gas type OPEL FRONTERA 1998 User Guide

6E–323 ENGINE DRIVEABILITY AND EMISSIONS
11. Connect the fuel filler fuse at the tank.
12. Connect the air breather hose at the tank.
TS23796
13. Fill the fuel tank with fuel.
14. Tighten the fuel filler cap.
15. Connect the negative battery cable.
Throttle Body (TB)
Removal Procedure
1. Disconnect the negative battery cable.
2. Drain the cooling system. Refer to
Cooling System.
3. Remove the accelerator cable assembly. Refer to
Accelerator Cable in Engine Speed Control System..
4. Disconnect the electrical connectors:
Throttle position (TP) sensor.
Idle air control (IAC) solenoid.
Intake air temperature (IAT) sensor. Refer to
Intake Air Temperature Sensor.
035RW023
5. Disconnect the vacuum hose below the air horn.
6. Remove the intake air duct clamp.
7. Disconnect the intake air duct.
8. Disconnect the coolant lines from the throttle body.
9. Remove the bolts from the common chamber.
10. Remove the throttle body from the common chamber.
11. Remove the gasket from the upper intake manifold.
035RW024
12. Remove the IAC. Refer to Idle Air Control (IAC)
Solenoid
.
13. Remove the TP sensor. Refer to
Throttle Position
(TP) Sensor
.
Inspection Procedure
NOTE: Do not use solvent of any type when you clean the
gasket surfaces on the intake manifold and the throttle
body assembly. The gasket surfaces and the throttle
body assembly may be damaged as a result.
If the throttle body gasket needs to be replaced,
remove any gasket material that may be stuck to the
mating surfaces of the manifold.
Do not leave any scratches in the aluminum casting.
Installation Procedure
1. Install the TP sensor. Refer to Throttle Position (TP)
Sensor
.
2. Install the IAC. Refer to
Idle Air Control (IAC)
Solenoid
.
3. Install the gasket on the common chamber.
4. Install the throttle body on the common chamber.

6F–3 ENGINE EXHAUST
For Isuzu General Motors (IGM)
150RW058
When inspecting or replacing exhaust system
components, make sure there is adequate clearance
from all points on the underbody to prevent overheating
the floor pan and possible damage to the passenger
compartment insulation and trim materials.
Check complete exhaust system and nearby body areas
and rear compartment lid for broken, damaged, missing
or mispositioned parts, open seams, holes, loose
connections or other deterioration which could permit
exhaust fumes to seep into the rear compartment or
passenger compartment. Dust or water in the rear
compartment may be an indication of a problem in one of
these areas. Any faulty areas should be corrected
immediately.
Hangers
Various types of hangers are used to support exhaust
system(s). These include conventional rubber straps,
rubber rings, and rubber blocks.
The installation of exhaust system supports is very
important, as improperly installed supports can cause
annoying vibrations which can be difficult to diagnose.
Three Way Catalytic Converter
The three way catalytic converter is an emission control
device added to the exhaust system to reduce pollutants
from the exhaust gas stream.
CAUTION: The catalytic converter requires the use
of unleaded fuel only.
Periodic maintenance of the exhaust system is not
required. If the vehicle is raised for other service, it is
advisable to check the condition of the complete exhaust
system.
A dual bed monolith catalytic converter is used in
combination with three way catalytic converter.
Catalytic Types:
Three way (Reduction/Oxidation) catalyst
The catalyst coating on the three way (reduction)
converter contains platinum and rhodium which lowers
the levels of nitrous oxide (NOx) as well as hydrocarbons
(HC) and carbon monoxide (Co).
Gasket
The gasket must be replaced whenever a new exhaust
pipe, muffler or catalytic converter is installed.

