ISUZU TROOPER 1998 Service Repair Manual

SERVICE INFORMATION 00 – 9
Problem Possible Cause Correction
STEERING COLUMN
LOCK SYSTEM
Will Not Unlock
Will Not Lock
Key Cannot Be Removed
in “OFF-LOCK”1. Damaged lock cylinder.
2. Damaged sector.
3. Damaged park lock cable.
1. Lock spring broken or worn.
2. Damaged lock cylinder.
3. Ignition switch stuck.
4. Park lock cable damaged.
1. Ignition switch is not set correctly.
2. Damaged lock cylinder.
3. Faulty shift lock mechanism.Replace lock cylinder.
Replace lock cylinder.
Replace park lock cable.
Replace lock cylinder.
Replace lock cylinder.
Repair or replace ignition
switch.
Replace park lock cable.
Correct ignition switch.
Replace lock cylinder.
Repair or replace the shift lock
mechanism.
Problem Possible Cause Correction
COLUMN
Noise in Column1. Universal joint loose.
2. Shaft lock snap ring not seated.Tighten joint.
Place snap ring in proper
position.

00 – 10 SERVICE INFORMATION
Problem Possible Cause Correction
STEERING COLUMN (CONT.)
TURN SIGNAL SWITCH
This troubleshooting covers mechanical problems only. See Section 8 for turn signal switch electrical
diagnosis.
Turn Signal Will Not Stay
in Turn Position
Turn Signal Will Not
Cancel
Turn Signal Difficult to
Operate
Turn Signal Will Not
Indicate Lane Change
Hezard Switch Cannot Be
Turned Off
No Turn Signal Lights
Front or Rear Turn Signal
Lights Not Flashing1. Foreign material or loose parts
preventing movement of yoke.
2. Broken or missing detent or canceling
spring.
1. Loose switch mounting screws.
2. Switch or anchor bosses broken.
3. Broken, missing or out of position
detent, return or canceling spring.
4. Worn canceling cam.
1. Turn signal switch arm loose.
2. Yoke broken or distorted.
3. Loose or misplaced springs.
4. Foreign parts and/or material.
5. Loose turn signal switch mounting
screws.
1. Broken lane change pressure pad or
spring hanger.
2. Broken, missing or misplaced lane
change spring.
3. Base of wire damaged.
1. Foreign material between hazard
switch to turn signal switch body.
1. Electrical failure in chassis harness.
2. Inoperative turn signal flasher unit.
3. Loose chassis harness connector.
1. Burned-out damaged turn signal bulb.
2. High resistance connection to ground
at bulb socket.
3. Loose chassis harness connector.Repair or replace signal switch.
Replace signal switch.
Tighten mounting screws.
Replace turn signal switch.
Replace turn signal switch.
Replace turn signal switch.
Tighten arm screw.
Replace turn signal switch.
Replace turn signal switch.
Repair turn signal switch.
Tighten mounting screws.
Replace turn signal switch.
Replace turn signal switch.
Replace turn signal switch.
Repair or replace hazard
switch.
Refer to Section 8 “Electrical
Troubleshooting”.
Replace flasher unit.
Repair loose connector.
Replace bulb.
Repair bulb socket.
Repair loose connector.

SERVICE INFORMATION 00 – 11
MAIN DATA AND SPECIFICATIONS
FRONT END ALIGNMENT
Caster 2° 10' ± 45'
Camber 0° ± 30'
King pin inclination 12° 30' ± 30'
Toe-in mm (in) 0 ± 2 (0 ± 0.08)
Max. steering angle (inside) 34°+0°
(outside) 32°
+0°
–2°
POWER STEERING
Steering gear
Type Integral, ball screw
Gear ratio 16.3 : 1
Oil pump
Type Vane
Operating fluid ATF DEXRON
®- ˜E or™

