Suzuki WagonR+ RB310 Service Manual page 2343

5E1-22 ANTILOCK BRAKE SYSTEM (ABS)
DTC 21, 22, 25, 26, 31, 32, 35 or 36
INSPECTION
STEP
1 1) Disconnect applicable ABS wheel speed sensor
coupler with ignition switch OFF.
2) Measure resistance between terminals of ABS
wheel speed sensor. Refer to "Front Wheel Speed
Sensor" and/or "Rear Wheel Speed Sensor" under
"ON-VEHICLE SERVICE" in this section.
Is measured resistance value as specified?
2 1) Turn ignition switch OFF.
2) Disconnect ABS hydraulic unit/control module
connector.
3) Check for proper connection to ABS control module
at each sensor terminal.
4) If OK, then turn ignition switch ON and measure
voltage between sensor terminal of module
connector and body ground.
Is it 0V?
3 1) Turn ignition switch OFF.
2) Connect ABS wheel speed sensor coupler.
3) Measure resistance between the following points.
D Both ABS hydraulic unit/control module connector
terminals of the corresponding sensor.
This check result should be the same as above
STEP 1.
D Either terminal of wheel speed sensor coupler and
body ground.
This check result should be no continuity.
Are both check results OK?
4 1) Remove applicable ABS wheel speed sensor.
2) Check sensor for damage or foreign material
attached.
Is it in good condition?
5 Check front and/or rear sensor ring for the following
(remove rear drum as necessary):
D Rotor serration (teeth) neither missing nor damaged.
D No foreign material being attached.
D Rotor not being eccentric.
D Wheel bearing free from excessive play.
Are they in good condition?
6 1) Install ABS wheel speed sensor to knuckle.
2) Tighten sensor bolt to specified torque and check
that there is no clearance between sensor and
knuckle.
Is it OK?
7 Referring to "Front Wheel Speed Sensor Reference"
and/or "Rear Wheel Speed Sensor Reference" in this
section, check output voltage or waveform.
Is specified voltage and/or waveform obtained?
ACTION YES
Go to Step 2. Replace ABS wheel
speed sensor
assembly.
Go to Step 3. ABS wheel speed
sensor circuit
shorted to power.
Go to Step 4. Circuit open or
shorted to ground.
Go to Step 5. Clean, repair or
replace.
Go to Step 6. Clean, repair or
replace.
Go to Step 7. Replace ABS wheel
speed sensor.
Substitute a known- Replace sensor and
good ABS hydraulic recheck.
unit/control module
assembly and
recheck.
NO