19-25”.
4) If OK, then measure voltage between con-
nector terminal “E19-25” and body ground.
Is it 10 – 14 V?Substitute a known-good
ABS hydraulic unit/con-
trol module assembly and
recheck.“WHT/BLU” circuit open
or short to ground.

5E-30 ANTILOCK BRAKE SYSTEM (ABS)
DTC C1071 (DTC 71) – ABS CONTROL MODULE
DESCRIPTION
This DTC will be set when an internal malfunction is detected in the ABS control module.
INSPECTION
1. ABS hydraulic unit/control module assembly 3. ABS pump motor 5. ABS hydraulic unit/control module connector
2. ABS pump motor relay 4. ABS fail safe relay
Step Action Yes No
1 Clear all DTCs and check DTC.
Is it DTC 71?Go to Step 2. Could be a temporary
malfunction of the ABS
control module.
2 1) Check proper connection of ABS hydraulic
unit/control module connector.
2) If OK, disconnect ABS hydraulic unit/control
module connector and check the followings.
Voltage “E19-25” terminal : 10 – 14 V
Resistance between “E19-22” and body
ground : Continuity
Are the check result as specified above?Replace ABS hydraulic
unit/control module
assembly.Repair and recheck.

ANTILOCK BRAKE SYSTEM (ABS) 5E-31
ON-VEHICLE SERVICE
PRECAUTIONS
When connector is connected to ABS hydraulic unit/control mod-
ule assembly, do not disconnect connectors of sensors with igni-
tion switch ON. Then DTC will be set in ABS control module.
ABS HYDRAULIC UNIT OPERATION CHECK
(USING SUZUKI SCAN TOOL)
1) Connect SUZUKI scan tool to data link connector (DLC) (1)
with ignition switch OFF.
Special tool
(A) : 09931-76011 (SUZUKI scan tool)
(B) : Mass storage cartridge
(C) : 09931-76030 (16/14 pin DLC cable)
2) Turn ignition switch to ON position and check actuator oper-
ation using “HYDRAULIC CONTROL TEST” under “miscel-
laneous test” (“MISC. TEST”) mode of SUZUKI scan tool.
ABS HYDRAULIC UNIT OPERATION CHECK
(NOT USING SUZUKI SCAN TOOL)
1) Check that basic brake system other than ABS is in good
condition.
2) Check that battery voltage is 11 V or higher.
3) With ABS warning lamp, check that no abnormality is
detected in ABS. Refer to “DIAGNOSTIC TROUBLE CODE
(DTC) CHECK” 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 drag-
ging occurs. If it does, correct.
(A)
(B) (C) 1

5E-32 ANTILOCK BRAKE SYSTEM (ABS)
7) With diagnosis switch terminal (1) of monitor coupler (2) con-
nected to ground terminal (3) using service wire (4), turn
ignition switch ON and check if ABS warning lamp indicates
DTC 12.
If malfunction DTC is indicated, repair it first.
8) Turn ignition switch OFF.
9) Perform the following checks with help of another person.
Brake pedal (1) should be depressed and then ignition
switch (2) turned ON by one person and wheel (3) 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
hydraulic unit/control module assembly.
11) Turn ignition switch OFF and remove service wire from mon-
itor coupler.
3 22
1
4

ANTILOCK BRAKE SYSTEM (ABS) 5E-33
ABS HYDRAULIC UNIT/CONTROL MODULE ASSEMBLY
HYDRAULIC UNIT INSPECTION
Check hydraulic unit for fluid leakage.
If any, repair or replace.
REMOVAL
1) Disconnect negative cable from battery.
2) Disconnect ABS hydraulic unit/control module assembly
connector (1) by pulling up lock (2). CAUTION:
Never disassemble ABS hydraulic unit/control module assembly, loosen blind plug or remove motor.
Performing any of these prohibited services will affect original performance of ABS hydraulic unit/
control module assembly.
1. Brake pipe 3. Bracket
2. ABS hydraulic unit/control module assembly 4. Connector
9 N·m (0.9 kg-m)
9 N·m (0.9 kg-m)
26 N·m (2.6 kg-m)
16 N·m (1.6 kg-m)
16 N·m (1.6 kg-m)
4 2
3
11
1

