Suzuki GA413, Service Manual

Page: 276 / 1246

5E-22 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
INSPECTION
STEP ACTION YES NO
1 1) Disconnect applicable sensor connector with
ignition switch OFF.
2) Measure resistance between sensor terminals.
Resistance of wheel speed sensor: 1.2 – 1.6 k
(at 20 C, 68 F)
3) Measure resistance between each terminal and body
ground.
Insulation resistance: 1M or higher
Were measured resistance values in step 2) and 3) as
specified? (See Fig. 1)
Go to step 2. Replace sensor.
2 1) Ignition switch OFF.
2) Disconnect connector from ABS hydraulic unit / control
module assembly. (See Fig. 2)
3) Check for proper connection to ABS hydraulic
unit / control module assembly at each sensor termi-
nal.
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
circuit shorted to
power.
3 1) Ignition switch OFF.
2) Connect connector to sensor.
3) Measure resistance between sensor terminals at
module 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 Fig. 3)
Go to step 5. Clean or replace
sensor.
5 Check visually through wheel speed sensor installation
hole for following.
Rotor serration (teeth) neither missing or damaged.
No foreign material being attached.
Rotor not being eccentric.
Wheel bearing free from excessive play.
Are they in good condition? (See Fig. 4)
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 Fig. 5)
Replace sensor if any.
Referring to item OUTPUT VOLTAGE INSPECTION of
FRONT WHEEL SPEED SENSOR, check output voltage
or waveform of sensor. Is proper output voltage or
waveform obtained?
Substitute a known-
good ABS hydraulic
unit /control module
assembly and recheck.
Replace sensor
and recheck.