axle SUZUKI GRAND VITARA 2003 2.G Service Repair Manual

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GRAND
VITARA
5E1-24 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
INSPECTION
STEPACTIONYESNO
11) Disconnect the applicable sensor connector with
ignition switch OFF.
2) Measure resistance between sensor terminals.
Resistance of wheel speed sensor:
1.2 ± 1.6 k
(at 20C, 68F)
3) Measure resistance between each terminal and
body ground.
Insulation resistance: 1M
or higher
Were measured resistance values in step 2) and 3)
as specified? (See Fig. 1)Go to step 2.Replace sensor.
21) Ignition switch OFF.
2) Disconnect connector from ABS hydraulic
unit / control module assembly. (See Fig. 2)
3) Check for proper connection to ABS hydraulic unit /
control 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 0 V?Go to step 3.Sensor positive
circuit shorted to
power.
31) Ignition switch OFF.
2) Connect connector to sensor.
3) Measure resistance between sensor terminals at
module 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?Go to step 4.Circuit open or
shorted to
ground.
41) Remove wheel speed sensor.
2) Check sensor for damage or foreign material being
attached.
Is it in good condition? (See Fig. 3)Go to step 5.Clean or replace
sensor.
5Check visually through wheel speed sensor
installation hole for following.

Rotor neither missing or damaged.

No foreign material being attached.

Rotor not being eccentric.

Wheel bearing free from excessive play.
Are they in good condition? (See Fig. 4)Go to step 6.Clean, repair or
replace.
61) 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 Fig. 5)
Replace sensor if any.
Referring to item OUTPUT VOLTAGE INSPECTION of
FRONT WHEEL SPEED SENSOR, check output voltage
or waveform of sensor. Is proper output voltage or
waveform obtained?Substitute a
known-good ABS
hydraulic unit /
control module
assembly and
recheck.Replace sensor
and recheck.

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VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-37
1. Rear wheel speed sensor
2. Sensor rotor
3. Rear axle housing
1. Rear wheel speed
sensor harness
2. Connector
1. Sensor bolt
2. Clamps
REAR WHEEL SPEED SENSOR
OUTPUT VOLTAGE INSPECTION
Check in the same procedure as that used of front wheel speed
sensor check.
Output AC voltage at 2 / 3 to
one rotation per second (25 ± 38 Hz): 106 mV or more
Reference
When using oscilloscope,
peak-to-peak voltage at 2 / 3 to
one rotation per second (25 ± 38 Hz): 150 mV or more
REMOVAL
1) Disconnect negative cable at battery.
2) Hoist vehicle.
3) Disconnect rear wheel speed sensor connector and detach wire
harness from vehicle body and rear axle.
4) Remove harness clamps and remove rear wheel speed sensor
from rear axle.
CAUTION:

Do not pull wire harness when removing rear wheel
speed sensor.

Do not cause damage to surface of rear wheel speed
sensor and do not allow dust, etc. to enter its installa-
tion hole.

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VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-39
1. Rear axle
2. Retainer ring
3. Sensor rotor
4. Vinyl envelope
ªAº Grind with grinderªAº
1. Sensor rotor 4
31
2
2 1
3
REAR SENSOR ROTOR
REMOVAL
1) Remove rear axle shaft. Refer to REAR AXLE SHAFT RE-
MOVAL in Section 3E.
2) In order to remove sensor rotor from retainer ring, grind with a
grinder one part of the sensor rotor as illustrated till it becomes
thin.
CAUTION:

Cover vinyl sheet or the like over wheel bearing so that
fine grains from grinding will not enter there.

Be careful not to go so far as to grind the retainer ring.
3) Break with a chisel the thin ground sensor rotor, and it can be re-
moved.
INSTALLATION
1) Press-fit sensor rotor as shown.
NOTE:
Use care not to cause any damage to outside of retainer
ring.
2) Install rear axle shaft. Refer to REAR AXLE SHAFT INSTALLA-
TION in Section 3E.