5E-34 ANTILOCK BRAKE SYSTEM (ABS)
3) Using special tool, loosen flare nuts (1) and disconnect
brake pipes (2) from ABS hydraulic unit/control module
assembly (3).
Special tool
09950-78220
4) Remove two nuts and disconnect take out ABS hydraulic
unit/control module assembly (1) from bracket using flat end
rod or the like (2).
INSTALLATION
1) Install hydraulic unit/control module assembly by reversing
removal procedure.
Tightening torque
Brake pipe flare nut (a) :
16 N·m (1.6 kg-m, 11.5 lb-ft)
ABS hydraulic unit/control module assembly bolt (b) :
9 N·m (0.9 kg-m, 6.5 lb-ft)
ABS hydraulic unit/control module assembly bracket bolt
(c) : 26 N·m (2.6 kg-m, 18.0 lb-ft)
2) Bleed air from brake system referring to “BRAKES” section.
3) Check each installed part for fluid leakage and perform “ABS
HYDRAULIC UNIT OPERATION CHECK” in this section. NOTE:
Put bleeder plug cap onto pipe to prevent fluid from spill-
ing. Do not allow brake fluid to get on painted surfaces.
312
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.
NOTE:
For new ABS hydraulic unit/control module assembly, if
“ABS HYDRAULIC UNIT OPERATION CHECK” procedure
has not been performed, “ABS” warning lamp may flash
when ignition switch is turned ON position.
Accordingly preform “ABS HYDRAULIC UNIT OPERA-
TION CHECK” to stop flashing of ABS warning lamp.
(b)
(c) (b)(a)

ANTILOCK BRAKE SYSTEM (ABS) 5E-35
FRONT WHEEL SPEED SENSOR
OUTPUT VOLTAGE INSPECTION
1) Turn ignition switch OFF.
2) Hoist vehicle a little.
3) Disconnect wheel speed sensor connector.
4) Disconnect wheel speed sensor grommet from vehicle body.
5) Connect voltmeter between connector (1) terminals.
6) While turning wheel by hand at a speed of approximately 1/2
rotation to 1 rotation per second, check AC voltage of sen-
sor.
Output AC voltage at 1/2 to 1 rotation per second
: 106 mV or more
7) If measured voltage is not as specified, check sensor, rotor
and their installation conditions.
1. Left front wheel speed sensor 3. Grommet 5. Sensor ring
2. Clamp bolt 4. Connector

5E-36 ANTILOCK BRAKE SYSTEM (ABS)
Reference
When using oscilloscope for this check, check if peak-to-peak
voltage (1) meets specification and waveform is complete.
Peak-to-peak voltage at 1/2 to 1 rotation per second
: 150 mV or more at 20 Hz
REMOVAL
1) Disconnect negative cable at battery.
2) Disconnect front wheel speed sensor coupler (1).
3) Hoist vehicle and remove wheel.
4) Remove harness clamp bolts (2) and grommet (3).
5) Remove front wheel speed sensor (4) from knuckle.
SENSOR INSPECTION
Check sensor for damage.
Check sensor for resistance and continuity.
Between both terminals (1) sensor
: 1.2 – 1.6 k
Ω
ΩΩ Ω at 20°C (68°F)
Between sensor terminal and sensor body (2)
: No continuity
If the check result is not as specified and any malcondition is
found, replace.
CAUTION:
Do not pull wire harness when removing front wheel
speed sensor.
Do not cause damage to surface of front wheel speed
sensor and do not allow dust, etc. to enter its installa-
tion hole.