Suzuki Jimny Service Manual page 339

5E-22 ANTILOCK BRAKE SYSTEM (ABS)
INSPECTION
Step
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])
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?
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?
4 1) Remove wheel speed sensor.
2) Check sensor for damage or foreign material being
attached.
Is it in good condition? (See [C])
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])
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?
Action Yes
Go to step 2. Replace sensor.
Go to step 3. Sensor positive cir-
cuit shorted to
power.
Go to step 4. Circuit open or
shorted to ground.
Go to step 5. Clean or replace
sensor.
Go to step 6. Clean, repair or
replace.
Substitute a known- Replace sensor and
good ABS hydraulic recheck.
unit / control module
assembly and
recheck.
No