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VITARA
7E
DIFFERENTIAL (FRONT) 7E-1
The differential assembly using a hypoid bevel pinion
and gear is installed to the front axle.
4WD control system controls drive force to be trans-
mitted to front axles or not. The reduction ratio varies
depending on transmission or engine type.The differential assembly is decisive in that the drive
power is concentrated there. Therefore, use of genu-
ine parts and specified torque is compulsory. Further,
because of sliding tooth meshing with high pressure
between bevel pinion and gear, it is mandatory to lu-
bricate them by hypoid gear oil.
SECTION 7E
DIFFERENTIAL (FRONT)
CONTENTS
GENERAL DESCRIPTION7E- 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4WD CONTROL SYSTEM7E- 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSIS7E- 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSIS TABLE7E- 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Assembly7E- 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4WD Control System Diagnostic Flow Table 7E- 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4WD CONTROL CIRCUIT INSPECTION 7E- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE7E- 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE SERVICE7E- 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear Oil Change7E- 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSPECTION7E-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4WD Control System7E-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator7E-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Pump Assembly7E-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION 7E-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Mountings7E-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISMOUNTING7E-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOUNTING7E-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNIT REPAIR7E-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUE SPECIFICATIONS7E-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REQUIRED SERVICE MATERIAL7E-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS7E-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION

YH4
GRAND
VITARA
1. 4WD switch
2. Transfer
3. Blank
4. Blank
5. ECM or PCM
6. Glove box7. Air pump assembly
8. Actuator
9. Axle lock clutch
10. Free axle hub
11. 4WD indicator lamp
7E-2 DIFFERENTIAL (FRONT)
4WD CONTROL SYSTEM
When the 4WD switch is turned ON by shifting the transfer shift lever, ECM (PCM) (G16 and J20 engine models)
or 4WD controller (H25 engine model) actuates (energizes) the air pump assembly. Then positive pressure is sent
from the air pump assembly to the actuator installed to the differential case and causes the axle lock clutch and
the free axle hub in the differential case to be engaged, resulting in the 4WD mode. Only when running in the 4WD
mode, front axles are joined to differential case, and they become free when 2WD mode is used (or when transfer
shift lever is shifted to N position), thereby reducing the power loss.

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VITARA
7E-4 DIFFERENTIAL (FRONT)
Components and Functions
ComponentFunction
4WD switch
When the transfer shift lever is shifted to 4L or 4H position, this switch turns ON
and causes the 4WD control system to turn ON, unless it is shifted to N or 2H
within 1 second.
ECM or PCM
When the 4WD switch turns ON [unless it turns OFF within 1 second], this com-
ponent actuates the pump assembly. If the pressure in the air pump assembly
fails to increase higher than the set level even after the pump motor has run more
than 10 seconds, this component stops the motor to protect it.
Air pump assembly

Pump motor

Release valve

Pressure switchThe air pump assembly consists of a pump motor, release valve and a pressure
switch.
Pump motor:
Produces positive pressure which actuates the actuator.
Release valve:
Closes when transfer shift lever is shifted to 4H or 4L so that the positive pressure
is applied to the actuator, and opens when N or 2H to release the pressure to the
atmosphere.
Pressure switch:
Turns ON and OFF depending on the pressure level in the pump assembly
(whether higher or lower than the set pressure level). ECM or PCM detects the
pressure level through this switch.
Differential case assembly

Free axle hub

Axle lock clutch

ActuatorThe free axle hub, axle lock clutch and actuator are installed in the differential
left case. The positive pressure produced in the air pump assembly is applied
to the actuator which then pushes the axle lock clutch to be engaged with the free
axle hub. In this state, the drive force is transmitted to the front axle, resulting in
the 4WD mode.
When the actuator is free from the positive pressure [when it is under the atmo-
spheric pressure], the axle lock clutch is pushed back by the return spring force
and cannot be engaged with the free axle hub, resulting in the 2WD mode.
ª4WDº indicator lampIt lights up when 4WD control system is in the 4WD mode.

