Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 242

6D3–23

STARTING AND CHARGING SYSTEM (6VE1 3.5L)

Rectifier Assembly

1. Measure the resistance between each diode terminal

and aluminum diode fin in forward and reverse
directions with the connection of the tester leads
switched. The diodes are normal if resistance is
nearly zero ohms in one direction and is infinitely high
in the other direction.

2. If a diode has no resistance or equal resistance in

both directions, it is defective and should be replaced
together with the holder.

066RS036

IC Regulator Assembly

Connect a variable resistor, two 12V batteries, a fixed
resistor, and a voltmeter to the IC regulator as shown in
illustration.

a. Measuring equipment specifications
1. Fixed resistor (R1) : 10 Ohms /3W
2. Variable resistor (Rv) : 0-300 Ohms/12W
3. Batteries (BAT1, BAT2) : 12V (2 Batteries)
4. DC voltmeter : 0-50V/0.5 steps (4 Check points)
b. Measuring procedure
1. Measure the voltage “V1” across the first battery

(BAT1). If the reading is between 10 and 13 volts,
the battery is normal.

2. Measure the voltage “V3” across both the batteries

(BAT1, BAT2). If the reading is between 20 and 26
bolts, the batteries are normal.

3. Gradually increase the resistance of the variable

resistor from zero. Measure the voltage “V2” (the
voltage across the F and E terminals).

Check to see that the voltage across “V1” changes at
this time. If there is no change, the voltage regulator
is faulty and must be replaced.

4. Measure the voltage at “V4” (the voltage across the

variable resistor center tap and terminal E with the
variable resistor resistance held constant). The
measured voltage should be within the specified
(14.4

0.3 volts) limits. If it is not, the regulator must

be replaced.

066RX003

Reassembly

To reassemble, follow the disassembly steps in the
reverse order, noting the following points:

NOTE:

Never make battery connections with polarities
reversed, or battery will be shorted via the diodes.
This will cause damage to the diodes.

Do not connect generator B terminal to ground; it is
connected directly to the battery.
This cable will burn if it is connected to ground.

Make sure to disconnect the positive (+) terminal of
the battery when quick-charging battery .
Diodes may be damaged due to abnormal pulse
voltage generated by the quick charger.

When reassembling the front section to rear section,
insert a stiff wire into hole in the rear face of the rear
cover from the outboard side to support the brush in
raised position, then insert the front section to which
rotor is assembled.

Reassemble parts carefully to be sure they fit into
their original position, paying attention to the
insulated portions.

Wipe insulating tubes, washers and plates clean and
install them in position carefully to avoid getting oil or
grease on them.

6D3–24 STARTING AND CHARGING SYSTEM (6VE1 3.5L)

1. Using a press with a socket wrench attached,

reassemble rotor and rear end cover assembly in the
front cover.

066RS022

2. Install pulley on the rotor.

Secure the pulley directly in the vise between two
copper plates, and tighten nut to the specified torque.

Torque: 111 N·m (82 lb ft)

066RS010

Bench Test

Conduct a bench test of the generator.

066RS023

Preparation

Remove generator from the vehicle (see “Generator
removal”).

1. Secure generator to the bench test equipment and

connect wires.
Terminal “IG” for energization
Terminal “L” for neutral (warning lamp)
Terminal “B” for output

2. Conduct the generator characteristic test.

Characteristics of generator are shown in illustration.
Repair or replace the generator if its outputs are
abnormal.

066RX001

6D3–25

STARTING AND CHARGING SYSTEM (6VE1 3.5L)

Main Data and Specifications

General Specifications

Battery voltage

Rated output

Direction of rotation

(as viewed from pulley side)

Clockwise

Rated rotation speed

rpm

5000

Maximum speed

rpm

18000

6E–1

6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

AXIOM

ENGINE

6VE1 3.5L ENGINE

DRIVEABILITY AND EMISSIONS

CONTENTS

Specifications

6E–6

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

Tightening Specifications

6E–6

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

Diagrams and Schematics

6E–7

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

PCM Wiring Diagram (1 of 7)

6E–7

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

PCM Wiring Diagram (2 of 7)

6E–8

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

PCM Wiring Diagram (3 of 7)

