YH4
GRAND
vol.1
0A
0B
1A
1B
3
3A
3B1
3C
3C1
3D
3E
3F
4A2
4B
5
6
7A5A
5B
5C
5E1
6A1
6A2
6A4
6B
6C
6E1
6E2
6F1
6F2
6G
6G1
6H
6K
7A1
7B1
7C1
7D
7E
7F
8
8B
8C
8D
8G
9
10
10A
8A
10B
6-1ENGINE
General Information and
Diagnosis (G16 / J20)
General Information and
Diagnosis (H25)
Engine Mechanical (G16)
Engine Mechanical (H25)
Engine Mechanical (J20)
Engine Cooling
Engine Fuel
Engine and Emission Control
System (SFI for G16 / J20)
Engine and Emission Control
System (SFI for H25)
Ignition System (G16)
Ignition System (J20 / H25)
Cranking System
(Reduction Type)
Cranking System
(No-Reduction Type)
Charging System
Exhaust System
TRANSMISSION, CLUTCH
AND DIFFERENTIAL
Manual Transmission (Type 1)
Manual Transmission (Type 2)
Automatic Transmission
Clutch (Hydraulic Type)
Transfer
Differential (Front)
Differential (Rear)
BODY ELECTRICAL SYSTEM
Wiring Diagram
Lighting System
Instrumentation / Driver
Information
Windows, Mirrors, Security
and Lock
Immobilizer Control System
BODY SERVICE
RESTRAINT SYSTEM
Seat Belt
Air Bag System GENERAL INFORMATION
General Information
Maintenance and Lubrication
TABLE OF CONTENTS TABLE OF CONTENTS SECTIONSECTION
0B
HEATING AND AIR
CONDITIONING
Heater and Ventilation
Air Conditioning
STEERING, SUSPENSION,
WHEELS AND TIRES
Front End Alignment
Power Steering (P / S) System
Steering Wheel and Column
(Not Equipped with Air Bag)
Air Bag Steering Wheel
and Column
Front Suspension
Rear Suspension
Wheel and Tires
1A
3A 0A
1B
3B1
3C
3C1
3D
3E
3F36A16
6A2
6A4
6B
6C
6E1
6E2
6F1
DRIVE SHAFT / PROP. SHAFT
Front Drive Shaft / Shaft
Bearing, Oil Seal
Propeller Shaft
BRAKES
Brake Pipe / Hose / Master
Cylinder
Front Brakes
Parking and Rear Brakes
Antilock Brake System
4A2
4B
5
5A
5B
5C
5E1
6F2
6G
6G1
6H
6K
7A
7A1
7B1
7C1
7D
7E
7F
8
8A
8B
8C
8D
8G
9
10
10A
10B
6-1
NOTE:
The screen toned Sections 6 ± 6K are included in Volume 2 and Section 8A is in Wiring
Diagram Manual.
YH4
GRAND
VITARA
1. Front differential housing
2. Rear axle
housing
When using floor jack:
Front
Rear
1. Safety stands
0A-20 GENERAL INFORMATION
In raising front or rear vehicle end off the floor by jacking, be sure
to put the jack against the center portion of the front suspension
frame or rear axle housing.
WARNING:
Never apply jack against suspension parts (i.e., stabilizer,
etc.) or vehicle floor, or it may get deformed.
If the vehicle to be jacked up only at the front or rear end,
be sure to block the wheels on ground in order to ensure
safety.
After the vehicle is jacked up, be sure to support it on
stands. It is extremely dangerous to do any work on the
vehicle raised on jack alone.
To perform service with either front or rear vehicle end jacked up,
be sure to place safety stands under chassis frame so that body is
securely supported. And then check to ensure that chassis frame
does not slide on safety stands and the vehicle is held stable for
safety's sake.
YH4
GRAND
VITARA
0B-18 MAINTENANCE AND LUBRICATION
ITEM 6-8
Suspension System Inspection
Check suspension bolts and nuts for tightness and retighten them
as necessary.
Repair or replace defective parts, if any.
NOTE:
For details of check points, refer to tables of Tightening Torque
Specification in Section 3D and 3E.
Front
1) Check stabilizer bar for damage or deformation.
2) Check bushing for damage, wear or deterioration.
3) Inspect strut for damage, deformation, oil leakage and opera-
tion. If strut is found faulty, replace it as an assembly unit, be-
cause it can not be disassembled.
Refer to strut check Section 3D for operation check.
4) Inspect strut boot for damage or crack.
5) Inspect for cracks or deformation in spring seat.
6) Inspect for deterioration of bump stopper.
