2005 SUZUKI JIMNY All

Downloaded from www.Manualslib.com manuals search engine ANTILOCK BRAKE SYSTEM (ABS) 5E-19
INSPECTION
Step Action Yes No
1 Is G sensor installed floor securely? Go to step 2. Tighten sensor or bracket
screw securely. If not, use
new screw.
2 1) Ignition switch OFF.
2) Remove G sensor with bracket.
3) Check for proper connection to G sensor.
4) If OK, then check G sensor referring to “G
Sensor” in this section.
Is it in good condition?Go to step 3. Replace G sensor.
3 1) Disconnect connectors from ABS hydraulic
unit / control module assembly (See [A])
and G sensor.
2) Check for proper connection to ABS control
module at terminals “A11” and “A13”.
3) If OK, then turn ignition switch ON and mea-
sure voltage between “B/W” terminal of sen-
sor connector and body ground.
Is it 10 – 14 V?Go to step 4.“B/W” circuit open.
4 Measure voltage between “R/W” terminal of
sensor connector and body ground.
Is it 0 V?Go to step 5.“R/W” circuit shorted to
power circuit.
5 1) Ignition switch OFF.
2) Check that “R/W” circuit is free from open or
short to ground and “Or/B” circuit. (See [B])
Is it in good condition?“Or/B” circuit open.
If circuit is OK, substitute
a known-good ABS
hydraulic unit / control
module assembly.“R/W” circuit open or
shorted to ground or “Or/
B” circuit.
1. ABS hydraulic unit / control module connector
2. Lock position
3. Unlock position

Downloaded from www.Manualslib.com manuals search engine 5E-22 ANTILOCK BRAKE SYSTEM (ABS)
INSPECTION
Step Action Yes No
1 1) Disconnect the applicable sensor connector with ignition
switch OFF.
2) Measure resistance between sensor terminals.
Resistance of wheel speed sensor: 1.4 – 1.8 kΩ (at
20°C, 68°F)
3) Measure resistance between each terminal and body
ground.
Insulation resistance: 1MΩ or higher
Were measured resistance values in step 2) and 3) as spec-
ified? (See [A])Go to step 2. Replace sensor.
2 1) Ignition switch OFF.
2) Disconnect connector from ABS hydraulic unit / control
module assembly. (See [B])
3) Check for proper connection to ABS hydraulic unit / con-
trol module assembly at each sensor terminal.
4) If OK, then turn ignition switch ON and measure voltage
between sensor positive terminal of module connector
and body ground.
Is it 0V?Go to step 3. Sensor positive cir-
cuit shorted to
power.
3 1) Ignition switch OFF.
2) Connect connector to sensor.
3) Measure resistance between sensor terminals at mod-
ule connector.
4) Measure resistance between sensor positive terminal
and negative terminal of module connector, between
positive terminal and body ground.
Are measured resistance values within each specified range
described in above step 1?Go to step 4. Circuit open or
shorted to ground.
4 1) Remove wheel speed sensor.
2) Check sensor for damage or foreign material being
attached.
Is it in good condition? (See [C])Go to step 5. Clean or replace
sensor.
5 Check visually through wheel speed sensor installation hole
for following.
Ring serration (teeth) neither missing or damaged.
No foreign material being attached.
Ring not being eccentric.
Wheel bearing free from excessive play.
Are they in good condition? (See [D])Go to step 6. Clean, repair or
replace.
6 1) Install sensor to knuckle or axle housing.
2) Tighten sensor bolt to specified torque and check that
there is not any clearance between sensor and knuckle
or axle housing. (See [E])
Replace sensor if any.
Referring to “Front Wheel Speed Sensor” in this section,
check output voltage or waveform of sensor. Is proper out-
put voltage or waveform obtained?Substitute a known-
good ABS hydraulic
unit / control module
assembly and
recheck.Replace sensor and
recheck.

Downloaded from www.Manualslib.com manuals search engine ANTILOCK BRAKE SYSTEM (ABS) 5E-27
DTC C1063 (DTC 63) – ABS Fail Safe Circuit
DESCRIPTION
The ABS control module monitors the voltage at the terminal of the solenoid circuit constantly with the ignition
switch turned ON. Also, immediately after the ignition switch is turned “ON”, perform an initial check as follows.
Switch the fail safe transistor in the order of ON → OFF → ON and check if the voltage at 6 solenoid circuit ter-
minals changes to High → Low → High. If anything faulty is found in the initial check and when the voltage at all
solenoid circuit terminals is low with the ignition switch turned ON and ABS not operated, this DTC will be set.
INSPECTION
1. Ignition switch 3-1. Lock position
2. ABS hydraulic unit / control module assembly 3-2. Unlock position
3. ABS hydraulic unit / control module connector of harness
Step Action Yes No
1 Check battery voltage. Is it about 11 V or
higher?Go to step 2. Check charging system
referring to “Under-
charged Battery” in Sec-
tion 6H.
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
module connector.
3) Check proper connection to ABS hydraulic
unit / control module at terminal “A25”.
4) If OK, then measure voltage between con-
nector terminal “A25” and body ground.
Is it 10 – 14 V?Substitute a known-good
ABS hydraulic unit / con-
trol module assembly and
recheck.“W/Bl” circuit open or
short to ground.

