Jeep Wrangler TJ. Manual — part 536
Under deceleration conditions, the PCM adjusts
the Idle Air Control (IAC) motor to maintain a
desired MAP value. Under idle conditions, the PCM
adjusts the IAC motor to maintain a desired engine
speed.
REMOVAL
The Vehicle Speed Sensor (VSS) is located in the
transfer case rear extension.
(1) Raise and support vehicle.
(2) Disconnect electrical connector from sensor by
pushing slide tab. After slide tab has been positioned,
push in on secondary release lock on side of connec-
tor and pull connector from sensor.
(3) Remove sensor mounting bolt.
(4) Remove sensor (pull straight out) from rear
extension.
INSTALLATION
(1) Install sensor into transfer case rear extension
and install mounting bolt. Before tightening bolt, ver-
ify speed sensor is fully seated (mounted flush) to
rear extension.
(2) Tighten sensor mounting bolt to 11-16 N·m
(8-12 ft. lbs.) torque.
(3) Connect electrical connector to sensor.
21 - 234
TRANSFER CASE - NV241
TJ
VEHICLE SPEED SENSOR (Continued)
TIRES/WHEELS
TABLE OF CONTENTS
page
page
TIRES/WHEELS
DIAGNOSIS AND TESTING - TIRE AND
. . . . . . . . . . . . . . . . . . . . . . 1
MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
WHEEL BALANCE . . . . . . . . . . . . . . . . . . . . . . 4
TIRES
. . . . . . . . . . . . . . . . . . 5
DESCRIPTION - RADIAL-PLY TIRES
PRESSURES . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DESCRIPTION - TIRE PRESSURE FOR
HIGH SPEED . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DESCRIPTION - REPLACEMENT TIRES
DIAGNOSIS AND TESTING - PRESSURE
GAUGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING - TREAD WEAR
INDICATORS . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING - TIRE WEAR
PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING - TIRE NOISE
OR VIBRATION . . . . . . . . . . . . . . . . . . . . . . . . 8
DIAGNOSIS AND TESTING - TIRE/VEHICLE
LEAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
STANDARD PROCEDURE - REPAIRING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SPARE TIRE
DESCRIPTION - FULL SIZE, SPARE WHEEL
WITH MATCHING TIRE . . . . . . . . . . . . . . . . . 10
SPARE TIRE CARRIER
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . . . . . . . . 11
WHEELS
. . . . . . . . . . . . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . . . . . . . . 12
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 12
REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . 13
STUDS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . . 13
TIRES/WHEELS
DIAGNOSIS AND TESTING - TIRE AND WHEEL
RUNOUT
Radial runout is the difference between the high
and low points on the tire or wheel (Fig. 1).
Lateral runout is the wobble of the tire or wheel.
Radial runout of more than 1.5 mm (.060 inch)
measured at the center line of the tread may cause
the vehicle to shake.
Lateral runout of more than 2.0 mm (.080 inch)
measured near the shoulder of the tire may cause the
vehicle to shake.
Sometimes radial runout can be reduced. Relocate
the wheel and tire assembly on the mounting studs
(See Method 1). If this does not reduce runout to an
acceptable level, the tire can be rotated on the wheel.
(See Method 2).
METHOD 1 (RELOCATE WHEEL ON HUB)
(1) Drive vehicle a short distance to eliminate tire
flat spotting from a parked position.
(2) Check wheel bearings and adjust if adjustable
or replace if necessary.
(3) Check the wheel mounting surface.
(4) Relocate wheel on the mounting, two studs
over from the original position.
(5) Tighten wheel nuts until all are properly
torqued, to eliminate brake distortion.
(6) Check radial runout. If still excessive, mark
tire sidewall, wheel, and stud at point of maximum
runout and proceed to Method 2.
METHOD 2 (RELOCATE TIRE ON WHEEL)
NOTE: Rotating the tire on wheel is particularly
effective when there is runout in both tire and
wheel.
TJ
TIRES/WHEELS
22 - 1
(1) Remove tire from wheel and mount wheel on
service dynamic balance machine.
