Suzuki Grand Vitara 1998, Service Manual

Page: 363 / 801

YH4
GRAND
VITARA
5E1-22 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
1. ABS hydraulic
unit / control
module connector
INSPECTION
STEP ACTION YES NO
1 Is G sensor installed floor securely? Go to step 2. Tighten sensor or
bracket screw
securely. If not,
using 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 item
INSPECTION of G sensor.
Is it in good condition?
Go to step 3. Replace G sensor.
3 1) Disconnect connectors from ABS hydraulic unit /
control module assembly (See Fig. 1) and G sensor.
2) Check for proper connection to ABS control module
at terminals “A14” and “A4”.
3) If OK, then turn ignition switch ON and measure
voltage between “B / W” terminal of sensor
connector and body ground.
Is it 10 – 14 V?
Go to step 4. “B / W” circuit open.
4 Measure voltage between “O / W” terminal of sensor
connector and body ground.
Is it 0 V? Go to step 5. “O / W” circuit
shorted to power
circuit.
5 1) Ignition switch OFF.
2) Check that “O / W” circuit is free from open
or short to ground and “O / G” circuit.
Is it in good condition? (See Fig. 2)
“O / G” circuit open.
If circuit is OK, substi-
tute a known-good
ABS hydraulic
unit / control module
assembly. “O / W” circuit open
or shorted to
ground or “O / G”
circuit.
Fig. 1 Fig. 2