tires ISUZU TROOPER 1995 Repair Manual

IGNITION SYSTEM
• CHECK: Ignition timing, using a "Scan tool".
• CHECK: Ignition system; wires, plugs, electronic
ignition, etc.
ENGINE MECHANICAL
• CHECK: Perform a cylinder compression check.
See ENGINE MECHANICAL DIAGNOSIS
(SECTION 6).
• CHECK: For correct camshaft or weak valve
springs.
ADDITIONAL CHECKS
• CHECK: Manifold absolute pressure sensor.
Refer to
CHART C-10.
• CHECK: Throttle linkage for sticking or binding.
• CHECK: Park/neutral position switch circuit. See
CHART C-1A,
or use "Scan tool" and be
sure
tool indicates vehicle is in drive with
gear selector in drive or overdrive.
DRIVEABILITY AND EMISSIONS 6E2-95
• CHECK:
• CHECK:
• CHECK:
• CHECK:
• CHECK:
• CHECK:
Idle air control operation, use CHART C-
2C.
Exhaust gas recirculation valve. There
should be no exhaust gas recirculation at
idle. Refer to CHART C-7A.
Air conditioning (A/C) signal to engine
control module, "Scan tool" should
indicate A/C is being requested when
ever
A/C is selected. If problem exists
with A/C "ON," check A/C system
operation
CHART C-10.
Positive crankcase ventilation valve for
proper operation. Refer to "Positive
Crankcase Ventilation (PCV),"
Section
"6E2-C13."
For broken motor mounts.
Generator output
voltage. Repair if less
than 9 or more than 16 volts.
POOR FUEL ECONOMY
Definition: Fuel economy, as measured by an actual
road test, is noticeably lower than
expected.
Also, fuel economy is
noticeably lower than it was on this car at
one time,
as previously shown by an actual
road test.
PRELIMINARY CHECKS
• Perform the careful visual checks as described at
start
of "Symptoms," Section "6E2-B."
• Visually (physically)
check: Vacuum hoses for
splits, kinks, and proper connections as shown on
"Vehicle Emission Control Information" label.
• Check
owner's driving habits.
Is A/C "ON" full time (Defroster mode "ON")?
Are tires at correct pressure?
Are
excessively heavy loads being carried?
Is acceleration too much, too often?
• Check air cleaner filter for dirty or being plugged.
IGNITION SYSTEM
• CHECK: Ignition timing. Refer to "Vehicle
Emission Control Information" label.
• CHECK: Spark plugs. Remove spark plugs, check
for wet plugs, cracks, wear, improper
gap, burned electrodes, or heavy
deposits. Repair or
replace as necessary.
COOLING SYSTEM
• CHECK: Engine coolant level.
• CHECK: Engine thermostat for faulty part (always
open) or for wrong heat range. Refer to
ENGINE COOLING (SECTION 68).
ENGINE MECHANICAL
• CHECK: Compression. See ENGINE MECHANICAL
DIAGNOSIS
(SECTION 6A).
ADDITION CHECKS
• CHECK:
• CHECK:
• CHECK:
• CHECK:
• CHECK:
TCC operation (A/T). Use CHART C-8. A
"Scan tool" should indicate a revolution
per minute drop, when the TCC is
commanded
"ON".
For exhaust system restriction.
For proper
calibration of speedometer.
Induction system and crankcase for air
leaks.
Fuel
injectors are correct for the vehicle.

New or service sensors will already have the
compound
applied to the threads. If a sensor is
removed
from an engine and iffor any reason it
is to be reinstalled, the threads must have anti­
seize compound
applied before reinstallation.
•
Apply anti-seize compound or equivalent to
threads of oxygen sensor if necessary.
• Tighten the oxygen sensor to the specified
torque.
1~1 Torque N·m (lb·ft) 55 (40)
1. H02S wiring connector
THROTTLE POSITION (TP) SENSOR
Fig. 6E2-59
E) REMOVAL
Preparation: • Battery negative cable.
1. Throttle Position (TP) sensor wiring connector
2. TP sensor fixing screw
3. TP sensor
I••IINSTALLATION
3. TP sensor
2. TP sensor fixing screw
• Tighten the fixing screw to the specified torque.
~~~ Torque N·m (lb·in) I 2 (18)
• Use a "Scan tool" to check TP sensor output
voltage with throttle closed, should be under
0.85 volts. If over 0.85 volts, check for binding
throttle shaft, or TP sensor lever. If all OK,
replace TP sensor.
1.
TP sensor wiring connector
DRIVEABILITY AND EMISSIONS 6E2-1 07
MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR
1. Vacuum hose
) 0~
2 .• ,.~,,~,~
conne~ JJJ
4. Sensor
Fig. 6E2-60
E) REMOVAL
Preparation: • Battery negative cable.
1. Vacuum hose
2. Electrical connector
3. Attaching screws
4. Sensor
I••IINSTALLATION
4. Sensor
3. Attaching screws
2. Electrical connector
1. Vacuum hose
VEHICLE SPEED SENSOR (VSS)
Refer to INSTRUMENT PANEL CLUSTER AND
CONSOLE of this manual for replacement of vehicle
speed sensor located in instrument panel.
POWER STEERING PRESSURE (PSP)
SWITCH
Refer to STEERING, SUSPENSION, TIRES AND
WHEELS for service of the power steering pressure
switch.
PARK/NEUTRAL
SWITCH POSITION
(PNP}
See
Section AUTOMATIC TRANSMISSION GENERAL
INFORMATION Section for park/neutral position
switch.
"On-Vehicle Service" and adjustment
procedures are
also listed there.

8 -72 CHASSIS ELECTRICAL
HEADLIGHT
E) REMOVAL (FIG. 8-87)
Preparation: Disconnect the battery ground cable.
Fig. 8-87
1. Front combination light
• Remove the screw and pull out the two pro­
jecting
portions on the fender side.
2. Radiator grille
• Remove the 5 clips and 2 screws.
3. Front end lower panel
• Remove the two screws.
4. Headlight assembly (with bracket)
• Remove the four bolts and two nuts.
5. Headlight bulb
• Refer to the headlight bulb removal steps in
this section.
6. Bracket
• Remove the two screws and two nuts.
• Remove the spring for the headlight aim
adjustment.
7. Rear cover
• Remove four screws.
8. Headlight rim
9. Headlight
E3 INSTALLATION
To install, follow the removal steps in the reverse
order.
W CAUTION:
After installing the headlight, be sure to adjust
the headlight aim.
(E AIMING OF HEADLIGHT
Preparation: Place the unloaded vehicle on a level
surface and check to see ifthe inflation pressur oft he
tires is correct, the lenses are clean, and the b ttery is
sufficiently charged.
Adjust the aim with th head­
light tester, if necessary. (fig. 8-88)
When adjusting,
follow the procedure of th tester
manufacturer's.
Fig. 8-88
1~1 .... 1 Vertical adjustment
Use a screwdriver for vertical adjustmen . (Fig.
8-89)
Fig. 8-89
m .... l Horizontal adjustment
Use a screwdriver for horizontal adjust ent.
(Fig.
8-90)
..

Supplemental Restraint System 9J-125
STEERING WHEEL
WARNING: SAFETY PRECAUTIONS MUST BE FOLLOWED WHEN HANDLING A DEPLOYED INFLATOR
MODULE(AIR BAG). AFTER DEPLOYMENT, THE INFLATOR MODULE(AIR BAG) SURFACE MAY CONTAIN A
SMALL AMOUNT OF SODIUM HYDROXIDE, A BY-PRODUCT OF THE DEPLOYMENT REACTION, THAT IS
IRRITATING TO
THE SKIN AND EYES. MOST OF THE POWDER ON THE INFLATOR MODULE (AIR BAG )IS
HARMLESS.
AS A PRECAUTION, WEAR GLOVES AND SAFETY GLASSES WHEN HANDLING A DEPLOYED
INFLATOR MODULE (AIR BAG ), AND WASH YOUR HANDS WITH MILD SOAP AND WATER AFTERWARDS.
WARNING: WHEN CARRYING A LIVE INFLATOR MODULE (AIR BAG ), MAKE SURE THE BAG AND TRIM
COVER
ARE POINTED AWAY FROM YOU. NEVER CARRY INFLATOR MODULE (AIR BAG )BY THE WIRES OR
CONNECTOR ON
THE UNDERSIDE OF MODULE. IN THE CASE OF AN ACCIDENTAL DEPLOYMENT, THE BAG
WILL THEN DEPLOY WITH MINIMAL CHANCE OF INJURY. WHEN PLACING A LIVE INFLATOR MODULE (AIR
BAG ) ON A BENCH OR OTHER SURFACE, ALWAYS FACE BAG AND TRIM COVER UP, AWAY FROM THE
SURFACE.NEVER
REST A STEERING COLUMN ASSEMBLY ON THE STEERING WHEEL WITH THE INFLATOR
MODULE (AIR BAG ) FACE DOWN AND COLUMN VERTICAL. THIS IS NECESSARY SO THAT A FREE SPACE
IS PROVIDED
TO ALLOW THE INFLATOR MODULE (AIR BAG) TO EXPAND IN THE UNLIKELY EVENT OF
ACCIDENTAL DEPLOYMENT. OTHERWISE, PERSONAL INJURY COULD RESULT.