ENGINE MECHANICAL 6A – 9
SERVICING
Servicing refers to general maintenance procedures to
be performed by qualified service personnel.
MODEL IDENTIFICATION
Engine Serial Number
The engine number is stamped on the rear left hand
side of the cylinder body.
AIR CLEANER
Oil Wetted (Viscous) Type Paper Element.
The air cleaner has an oil wetted paper element. No
servicing is required until the replacement interval is
reached.
Never attempt to clean the element, no matter how dirty
it may appear. The element is designed to provide
normal filtering efficiency until it becomes due for
replacement.
Refer to the Item “Service and Maintenance” in the
Owner’s and Driver’s Manual for general service
information.
LUBRICATING SYSTEM
Main Oil Filter (Cartridge Type Paper Element)
Replacement Procedure
1. Loosen the drain plug to drain the engine oil.
2. Wait a few minutes and then retighten the drain
plug.
3. Loosen the used oil filter (2) by turning it counter-
clockwise with the filter wrench.
4. Clean the oil filer gasket fitting face.
This will allow the new oil filter to seat properly.
5. Apply a light coat of engine oil to the O-ring.
6. Turn the new oil filter until the filter O-ring is fitted
against the sealing face.
7. Use the filter wrench to turn the filter additional one
and 1/4 turns.
Filter Wrench: 5-5540-0203-0
012RW115
012RW062
For Europe1
2
050R200001

ENGINE MECHANICAL 6A – 43
CYLINDER HEAD GASKET
12
13
14
15
8
3
4
5 6
10
11 9
With
spacer type
Without
spacer type
1 7
2
011R200002
Legend
(1) Cylinder Head Noise Insulator Cover
(2) Insulator
(3) Bolt and Gasket
(4) Oil Seal
(5) Gasket
(6) Cylinder Head Cover
(7) Bolt, Stud and Rubber Mounting
(8) Injector Clamp(9) Oil Rail
(10) Injector Assembly
(11) Camshaft Carrier
(12) Cylinder Head Bolt
(13) Cylinder Head Assembly
(14) Cylinder Head Gasket
(15) Cylinder Block

ENGINE MECHANICAL 6A – 47
CAMSHAFT
2 1
6With
spacer type
Without
spacer type
13 14
8
12
11
109
3
4
7
5
012R200004
Legend
(1) Nut and Washer
(2) Injector Clamp
(3) Nut
(4) Bolt
(5) Oil Rail Assembly
(6) Spacer (If equipped) and Bolt
(7) Injector Assembly(8) Camshaft
(9) Camshaft Carrier
(10) Plug
(11) Oil Seal
(12) Camshaft Bracket
(13) Gasket
(14) Gasket

ENGINE FUEL 6C – 9
INJECTOR
2 1
6With
spacer type
Without
spacer type
8 9
3
4
7
5
Legend
(1) Nut and Washer
(2) Injector Clamp
(3) Nut
(4) Bolt
(5) Oil Rail Assembly
(6) Spacer (If equipped) and Bolt
(7) Injector Assembly(8) Gasket
(9) O-Ring
012R200006

ENGINE ELECTRICAL 6D – 1
ENGINE ELECTRICAL
CONTENTS
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6D–1
General Description . . . . . . . . . . . . . . . . 6D–1
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . 6D–1
On Vehicle Service . . . . . . . . . . . . . . . . . 6D–3
Main Data and Specification . . . . . . . . . . 6D–4
Starting System . . . . . . . . . . . . . . . . . . . . . 6D–5
General Description . . . . . . . . . . . . . . . . 6D–5
On Vehicle Service . . . . . . . . . . . . . . . . . 6D–7
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . 6D–7
Unit Repair . . . . . . . . . . . . . . . . . . . . . . . 6D–8Charging System . . . . . . . . . . . . . . . . . . . . 6D–15
General Description . . . . . . . . . . . . . . . . 6D–15
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . 6D–16
Unit Repair . . . . . . . . . . . . . . . . . . . . . . . 6D–17
Main Data and Specification . . . . . . . . . . 6D–22
QOS4 Preheating System . . . . . . . . . . . . . . 6D–23
General Description . . . . . . . . . . . . . . . . 6D–23
System Diagram . . . . . . . . . . . . . . . . . . . 6D–23
Inspection of QOS4 System Operation . . 6D–24
BATTERY
GENERAL DESCRIPTION
DIAGNOSIS
There are six battery fluid caps at the top of the battery.
These are covered by a paper label.
The battery is completely sealed except for the six
small vent holes at the side. These vent holes permit
the escape of small amounts of gas generated by the
battery.
This type of battery has the following advantages over
conventional batteries:1. There is no need to add water during the entire
service life of the battery.
2. The battery protects itself against overcharging.
The battery will refuse to accept an excessive
charge.
(A conventional battery will accept an excessive
charge, resulting in gassing and loss of battery
fluid.)
3. The battery is much less vulnerable to self-
discharge than a conventional type battery.
1. VISUAL INSPECTION (Step 1)
Inspect the battery for obvious physical damage, such
as a cracked or broken case, which would permit
electrolyte loss.
Replace the battery if obvious physical damage is
discovered during inspection.
Check for any other physical damage and correct it as
necessary. If not, proceed to Step 2.
2. HYDROMETER CHECK (Step 2)
There is a built-in hydrometer (Charge test indicator) at
the top of the battery. It is designed to be used during
diagnostic procedures.
Before trying to read the hydrometer, carefully clean the
upper battery surface.
If your work area is poorly lit, additional light may be
necessary to read the hydrometer.
a. BLUE RING OR DOT VISIBLE – Go to Step 4.
b. BLUE RING OR DOT NOT VISIBLE – Go to
Step 3.3. FLUID LEVEL CHECK (Step 3)
The fluid level should be between the upper level line
and lower level line on side of the battery.
a. CORRECT FLUID LEVEL – Charge the battery.
b. BELOW LOWER LEVEL – Replace battery.
4. VOLTAGE CHECK (Step 4)
(1) Put voltmeter test leads to battery terminals.
a. VOLTAGE IS 12.4V OR ABOVE – Go to Step 5.
b. VOLTAGE IS UNDER 12.4V – Go to procedure
(2) below.
(2) Determine fast charge amperage from
specification. (See Main Data and Specifications in
this section.)
Fast charge battery for 30 minutes at amperage
rate no higher than specified value.
Take voltage and amperage readings after charge.
a. VOLTAGE IS ABOVE 16V AT BELOW 1/3 OF
AMPERAGE RATE – Replace battery.