7) Inspect strut mount for wear, cracks or deformation.
8) Check ball joint stud dust seal (boot) for leaks, detachment,
tear or other damage. Check suspension arm bushing for dam-
age, wear or deterioration.
Rear
9) Check shock absorber for damage, deformation, oil leakage
and operation.
10) Check bushings for wear and damage.
YH4
GRAND
VITARA
MAINTENANCE AND LUBRICATION 0B-19
11) Check coil spring, upper rod, lower rod and lateral rod for de-
formation and damage.
12) Check upper rod, lower rod and lateral rod bushings and bump
stopper for wear, damage and deterioration.
13) Check other suspension parts for damage, loose or missing
parts; also for parts showing signs of wear or lack of lubrication.
Replace any parts found defective in steps 1) to 13).
ITEM 6-9
Propeller Shafts and Drive Shafts Inspection
1) Check universal joint and spline of propeller shaft for rattle. If
rattle is found, replace defective part with a new one.
2) Check propeller shaft (front & rear) flange yoke bolts for tight-
ness, and retighten them as necessary.
Refer to Section 4B for tightening torque.
3) Check drive axle boots (wheel side and differential side) for
leaks, detachment, tear or other damage.
Replace boot as necessary.
YH4
GRAND
VITARA
3
STEERING, SUSPENSION, WHEELS AND TIRES 3-1
GENERAL DIAGNOSIS3-1 . . . . . . . . . . . . . . . . .
Diagnosis Table 3-1. . . . . . . . . . . . . . . . . . . . . .
TIRE DIAGNOSIS3-6 . . . . . . . . . . . . . . . . . . . . . .
Irregular and / or Premature Wear 3-6. . . . . . .
Wear Indicator 3-6. . . . . . . . . . . . . . . . . . . . . . . Radial Tire Waddle 3-6. . . . . . . . . . . . . . . . . . .
Radial Tire Lead 3-8. . . . . . . . . . . . . . . . . . . . . .
VIBRATION DIAGNOSIS3-8 . . . . . . . . . . . . . . .
SECTION 3
STEERING, SUSPENSION, WHEELS AND TIRES
DIAGNOSIS3-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT END ALIGNMENT3A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
POWER STEERING SYSTEM3B1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR BAG STEERING WHEEL AND COLUMN3C1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT SUSPENSION3D-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REAR SUSPENSION3E-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WHEELS AND TIRES3F-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTENTS
GENERAL DIAGNOSIS
Since the problems in steering, suspension, wheels and tires involve several systems, they must all be considered
when diagnosing a complaint. To avoid using the wrong symptom, always road test the vehicle first.
Proceed with the following preliminary inspections and correct any defects which are found.
1) Inspect tires for proper pressure and uneven wear.
2) Raise vehicle on a hoist and inspect front and rear suspension and steering system for loose or damaged parts.
3) Spin front wheel. Inspect for out-of-round tires, out-of-balance tires, bent rims, loose and / or rough wheel bear-
ings.
DIAGNOSIS TABLE
ConditionPossible CauseCorrection
Vehicle Pulls (Leads)Mismatched or uneven tires.
Tires not adequately inflated.
Broken or sagging springs.
Radial tire lateral force.
Disturbed front end alignment.
Disturbed rear axle alignment.
Brake dragging in one road wheel.
Loose, bent or broken front or rear
suspension parts.Replace tire.
Adjust tire pressure.
Replace spring.
Replace tire.
Check front end alignment.
Check rear axle alignment.
Repair front brake.
Tighten or replace suspension part.
YH4
GRAND
VITARA
3-4 STEERING, SUSPENSION, WHEELS AND TIRES
ConditionPossible CauseCorrection
Wander or Poor
Steering StabilityMismatched or uneven tires.
Loose ball joints and tie rod
ends.
Faulty shock absorbers / struts or
mounting.
Loose stabilizer bar.
Broken or sagging springs.
Rack and pinion not properly adjusted.
(if equipped with manual steering
gear case)
Disturbed front end alignment.Replace tire or inflate tires to
proper pressure.
Replace suspension control arm or
tie rod end.
Replace absorber / strut or repair
mounting.
Tighten or replace stabilizer bar or
bushes.
Replace spring.
Check or adjust rack and pinion
torque.
Check and adjust front end alignment.
Erratic Steering when
BrakingWorn wheel bearings.
Broken or sagging springs.
Leaking wheel cylinder or caliper.
Warped discs.
Badly worn brake linings.
Drum is out of round in some brakes.
Wheel tires are inflated unequally.
Defective wheel cylinders.
Disturbed front end alignment.Replace wheel bearing.