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GRAND
VITARA
DIFFERENTIAL (FRONT) 7E-5
DIAGNOSIS
DIAGNOSIS TABLE
Differential Assembly
ConditionPossible CauseCorrection
Gear noise
Deteriorated or water mixed lubricant

Inadequate or insufficient lubricant

Maladjusted backlash between bevel
pinion and gear

Improper tooth contact in the mesh between
bevel pinion and gear

Loose bevel gear securing bolts

Damaged side gear(s) or side pinion(s)Repair and replenish
Repair and replenish
Adjust
Adjust or replace
Replace or retighten
Replace
Bearing noise
(Constant noise) Deteriorated or water
mixed lubricant

(Constant noise) Inadequate or insufficient
lubricant

(Noise while coasting) Damaged bearing(s)
of bevel pinion

(Noise while turning) Damaged diff. side
bearing(s) or axle bearing(s)Repair and replenish
Repair and replenish
Replace
Replace
Oil leakage
Worn or damaged oil seal

Excessive oil

Loose differential carrier boltsReplace
Adjust oil level
Replace or retighten
2WD / 4WD
switching error
Defective actuator

Abnormality in 4WD control systemReplace
Inspect referring to ª4WD
CONTROL SYSTEM DIAG-
NOSTIC FLOW TABLEº.
4WD Control System Diagnostic Flow Table
Before performing the trouble diagnosis, check that the transfer and front differential are in good condition and
there is no air leakage from air hoses and the actuator. Refer to ªON-VEHICLE SERVICEº in this section for air
leakage.
[NOTES ON SYSTEM CIRCUIT INSPECTION]

Be sure to read ªPrecautions for Electrical Circuit Serviceº in Section 0A before circuit inspection and observe
what is written there.

For system circuit, refer to the figure of ªGENERAL DESCRIPTIONº in this section.

For terminal arrangement, refer to ª4WD Control Circuit Inspectionº in this section.

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VITARA
7F
DIFFERENTIAL (REAR) 7F-1
The differential assembly is decisive in that the drive
power is concentrated there. Therefore, use of genu-
ine parts and specified torque is compulsory. Further,
because of sliding tooth meshing with high pressure
between bevel pinion and gear, it is mandatory to lu-
bricate them by hypoid gear oil.
SECTION 7F
DIFFERENTIAL (REAR)
CONTENTS
GENERAL DESCRIPTION7F-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSIS7F-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE7F-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Service7F-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dismounting7F-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remounting7F-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNIT REPAIR7F-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUE SPECIFICATIONS7F-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REQUIRED SERVICE MATERIALS7F-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION
The differential assembly using a hypoid bevel pinion
and gear is installed to the rear axle. It is set in the con-
ventional type axle housing.
The reduction ratio and differential case vary depend-
ing on transmission or engine type.

YH4
GRAND
VITARA
7F-2 DIFFERENTIAL (REAR)
DIAGNOSIS
ConditionPossible CauseCorrection
Gear noise
Deteriorated or water mixed lubricant

Inadequate or insufficient lubricant

Maladjusted backlash between bevel
pinion and gear

Improper tooth contact in the mesh between
bevel pinion and gear

Loose bevel gear securing bolts

Damaged side gear(s) or side pinion(s)Repair and replenish
Repair and replenish
Adjust as prescribed
Adjust or replace
Replace or retighten
Replace
Bearing noise
(Constant noise) Deteriorated or water
mixed lubricant

(Constant noise) Inadequate or insufficient
lubricant

(Noise while coasting) Damaged bearing(s)
of bevel pinion

(Noise while turning) Damaged diff. side
bearing(s) or axle bearing(s)Repair and replenish
Repair and replenish
Replace
Replace
Oil leakage
Clogged breather plug

Worn or damaged oil seal

Excessive oilClean
Replace
Adjust oil level

YH4
GRAND
VITARA
1. Match mark
1. Differential to rear axle nut
7F-4 DIFFERENTIAL (REAR)
DISMOUNTING
1) Lift up vehicle and drain oil from rear differential housing.
2) Remove rear brake drums and pull out right and left rear axle
shafts. (Refer to rear axle shaft removal of SECTION 3E.)
3) Before removing propeller shaft, give match marks on joint
flange and propeller shaft as shown.
4) Remove propeller shaft by removing its 4 flange bolts and nuts.
5) Remove differential assembly by removing its 8 fastening nuts.