6E–1 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
4JX1–TC 3.0L ENGINE
DRIVEABILITY AND EMISSIONS
CONTENTS
Specification 6E–7. . . . . . . . . . . . . . . . . . . . . . . . . .
Tightening Specifications 6E–7. . . . . . . . . . . . . . .
Diagrams and Schematics 6E–8. . . . . . . . . . . . . . . .
ECM Wiring Diagram (1 of 6) 6E–8. . . . . . . . . . . .
ECM Wiring Diagram (2 of 6) 6E–9. . . . . . . . . . . .
ECM Wiring Diagram (3 of 6) 6E–10. . . . . . . . . . . .
ECM Wiring Diagram (4 of 6) 6E–11. . . . . . . . . . . .
ECM Wiring Diagram (5 of 6) 6E–12. . . . . . . . . . . .
ECM Wiring Diagram (6 of 6) 6E–13. . . . . . . . . . . .
ECM Pinouts 6E–14. . . . . . . . . . . . . . . . . . . . . . . . . . .
ECM Pinout Table, 32-Way Connector – J1
RED – Upper 6E–14. . . . . . . . . . . . . . . . . . . . . . . . .
ECM Pinout Table, 32-Way Connector – J1
RED – Lower 6E–15. . . . . . . . . . . . . . . . . . . . . . . . .
ECM Pinout Table, 32-Way Connector – J2
BLUE – Upper 6E–16. . . . . . . . . . . . . . . . . . . . . . . .
ECM Pinout Table, 32-Way Connector – J2
BLUE – Lower 6E–17. . . . . . . . . . . . . . . . . . . . . . . .
ECM Pinout Table, 5-Way Connector – J3 6E–18
Component Locator 6E–19. . . . . . . . . . . . . . . . . . . . .
Sensors and Miscellaneous Component
Locators 6E–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations Charts 6E–23. . . . . . . . . . . . . . . . . . . .
Diagnosis 6E–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strategy-Based Diagnostics 6E–24. . . . . . . . . . . . .
Strategy-Based Diagnostics 6E–24. . . . . . . . . . . . .
DTC Stored 6E–24. . . . . . . . . . . . . . . . . . . . . . . . . . .
No DTC 6E–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No Matching Symptom 6E–24. . . . . . . . . . . . . . . . .
Intermittents 6E–24. . . . . . . . . . . . . . . . . . . . . . . . . .
No Trouble Found 6E–24. . . . . . . . . . . . . . . . . . . . .
Verifying Vehicle Repair 6E–24. . . . . . . . . . . . . . . .
General Service Information 6E–25. . . . . . . . . . . . . .
Serviceability Issues 6E–25. . . . . . . . . . . . . . . . . . .
Visual/Physical Engine Compartment
Inspection 6E–25. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Knowledge of Tools Required 6E–25. . . . . .
Serial Data Communications 6E–25. . . . . . . . . . . . . .
Class II Serial Data Communications 6E–25. . . . .
On-Board Diagnostic (OBD) 6E–25. . . . . . . . . . . . . .
On-Board Diagnostic Tests 6E–25. . . . . . . . . . . . .
Comprehensive Component Monitor
Diagnostic Operation 6E–25. . . . . . . . . . . . . . . . . .
Common OBD Terms 6E–26. . . . . . . . . . . . . . . . . .
The Diagnostic Executive 6E–26. . . . . . . . . . . . . . .
DTC Types 6E–26. . . . . . . . . . . . . . . . . . . . . . . . . . .
Verifying Vehicle Repair 6E–27. . . . . . . . . . . . . . . . Reading Flash Diagnostic Trouble Codes 6E–27.
Reading Diagnostic Trouble Codes Using
a TECH 2 6E–28. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tech 2 Scan Tool 6E–29. . . . . . . . . . . . . . . . . . . . . .
Getting Started 6E–30. . . . . . . . . . . . . . . . . . . . . . . .
DTC Modes 6E–32. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC Information Mode 6E–32. . . . . . . . . . . . . . . . .
Injector Test 6E–32. . . . . . . . . . . . . . . . . . . . . . . . . .
EGR Valve Test 6E–32. . . . . . . . . . . . . . . . . . . . . . .
Rail Pressure Control Valve Test 6E–32. . . . . . . . .
Injector Balance Test 6E–32. . . . . . . . . . . . . . . . . . .
Data Programming in Case of ECM Change 6E–32
Rail Pressure Sensor Programming 6E–33. . . . . .
Injector Group Sign Programming
(Injector Change) 6E–33. . . . . . . . . . . . . . . . . . . . .
On-Board Diagnostic (OBD) System Check 6E–35.
Circuit Description 6E–37. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 6E–37. . . . . . . . . . . . . . . . . . . . . . . .
Engine Control Module ECM Diagnosis 6E–39. . . .
Multiple ECM Information Sensor DTCS Set 6E–39
Circuit Description 6E–39. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 6E–39. . . . . . . . . . . . . . . . . . . . . . . .
EGR (Exhaust Gas Recirculation) Diagnosis 6E–41
Tech 2 Data Definitions and Ranges 6E–41. . . . . . .
Typical Scan Data Values 6E–41. . . . . . . . . . . . . . . .
Test Conditions 6E–41. . . . . . . . . . . . . . . . . . . . . . . .
4JX1-TC Engine (Automatic and Manual
Transmission) 6E–42. . . . . . . . . . . . . . . . . . . . . . . .
No Malfunction Indicator Lamp (MIL) 6E–44. . . . . . .
Circuit Description 6E–44. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 6E–44. . . . . . . . . . . . . . . . . . . . . . . .
Malfunction Indicator Lamp (MIL) “ON”
Steady 6E–47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit description 6E–47. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 6E–47. . . . . . . . . . . . . . . . . . . . . . . .
Engine Cranks But Will Not Run 6E–49. . . . . . . . . . .
Circuit Description 6E–49. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 6E–49. . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Gas Recirculation (EGR) System
Check 6E–52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Description 6E–52. . . . . . . . . . . . . . . . . . . . .
ECM Diagnostic Trouble Codes 6E–54. . . . . . . . . . .
ECM Diagnostic Trouble Codes 6E–54. . . . . . . . .
Diagnostic Trouble Code (DTC) P0107
(Flash DTC 34)
MAP Sensor Circuit Low Voltage 6E–56. . . . . . . . . .