6E–9

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

PCM Wiring Diagram (4 of 7)

6E–10

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

PCM Wiring Diagram (5 of 7)

6E–11

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

PCM Wiring Diagram (6 of 7)

6E–12

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

PCM Wiring Diagram (7 of 7)

6E–13

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

PCM Pinouts

6E–14

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

PCM Pinout Table, 80-Way Blue Connector
– Row “F1

∼

20”

6E–14

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

PCM Pinout Table, 80-Way Blue Connector
– Row “F20

∼

40”

6E–15

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

PCM Pinout Table, 80-Way Blue Connector
– Row “F41

∼

60”

6E–16

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

PCM Pinout Table, 80-Way Blue Connector
– Row “F61

∼

80”

6E–17

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

PCM Pinout Table, 80-Way Red Connector
– Row “S1

∼

20”

6E–19

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

PCM Pinout Table, 80-Way Red Connector
– Row “S21

∼

40”

6E–21

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

PCM Pinout Table, 80-Way Red Connector
– Row “S41

∼

60”

6E–23

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

PCM Pinout Table, 80-Way Red Connector
– Row “S61

∼

80”

6E–25

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

Component Locators

6E–27

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

Undercarriage Component Locator

6E–29

. . . . . .

Fuse and Relay Panel (Underhood
Electrical Center)

6E–30

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

Sensors and Miscellaneous Component
Locators

6E–31

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

Diagnosis

6E–33

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

Strategy-Based Diagnostics

6E–33

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

DTC Stored

6E–33

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

No DTC

6E–33

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

No Matching Symptom

6E–33

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

Intermittents

6E–33

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

No Trouble Found

6E–33

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

Verifying Vehicle Repair

6E–33

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

General Service Information

6E–33

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

OBD II Serviceablity Issues

6E–33

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

Emissions Control Information Label

6E–34

. . . . .

Visual / Physical Engine Compartment
Inspection

6E–34

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

Basic Knowledge of Tools Required

6E–35

. . . . . .

Serial Data Communications

6E–35

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

Class 2 Serial Data Communications

6E–35

. . . . .

On-Board Diagnostic (OBD II)

6E–35

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

On-Board Diagnostic Tests

6E–35

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

Comprehensive Component Monitor
Diagnostic Operation

6E–35

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

System Status and Drive Cycle for
Satisfying Federal Inspection/Maintenance
(I/M 240) Regulations

6E–36

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

Common OBD II Terms

6E–36

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

The Diagnostic Executive

6E–36

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

DTC Types

6E–37

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

Decimal/Binary/Hexadecimal Conversions

6E–39

Verifying Vehicle Repair

6E–39

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

Reading Diagnostic Trouble Codes Using
The Tech 2 Scan Tool

6E–39

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

Tech 2

6E–40

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

Tech 2 Features

6E–41

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

Getting Started

6E–41

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

Operating Procedure (For Example)

6E–42

. . . . .

DTC Modes

6E–43

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

DTC Information Mode

6E–43

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

Miscellaneous Test

6E–44

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

Lamps Test

6E–44

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

Relays Test

6E–46

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

EVAP Test

6E–47

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

Fuel System Test

6E–48

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

Instruments Test

6E–50

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

EGR Control Test

6E–52

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

Variable Intake Manifold Solenoid Test

6E–52

. . .

Injector Balance Test

6E–54

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

Plotting Snapshot Graph

6E–54

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

Plotting Graph Flow Chart (Plotting graph
after obtaining vehicle information)

6E–55

. . . . . .

Flow Chart for Snapshot Replay (Plotting
Graph)

6E–56

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

Primary System-Based Diagnostic

6E–57

. . . . . . . . .

Primary System-Based Diagnostic

6E–57

. . . . . . .

Fuel Control Heated Oxygen Sensor

6E–57

. . . . .

HO2S Heater

6E–57

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

Catalyst Monitor Heated Oxygen Sensors
and Diagnostic Operation

6E–57

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

Misfire Monitor Diagnostic Operation

6E–58

. . . . . . .

Misfire Monitor Diagnostic Operation

6E–58

. . . . .

Misfire Counters

6E–58

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

SECTION

Content .. 240 241 242 243 ..