NOTE: In
the event deployment has occurred, inspect coil assembly wire for any signs of scorching, melting or any
other damage due to excessive heat.
If the coil has been damaged, replace it.
REMOVAL ~-----------------------------,
1. Disable the SRS. (Refer to "Disabling the SRS "
in this section.)
2. Remove
inflator module (Air Bag) from steering
wheel by removing four bolts. Lift inflator module
(Air Bag) out of steering wheel
3. Disconnect 2-way yellow connector and remove
inflator module (Air Bag).
4. Disconnect horn lead connector
5. Remove steering wheel attachment nut.
6. Apply a setting mark across the steering wheel
and shaft so parts can be reassembled in their
original position.
7.
Move the tires to the straight ahead position
before removing the steering
wheel.and install
steering wheel puller onto steering wheel and
remove steering
wheel with J-29752.
8. Feed wiring through the wheel and remove
wheel.
CAUTION:
NEVER APPLY FORCE TO THE
STEERING WHEEL IN DIRECTION OF THE SHAFT
BY USING A HAMMER OR OTHER IMPACT TOOLS
IN AN ATTEMPT TO REMOVE THE STEERING
WHEEL. THE STEERING SHAFT IS DESIGNED AS
AN ENERGY ABSORBING UNIT.
-

Supplemental Restraint System 9J-127
SRS COIL ASSEMBLY
WARNING: SAFETY PRECAUTIONS MUST BE FOLLOWED WHEN HANDLING A DEPLOYED INFLATOR
MODULE{AIR
BAG). AFTER DEPLOYMENT, THE INFLATOR MODULE{AIR BAG) SURFACE MAY CONTAIN A
SMALL AMOUNT OF SODIUM HYDROXIDE, A BY-PRODUCT OF THE DEPLOYMENT REACTION, THAT IS
IRRITATING TO
THE SKIN AND EYES. MOST OF THE POWDER ON THE INFLATOR MODULE (AIR BAG )IS
HARMLESS.
AS A PRECAUTION, WEAR GLOVES AND SAFETY GLASSES WHEN HANDLING A DEPLOYED
INFLATOR MODULE {AIR BAG ), AND WASH YOUR HANDS WITH MILD SOAP AND WATER AFTERWARDS.
WARNING: WHEN CARRYING A LIVE INFLATOR MODULE {AIR BAG ), MAKE SURE THE BAG AND TRIM
COVER
ARE POINTED AWAY FROM YOU. NEVER CARRY INFLATOR MODULE {AIR BAG )BY THE WIRES OR
CONNECTOR ON
THE UNDERSIDE OF MODULE. IN THE CASE OF AN ACCIDENTAL DEPLOYMENT, THE BAG
WILL THEN DEPLOY WITH MINIMAL CHANCE OF INJURY. WHEN PLACING A LIVE INFLATOR MODULE (AIR
BAG ) ON A BENCH OR OTHER SURFACE, ALWAYS FACE BAG AND TRIM COVER UP, AWAY FROM THE
SURFACE. NEVER REST A STEERING COLUMN ASSEMBLY ON THE STEERING WHEEL WITH THE INFLATOR
MODULE (AIR BAG) FACE DOWN AND COLUMN VERTICAL. THIS IS NECESSARY SO THAT A FREE SPACE
IS PROVIDED TO
ALLOW THE INFLATOR MODULE { AIR BAG ) TO EXPAND IN THE UNLIKELY EVENT OF
ACCIDENTAL
DEPLOYMENT. OTHERWISE, PERSONAL INJURY COULD RESULT.
NOTE:
In the event deployment has occurred, inspect coil assembly wire for any signs of scorching, melting or any
other damage due to excessive heat.
If the coil has been damaged, replace it.
REMOVAL ~------------------------------------------,
1. Disable the SRS. (Refer to "Disabling the SRS"
in this section.)
2. Remove the transmission knob(for
MIT) and
transfer
control knob.