6E–217 4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Throttle Body (TB)
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the cover of the intercooler.
035RW051
3. Remove the bolts and the left side bracket to the
intercooler.
4 . R e m o v e t h e a i r d u c t w i t h b r a c k e t f r o m t h e i n t e r c o o l e r.
035RW086
5. Remove the throttle body assembly from the intake
manifold.
6. Disconnect the ITP sensor electrical connector.
Installation Procedure
NOTE: Do not use solvent of any type when you clean the
gasket surfaces on the intake manifold and the throttle
body assembly. The gasket surfaces and the throttle body
assembly may be damaged as a result.
If the throttle body gasket needs to be replaced,
remove any gasket material that may be stuck to the
mating surfaces of the manifold.
Do not leave any scratches in the aluminum casting.
1. Install the throttle body assembly to the intake
manifold and the air duct with bracket between
throttle body and intercooler.
Torque: 20 Nꞏm (14 Ib ft)
035RW086
2. Connect the ITP sensor electrical connector and
throttle motor control connector.
3. Install the bracket to the intercooler.
4. Install the cover of intercooler.
5. Connect the negative battery cable.
Air Conditioning (A/C) Relay
Removal Procedure
1. Remove the fuse and relay box cover from under the
hood.
2. Consult the diagram on the cover to determine which
is the correct relay.
3. Pull the relay straight up and out of the fuse and relay
box.
Installation Procedure
1. Insert the relay into the correct place in the fuse and
relay box with the catch slot facing forward.
2. Press down until the catch engages.
An audible “click” will be heard.
3. Install the fuse and relay box cover.
Exhaust Gas Recirculation
(EGR) Vacuum Switch Valve
(VSV)
Removal Procedure
1. Disconnect the negative battery cable.

6F – 2 ENGINE EXHAUST
GENERAL DESCRIPTION
150RW070
When inspecting or replacing exhaust system
components, make sure there is adequate clearance
from all points on the underbody to prevent overheating
of the floor pan and possible damage to the passenger
compartment insulation and trim materials.
Check complete exhaust system and nearby body
areas and rear compartment lid for broken, damaged,
missing or mispositioned parts, open seams, holes
loose connections or other deterioration which could
permit exhaust fumes to seep into the rear
compartment or passenger compartment. Dust or water
in the rear compartment may be an indication of a
problem in one of these areas. Any faulty areas should
be corrected immediately.HANGERS
Various types of hangers are used to support exhaust
system(s). These include conventional rubber straps,
rubber rings, and rubber blocks.
The installation of exhaust system supports is very
important, as improperly installed supports can cause
annoying vibrations which can be difficult to diagnose.
GASKET
The gasket must be replaced whenever a new exhaust
pipe, muffler or exhaust throttle is installed.