00 – 12 SERVICE INFORMATION
Items Service Standard Service Limit
SERVICE STANDARD
POWER STEERING GEAR
Sector shaft outside diameter mm (in)
POWER STEERING PUMP
Fluid pressure
(When the engine is normal operating
temperature, increase engine speed to
1500rpm.) kpa (kg/cm
2/psi)
STEERING WHEEL
Free play mm (in)32.0 (1.26)
9300 – 9800
6VD1
(95 – 100 / 1350 – 1420)
(6VE1)
9800 – 10300
4JG2
(100 – 105 / 1420 – 1490)
(4JX1)
0 – 30 (0 – 1.18)31.7 (1.25)
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SERVICE INFORMATION 00 – 13
STEERING
INSPECTION
Visual check
Check the following parts:
• Oil leakage.
• Steering system for looseness or damage.
• Steering function
• Joint ball for oil leakage or damage.
• Joint ball rubber boot for damage.
MAINTENANCE
The hydraulic system should be kept clean and fluid level
in the reservoir should be checked at regular intervals and
fluid added when required. Refer to "MAINTENANCE AND
LUBRICATION" in section 0B of the manual for type of
fluid to be used and intervals for filling.
If the system contains some dirt, flush it as detailed later
in this section. If it is exceptionally dirty, both the pump
and the gear must be completely disassembled before
further usage.
All tubes, hoses, and fittings should be inspected for
leakage at regular intervals. Fittings must be tight. Make
sure the clips, clamps and supporting tubes and hoses are
in place and properly secured.
Power steering hoses and lines must not be twisted,
kinked or tightly bent. Air in the system will cause spongy
action and noisy operation. When a hose is disconnected
or when fluid is lost, for any reason, the system must be
bled after refilling. Refer to "Bleeding the Power Steering
System" in this section.
FLUID LEVEL
1. Run the engine until the power steering fluid reaches
normal operating temperature, about 55°C (130°F),
then shut the engine off.
2. Check the level of fluid in the reservoir.
3. If the fluid level is low, add power steering fluid as
specified in "MAINTENANCE AND LUBRICATION" in
section 0B to the proper level and install the receiver
cap.
4. When checking the fluid level after the steering
system has been serviced, air must be bled from the
system. Refer to "Bleeding the Power Steering
System" in this section.
SERVICING

00 – 14 SERVICE INFORMATION
STEERING WHEEL FREE PLAY
ADJUSTMENT
INSPECTION
1. Check the amount of steering wheel play by turning
the wheel in both directions until the tires begin to
move with the front wheels properly in the straight
ahead position.
NOTE:
The wheel free play should be checked with the engine
running.
Steering Wheel Free Play mm (in)
0 – 30 (0 – 1.18)
2. Also check the steering wheel for play and looseness
in mount by moving it back and froth and sideways.
While driving, check for hard-steering, steering
shimmy and tendency to pull to one side.
ADJUSTMENT
1. Align the front wheels properly in the straight ahead
position.
2. Loosen the lock nut on the adjusting screw of the
steering gear.
3. Turn the adjust screw clockwise to decrease free play
or counter-clockwise to increase.
4. After check of specified free play, tighten the lock nut
to specified torque.
Lock Nut Torque N·m (kg·m/lb·ft)
41 (4.2 / 30)

SERVICE INFORMATION 00 – 15
FIXING TORQUE
Power Steering N·m (kg·m/lb·ft)
46(4.7/34)
54(5.5/40)17.6(1.8/12.8)
74(7.5/54) 15.7(1.6/11.5) 78(8.0/58)
46(4.7/34)
46(4.7/34)
20(2.0/14)
E03RW015

00 – 16 SERVICE INFORMATION
Power Steering (Cont.) N·m (kg·m/lb·ft)

24(2.4/17)
9.8(1.0/7.1)
59(6.0/43)
54(5.5/40)
22(2.2/16)
E03RW011
These illustrations are based on the LHD model.

SERVICE INFORMATION 00 – 17
Steering Linkage N·m (kg·m/lb·ft)
These illustrations are based on the LHD model.

00 – 18 SERVICE INFORMATION
Steering Column N·m (kg·m/lb·ft)
25 (2.5/18)
8 (0.8/69 lb·in)
34 (3.5/25)
19 (1.9/14)
17 (1.7/12)
This illustration is based on the LHD model.
E03RW010
This illustration is based on the LHD model.
This illustration is based on the LHD model.