Downloaded from www.Manualslib.com manuals search engine 5E-28 ANTILOCK BRAKE SYSTEM (ABS)
DTC C1071 (DTC 71) – ABS Control Module
DESCRIPTION
This DTC will be set when an internal fault is detected in the ABS control module.
INSPECTION
Step Action Yes No
1 1) Ignition switch OFF.
2) Disconnect connectors from ABS control
module.
3) Check for proper connection to ABS control
module at all terminals.
Are they in good condition?Substitute a known-good
ABS control module and
recheck.Repair or replace.

Downloaded from www.Manualslib.com manuals search engine ANTILOCK BRAKE SYSTEM (ABS) 5E-29
On-Vehicle Service
Precaution
When connectors are connected to ABS hydraulic unit / control
module assembly, do not disconnect connectors of sensors, fuse
etc. and turn ignition switch ON. Then DTC will be set in ABS con-
trol module.
ABS Hydraulic Unit Operation Check
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.
7) With diag. switch terminal (3) of monitor connector (1) con-
nected to ground terminal (2) by using service wire (4), turn
ignition switch ON and check if ABS warning lamp indicates
DTC 12.
When other DTC’s appear on display, refer to “ABS Diagnos-
tic Flow Table” in this section.
8) Turn ignition switch OFF.
9) Perform 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.
11) Turn ignition switch OFF.
12) Remove service wire from monitor connector.

Downloaded from www.Manualslib.com manuals search engine 5E-30 ANTILOCK BRAKE SYSTEM (ABS)
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 at battery.
2) Using special tool, disconnect brake pipes from ABS hydrau-
lic unit / control module assembly (1).
Special tool
(A) : 09950-78220 CAUTION:
Do not 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 Tightening torque
2. ABS hydraulic unit / control module assembly 4. Connector
NOTE:
Put bleeder plug cap onto pipe to prevent fluid from spill-
ing. Do not allow brake fluid to get on painted surfaces.

Downloaded from www.Manualslib.com manuals search engine ANTILOCK BRAKE SYSTEM (ABS) 5E-31
3) Disconnect ABS hydraulic unit / control module assembly
connector (1) by pulling up lock.
4) Remove ABS hydraulic unit / control module assembly with
its bracket.
5) Remove three bolts (3) and take out ABS hydraulic unit /
control module assembly (1) from bracket (2).
INSTALLATION
1) Install hydraulic unit by reversing removal procedure.
Tightening torque
Brake pipe flare nuts
(a) : 16 N·m (1.6 kg-m, 12.0 lb-ft)
ABS hydraulic unit / control module assembly bracket
bolts
(b) : 11 N·m (1.1 kg-m, 8.0 lb-ft)
ABS hydraulic unit / control module assembly bolts
(c) : 9 N·m (0.9 kg-m, 6.5 lb-ft)
2) Bleed air from brake system referring to “Air Bleeding of
Brake System” in Section 5.
3) Check each installed part for fluid leakage and perform
hydraulic unit operation check.
2. Lock position
3. Unlock position
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.
1. To left front
2. To right front
3. To rear
4. From proportioning valve

Downloaded from www.Manualslib.com manuals search engine 5E-32 ANTILOCK BRAKE SYSTEM (ABS)
Front Wheel Speed Sensor
OUTPUT VOLTAGE INSPECTION
1) Turn ignition switch OFF.
2) Hoist vehicle a little.
3) Disconnect connector of wheel speed sensor.
4) Connect voltmeter between connector terminals.
5) While turning wheel at a speed of approximately 1 full rota-
tion to 1 1/3 rotation per second, check AC voltage of sensor.
Output AC voltage at 1 to 1 1/3 rotation per second
: 120 mV or more at 42 – 54 Hz
If measured voltage is not as specified, check sensor, rotor and
their installation conditions.
1. Front wheel speed sensor 3. Knuckle
2. Sensor ring
1. Wheel speed sensor coupler
2. Right wheel sensor terminals
3. Left wheel sensor terminals