Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 736

6D2–1

IGNITION SYSTEM

TROOPER

ENGINE

IGNITION SYSTEM

CONTENTS

Service Precaution

6D2–1

. . . . . . . . . . . . . . . . . . . . . . 

General Description

6D2–2

. . . . . . . . . . . . . . . . . . . . . 

Diagnosis

6D2–2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Ignition Coil

6D2–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Removal

6D2–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

6D2–3

. . . . . . . . . . . . . . . . . . 

Installation

6D2–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Spark Plug

6D2–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Removal

6D2–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

6D2–5

. . . . . . . . . . . . . . . . . . 

Installation

6D2–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Crankshaft Position Sensor

6D2–6

. . . . . . . . . . . . . . . 

Removal

6D2–6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

6D2–6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Main Data and Specifications

6D2–7

. . . . . . . . . . . . . 

Service Precaution

WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS).  REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.

CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.

SECTION

6D2–2

IGNITION SYSTEM

General Description

Ignition is done by the electronic ignition (El) that directly
fires the spark plugs from ignition coils through spark plug
wires without using a distributor. A pair of ignition coils for
the cylinders having different phases by 360

°

 (No.1 and

No.4,No.2 and No.5,No.3 and No.6) are fired
simultaneously.
Since the cylinder on exhaust stroke requires less energy
to fire its ignition plug, energy from the ignition coils can be
utilized to fire the mating cylinder on compression stroke.
After additional 360

°

 rotation, respective cylinder strokes

are reversed.
The EI consists of six ignition coils, ion sensing module,
crankshaft position sensor, powertrain control module
(PCM) and other components.

The crankshaft position coils are connected with the PCM
by means of a 80 pin connector.
The PCM and ion sensing module turn on/off the primary
circuit of ignition coils.
A notch in the timing disc on the crankshaft activates the
crank position sensor which then sends information such
as firing order and starting timing of each ignition coil to
the PCM.
Further, the El employs ignition control (IC) to control
similar to a distributor system.
By receiving signals such as crank position,engine
speed, water temperature and Manifold Absolute
Pressure (MAP), combustion guality, the PCM controls
the ignition timing.

D06RY00037

Diagnosis

Refer to Section Drivability and Emissions for the
diagnosis to electronic ignition system (El system).

6D2–3

IGNITION SYSTEM

Ignition Coil

Removal

1. Disconnect battery ground cable.
2. Ignition coil connector and ignition coil.

D

Disconnect three connector from ignition coil.

D

Remove harness bracket bolt on cylinder head
cover.

D

Remove fixing bolts on ignition coil.

060RY023

Legend

(1) Ignition Coil Connector
(2) Bolt
(3) Ignition Coil Assembly

Inspection and Repair

Check the ignition coil assembly for insulation. Check
terminals for corrosion or damage, and replace as
necessary.
Measuring resistance of ignition coil assembly.

Terminal No.

Limit

1 to 2

Resistance cannot be 0
ohm (short) or infinity
(open circuit).

1 to 3

Same as above

2 to 3

Same as above

Measure resistance of ignition coil assembly, and replace
the ignition coil assembly if its value exceeds the
standard.

060RW006

Installation

1. Install the ignition coil assembly (3).

Connect ignition coil connector (1) and ignition coil
(3), then tighten bolt (2) to the specified torque.

Torque: 4 N·m (35 lb in)

060RY023

6D2–4

IGNITION SYSTEM

CAUTION: Ignition coil assembly # 6 is different
from ignition coil assembly from # 1 to # 5. Ignition
coil assembly # 6 is short type. So, note it when
installing ignition coil assembly of # 6.

060RY00002

Legend

(1) Long Type Ignition Coil Assemblies (# 1 

∼

 # 5)

(2) Short Type Ignition Coil Assembly (# 6)

2. Connect battery ground cable.