Replace spring.
Repair or replace wheel cylinder or
caliper.
Replace brake disc.
Replace brake shoe lining.
Replace brake drum.
Inflate tires to proper pressure.
Replace or repair wheel cylinder.
Check front end alignment.
Low or Uneven Trim
Height
Right-to-left trim height
(H) difference should be
within 15 mm (0.6 in.)
with curb weight.
*Same with rear side.Broken or sagging springs.
Overloaded.
Incorrect springs.Replace spring.
Check loading.
Replace spring.
Ride Too SoftFaulty shock absorber or struts.Replace shock absorber or strut.
Suspension BottomsOverloaded.
Faulty shocks or struts.
Incorrect broken or sagging springs.Check loading.
Replace shock absorber or strut.
Replace spring.
YH4
GRAND
VITARA
[A]
[B]
Hard Cornering
Under-Inflation
Lack of RotationIncorrect Wheel Alignment
Tire Construction Non-Uniformity
Wheel Heavy Acceleration [A] [B]
3-6 STEERING, SUSPENSION, WHEELS AND TIRES
TIRE DIAGNOSIS
IRREGULAR AND / OR PREMATURE WEAR
Irregular and premature wear has many possible causes. Some of
them are: incorrect inflation pressures, lack of tire rotation, driving
habits, improper alignment.
If the following conditions are noted, rotation is in order:
1. Front tire wear is different from rear.
2. Uneven wear exists across the tread of any tire.
3. Left front and right front tire wear is unequal.
4. Left rear and right rear tire wear is unequal.
5. There is cupping, flat spotting, etc.
A wheel alignment check is in order if the following conditions are
noted:
1. Left front and right front tire wear is unequal.
2. Wear is uneven across the tread of any front tire.
3. Front tire treads have scuffed appearance with ªfeatherº edges
on one side of tread ribs or blocks.
WEAR INDICATOR
The original equipment tires have built-in tread wear indicators to
show when tires need replacement. These indicators will appear as
12 mm (0.47 in.) wide bands when the tire tread depth becomes 1.6
mm (0.063 in.). When the indicators appear in 3 or more grooves
at 6 locations, tire replacement is recommended.
RADIAL TIRE WADDLE
Waddle is side to side movement at the front and / or rear of the ve-
hicle. It is caused by the steel belt not being straight within the tire.
It is most noticeable at low speed, 8 to 48 km / h (5 to 30 mph). It is
possible to road test a vehicle and tell on which end of the vehicle
the faulty tire is located. If the waddle tire is on the rear, the rear end
of the vehicle will shake from side to side or ªwaddleº. From the driv-
er's seat it feels as though someone is pushing on the side of the
vehicle. If the faulty tire is on the front, the waddle is more visual.
The front sheet metal appears to be moving back and forth and the
driver feels as though he is at the pivot point in the vehicle.
Waddle can be quickly diagnosed by using a Tire Problem Detector
(TPD) and following the equipment manufacturer's recommenda-
tions.
If a TPD is not available, the more time consuming method of sub-
stituting known good tire / wheel assemblies on the problem vehicle
can be used as follows:
YH4
GRAND
VITARA
INFLATE TIRES TO
RECOMMENDED PRESSURE
ROAD TEST VEHICLE ON LEVEL
UNCROWNED ROAD IN
BOTH DIRECTIONS
SWITCH FRONT TIRES
SIDE TO SIDE AND
ROAD TEST AGAIN
LEADS IN SAME
DIRECTIONLEAD CORRECTED
IF ROUGHNESS RESULTS,
REPLACE TIRESLEAD REVERSES
DIRECTION
PUT TIRES BACK IN
ORIGINAL POSITION
AND CHECK ALIGNMENTINSTALL A KNOWN GOOD TIRE ON
ONE FRONT SIDE
LEAD CORRECTED
REPLACE TIRELEAD REMAINS
INSTALL A KNOWN GOOD TIRE IN
PLACE OF OTHER FRONT TIRE
LEAD CORRECTED
REPLACE TIRELEAD REMAINS
KNOWN GOOD TIRES ARE NOT GOOD
STEERING, SUSPENSION, WHEELS AND TIRES 3-7
1. Ride vehicle to determine if the waddle is coming from the front
or rear.
2. Install tires and wheels that are known to be good (on similar ve-
hicle) in place of those on the offending end of the vehicle. If the
waddle cannot be isolated to front or rear, substitute the rears.
3. Road test again. If improvement is noted, install originals one at
a time until offender is found. If no improvement is noted, install
known good tires in place of all four. Then install originals one
at a time until offender if found.