3. Remove front console assembly and disconnect
the wiring harness connector.
4. Remove the steering lower cover and engine
hood opening
lever.
5. Remove inflator module (Air Bag) from steering
wheel by removing four bolts. Lift inflator module
(Air Bag) out of steering wheel.
6. Disconnect connector and remove inflator
module (Air Bag).
7. Disconnect horn lead
8. Remove steering wheel attachment nut.
9. Apply a setting mark across the steering wheel
and shaft so parts can be reassembled in their
original position.
10. Move the tires to the straight ahead position
before removing the steering
wheel and install
steering wheel puller onto steering wheel and
remove steering
wheel with J-29752.
11. Feed wiring through the wheel and remove
wheel.
CAUTION:
NEVER APPLY FORCE TO THE
STEERING WHEEL IN DIRECTION OF THE SHAFT
BY USING A HAMMER OR OTHER IMPACT TOOLS
~ IN AN ATTEMPT TO REMOVE THE STEERING
WHEEL. THE STEERING SHAFT IS DESIGNED AS
AN ENERGY ABSORBING UNIT.

Supplemental Restraint System 9J-129
STEERING COLUMN
WARNING: SAFETY PRECAUTIONS MUST BE FOLLOWED WHEN HANDLING A DEPLOYED INFLATOR
MODULE{AIR
BAG). AFTER DEPLOYMENT, THE INFLATOR MODULE{AIR BAG) SURFACE MAY CONTAIN A
SMALL AMOUNT OF SODIUM HYDROXIDE, A BY-PRODUCT OF THE DEPLOYMENT REACTION, THAT IS
IRRITATING TO
THE SKIN AND EYES. MOST OF THE POWDER ON THE INFLATOR MODULE (AIR BAG )IS
HARMLESS.
AS A PRECAUTION, WEAR GLOVES AND SAFETY GLASSES WHEN HANDLING A DEPLOYED
INFLATOR MODULE (AIR BAG ), AND WASH YOUR HANDS WITH MILD SOAP AND WATER AFTERWARDS.
WARNING: WHEN CARRYING A LIVE INFLATOR MODULE {AIR BAG ), MAKE SURE THE BAG AND TRIM
COVER
ARE POINTED AWAY FROM YOU. NEVER CARRY INFLATOR MODULE (AIR BAG )BY THE WIRES OR
CONNECTOR ON
THE UNDERSIDE OF MODULE. IN THE CASE OF AN ACCIDENTAL DEPLOYMENT, THE BAG
WILL THEN DEPLOY WITH MINIMAL CHANCE OF INJURY. WHEN PLACING A LIVE INFLATOR MODULE (AIR
BAG ) ON A BENCH OR OTHER SURFACE, ALWAYS FACE BAG AND TRIM COVER UP, AWAY FROM THE
SURFACE.NEVER REST A STEERING COLUMN ASSEMBLY ON THE STEERING WHEEL WITH THE INFLATOR
MODULE {AIR
BAG) FACE DOWN AND COLUMN VERTICAL. THIS IS NECESSARY SO THAT A FREE SPACE
IS PROVIDED TO
ALLOW THE INFLATOR MODULE (AIR BAG) TO EXPAND IN THE UNLIKELY EVENT OF
ACCIDENTAL
DEPLOYMENT. OTHERWISE, PERSONAL INJURY COULD RESULT.
NOTE:
In the event deployment has occurred, inspect coil assembly wire for any signs of scorching, melting or any
other damage due to excessive heat.
If the coil has been damaged, replace it.
REMOVAL ~--------------------------~
1. Disable the SRS. (Refer to "Disabling the SRS "
in this section.)
2. Remove the transmission knob(for MIT) and
transfer
control knob.
3. Remove front console assembly and disconnect
the wiring harness connector.
4. Remove the steering lower cover and engine
hood opening
lever.
5. Remove inflator module (Air Bag) from steering
wheel by removing four bolts. Lift inflator module
(Air Bag) out of steering wheel.
6. Disconnect 2-way yellow connector and remove
inflator module (Air Bag).
7. Disconnect horn lead connector
8. Remove steering wheel attachment nut.
9. Apply a setting mark across the steering wheel
and shaft so parts can be reassembled in their
original position.
1
0. Move the tires to the straight ahead position
before removing the steering
wheel, and install
steering wheel puller onto steering wheel and
remove steering
wheel with J-29752.
11. Feed wiring through the wheel and remove
wheel.
y
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