Page 937 of 2100

6D2±2
IGNITION SYSTEM (6VE1 3.5L)
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. The firing orders are
selected No.1, No.2, No.3, No.4, No.5, and No6.
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,ignition control
module, crank position sensor, powertrain control module
(PCM) and other components.
The ignition coils are connected with the PCM by means
of a 80 pin connector.The ignition control module turns on/off the primary circuit
of ignition coils, and also it controls the ignition timing at
the engine speed below 538 rpm.
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), the PCM controls the ignition timing.
D06RY00037
Diagnosis
Refer to Section Drivability and Emissions for the
diagnosis to electronic ignition system (El system).
Page 938 of 2100
6D2±3
IGNITION SYSTEM (6VE1 3.5L)
Ignition Coil
Removal
1. Disconnect battery ground cable.
2. Ignition coil connector and ignition coil.
Disconnect three connector from ignition coil.
Remove harness bracket bolt on cylinder head
cover.
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 2Without 0 ohm or infinity
maximum ohm.
1 to 3Same as above
2 to 3Same 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
Page 939 of 2100
6D2±4
IGNITION SYSTEM (6VE1 3.5L)
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.
Page 940 of 2100

6D2±5
IGNITION SYSTEM (6VE1 3.5L)
Spark Plug
Removal
1. Remove spark plugs.
Inspection and Repair
The spark plug affects entire engine performance and
therefore its inspection is very important.
Check electrode and insulator for presence of cracks,
and replace if any.
Check electrode for wear, and replace if necessary.
Check gasket for damage, and replace if necessary.
Measure insulation resistance with an ohmmeter, and
replace if faulty.
Adjust spark plug gap to 1.0 mm ± 1.1 mm (0.0394 in ±
0.0433 in).
011RS011
NOTE:
± Do not adjust the spark plugs gap without new
spark plugs.
± Do not damage to tip of spark plugs.
± Do not cleaning the spark plugs. If require the
cleaning it due to heavy dirt, it is allowed only 20
seconds to be used spark plug cleaner.
Check fuel and electrical systems if spark plug is
extremely dirty.
Use spark plugs having low heat value (hot type plug)
if fuel and electrical systems are normal.
Use spark plugs having high heat value (cold type
plug) if insulator and electrode are extremely burned.
Sooty Spark Plugs
Much deposit of carbon or oil on the electrode and
insulator of spark plug reduces the engine performance.
Possible causes:
Too rich mixture
Presence of oil in combustion chamber
Incorrectly adjusted spark plug gap
Burning Electrodes
This fault is characterized by scorched or heavily oxidized
electrode or blistered insulator nose.
Possible causes:
Too lean mixture
Improper heat value
Measuring Insulation Resistance
Measure insulation resistance using a 500 volt
megaohm meter.
Replace spark plugs if measured value is out of
standard.
Insulation resistance: 50 M or more
011RS010
Installation
1. Spark plugs
Tighten spark plugs to the specified torque.
Torque: 18 N´m (13 lb ft)
Page 941 of 2100
6D2±6
IGNITION SYSTEM (6VE1 3.5L)
Crankshaft Position Sensor
Removal
1. Disconnect battery ground cable
2. Wiring connector from crankshaft position sensor.
3. Remove crankshaft position sensor from cylinder
block.
012RS008
Installation
1. Install crankshaft position sensor into the cylinder
block.
Before installation,apply small amount of engine oil to
the O±ring.
Torque: 10 N´m (87 lb in)
2. Reconnect wiring connector to crankshaft position
sensor.
Page 942 of 2100
6D2±7
IGNITION SYSTEM (6VE1 3.5L)
Main Data and Specifications
General Specifications
Ignition System
Ignition FormElectronic Ignition System (El system) with Crankshaft position Sensor
Spark Plug
TypeK16PR±P11
RC10PYP4
PK16PR11
Plug gap1.0 mm ± 1.1 mm (0.0394 in ± 0.0433 in)
Torque18 N´m (13lb ft)
Torque Specifications
E06R100003
Page 943 of 2100

6D3±1
STARTING AND CHARGING SYSTEM (6VE1 3.5L)
AXIOM
ENGINE
STARTING AND CHARGING SYSTEM (6VE1 3.5L)
CONTENTS
Service Precaution 6D3±1. . . . . . . . . . . . . . . . . . . . . .
Starting System 6D3±2. . . . . . . . . . . . . . . . . . . . . . . . .
General Description 6D3±2. . . . . . . . . . . . . . . . . . . . .
Diagnosis 6D3±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter 6D3±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6D3±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6D3±5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View 6D3±7. . . . . . . . . . . . . . . . . . . .
Disassembly 6D3±8. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 6D3±10. . . . . . . . . . . . . . . . . .
Reassembly 6D3±13. . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 6D3±14. . . . . . . . . . .
Charging System 6D3±17. . . . . . . . . . . . . . . . . . . . . . . . General Description 6D3±17. . . . . . . . . . . . . . . . . . . .
General On±Vehicle Inspection 6D3±17. . . . . . . . . . .
Generator 6D3±18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6D3±18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 6D3±18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6D3±19. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View 6D3±19. . . . . . . . . . . . . . . . . . . .
Disassembly 6D3±20. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 6D3±21. . . . . . . . . . . . . . . . . .
Reassembly 6D3±23. . . . . . . . . . . . . . . . . . . . . . . . . .
Bench Test 6D3±24. . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 6D3±25. . . . . . . . . . . . .
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.
Page 944 of 2100
6D3±2
STARTING AND CHARGING SYSTEM (6VE1 3.5L)
Starting System
General Description
Cranking Circuit
The cranking system consists of a battery, starter, starter
switch, starter relay, etc. These main components are
connected.
Starter
The cranking system employs a magnetic type reduction
starter in which the motor shaft is also used as a pinion
shaft. When the starter switch is turned on, the contacts of
magnetic switch are closed, and the armature rotates. At
the same time, the plunger is attracted, and the pinion is
pushed forward by the shift lever to mesh with the ring
gear.
Then, the ring gear runs to start the engine. When the
engine starts and the starter switch is turned off, the
plunger returns, the pinion is disengaged from the ring
gear, and the armature stops rotation. When the engine
speed is higher than the pinion, the pinion idles, so that
the armature is not driven.