Repair Instructions; Abs Hydraulic Unit Operation Check - Suzuki GRAND VITARA Owner's Manual

4E-30 ABS:
Step
5 1) Turn ignition switch to OFF position.
2) Disconnect connectors of ABS hydraulic unit / control
module and ECM.
3) Check CAN communication circuit between ABS and
ECM for open, short and high resistance.
Is CAN communication circuit in good condition?
6 1) Connect connectors of ABS hydraulic unit / control
module and ECM.
2) Check DTCs for BCM, TCM, 4WD control module (if
equipped).
Is DTC U1100 in BCM, DTC P1777 in TCM (for A/T model)
and/or DTC U1100 in 4WD control module (if equipped)
detected?

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) Lift up vehicle.
4) Set transmission to neutral and release parking
brake.
5) Turn each wheel gradually by hand to check if brake
dragging occurs. If it does, correct.
6) Connect SUZUKI scan tool to data link connector
(DLC) (1) with ignition switch OFF.
Special tool
(A): SUZUKI scan tool
(A)
7) Turn ignition switch to ON position and select menu
to "HYDRAULIC CONTROL TEST" under
"miscellaneous test" ("MISC. TEST") mode of
SUZUKI scan tool.
Action

Repair Instructions

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1
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Yes
Go to Step 6.
Check ECM power and
ground circuit. If circuit
is OK, substitute a
known-good ECM and
recheck.
8) Perform the following checks with help of another
person.
Brake pedal (1) should be depressed and then select
testing wheel by SUZUKI scan tool and the wheel (2)
should be turned by another person's hand. At this
time, check that:
• Operation sound of solenoid is heard and the
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.
9) Check for all 4-wheels condition respectively. If a
faulty condition is found, replace hydraulic unit /
control module assembly.
10) After completing the check, turn ignition switch to
OFF position and disconnect SUZUKI scan tool from
DLC.
No
Repair insulation of
CAN communication
line circuit referring to
"Precaution for CAN
Communication
System: in Section 00".
Check ABS power and
ground circuit. If circuit
is OK, substitute a
known-good ABS
hydraulic unit / control
module assembly and
recheck.
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