(2) Check wheel radial runout (Fig. 2) and lateral
runout (Fig. 3).
• STEEL WHEELS: Radial runout 0.040 in., Lat-
eral runout 0.045 in. (average-maximum)
• ALUMINUM WHEELS: Radial runout 0.030 in.,
Lateral runout 0.035 in. (average-maximum)
(3) If point of greatest wheel lateral runout is near
original chalk mark, remount tire 180 degrees.
Recheck runout or match mount, (Refer to 22 -
TIRES/WHEELS - STANDARD PROCEDURE).
STANDARD PROCEDURE
STANDARD PROCEDURE - ROTATION
Tires on the front and rear operate at different
loads and perform different steering, driving, and
braking functions. For these reasons they wear at
unequal rates and tend to develop irregular wear
patterns. These effects can be reduced by rotating
the tires at regular intervals. The benefits of tire
rotation are:
• Increase tread life
• Maintain traction levels
• A smooth, quiet ride
The suggested method of tire rotation is (Fig. 4).
Other rotation methods can be used, but they will
not provide all the tire longevity benefits.
Fig. 1 Checking Tire/Wheel/Hub Runout
1 - RADIAL RUNOUT
2 - LATERAL RUNOUT
Fig. 2 RADIAL RUNOUT
1 - DIAL INDICATORS
2 - MOUNTING CONE
3 - SPINDLE SHAFT
4 - WING NUT
5 - PLASTIC CUP
6 - WHEEL
Fig. 3 LATERAL RUNOUT
1 - DIAL INDICATORS
2 - MOUNTING CONE
3 - SPINDLE SHAFT
4 - WING NUT
5 - PLASTIC CUP
6 - WHEEL
Fig. 4 Tire Rotation Pattern
22 - 2
TIRES/WHEELS
TJ
TIRES/WHEELS (Continued)
STANDARD PROCEDURE - MATCH MOUNTING
Tires and wheels are currently match mounted at
the factory. Match mounting is a technique used to
reduce runout in the wheel/tire assembly. This means
that the high spot of the tire is aligned with the low
spot on the wheel rim. The high spot on the tire is
marked with a paint mark or a bright colored adhe-
sive label on the outboard sidewall. The low spot on
the rim is identified with a label on the outside of the
rim and a dot on the inside of the rim. If the outside
label has been removed the tire will have to be
removed to locate the dot on the inside of the rim.
Before dismounting a tire from its wheel, a refer-
ence mark should be placed on the tire at the valve
stem location. This reference will ensure that it is
remounted in the original position on the wheel.
(1) Use a dial indicator to locate the high spot of
the tire on the center tread rib (Fig. 5). Record the
indicator reading and mark the high spot on the tire.
Place a mark on the tire at the valve stem location
(Fig. 6).
(2) Break down the tire and remount it 180
degrees on the rim (Fig. 7).
(3) Measure the total runout again and mark the
tire to indicate the high spot.
(4) If runout is still excessive use the following
procedures.
(a) If the high spot is within 101.6 mm (4.0 in.)
of the first spot and is still excessive, replace the
tire.
(b) If the high spot is within 101.6 mm (4.0 in.)
of the first spot on the wheel, the wheel may be out
of specifications. (Refer to 22 - TIRES/WHEELS -
DIAGNOSIS AND TESTING).
(c) If the high spot is NOT within 101.6 mm (4.0
in.) of either high spot, draw an arrow on the tread
from second high spot to first. Break down the tire
and remount it 90 degrees on rim in that direction
(Fig. 8). This procedure will normally reduce the
runout to an acceptable amount.
Fig. 5 Dial Indicator
Fig. 6 First Measurement On Tire
1 - REFERENCE MARK
2 - 1ST MEASUREMENT
HIGH SPOT MARK TIRE AND RIM
3 - WHEEL
4 - VALVE STEM
Fig. 7 Remount Tire 180 Degrees
1 - VALVE STEM
2 - REFERENCE MARK
TJ
TIRES/WHEELS
22 - 3
TIRES/WHEELS (Continued)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст