Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 765

6E–84

TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Tech 2

Parameter

Refer To

Typical Data

Values

(2500 RPM)

Typical Data

Values (IDLE)

Units Displayed

Data List

HO2S Bank 2
Sen.1
(millivolts)

O2
Sensor
Data

Millivolts

50-950
changing
quickly

50-950
changing
quickly

General Description and
Operation, Fuel Control
HO2S

HO2S Bank 2
Sen.2
(millivolts)
(Auto trans)

O2
Sensor
Data

Millivolts

200-700
changing slowly

250-650
changing slowly

General Description and
Operation, Fuel Metering
System

HO2S Bank 1
Sen.1
(ready/not
ready)

O2
Sensor
Data

Ready
Yes/No

Ready
Yes

Ready
Yes

General Description and
Operation, Fuel Control
HO2S; DTC: P0135

HO2S Bank 2
Sen.1
(ready/not
ready)

O2
Sensor
Data

Ready
Yes/No

Ready
Yes

Ready
Yes

General Description and
Operation, Fuel Control
HO2S

HO2S
Warm-Up Time
Bank 1 Sen.1

O2
Sensor
Data

Seconds

25-45

25-45

General Description and
Operation, Fuel Control
HO2S

HO2S
Warm-Up Time
Bank 1 Sen.2

O2
Sensor
Data

Seconds

60-100

60-100

General Description and
Operation, Fuel Control
HO2S

HO2S
Warm-Up Time
Bank 2 Sen.1

O2
Sensor
Data

Seconds

25-45

25-45

General Description and
Operation, Fuel Control
HO2S

HO2S
Warm-Up Time
Bank 2 Sen.2

O2
Sensor
Data

Seconds

60-100

60-100

General Description and
Operation, Catalyst
Monitor Heated Oxygen
Sensor (Auto Trans)

IAT (Intake Air
Temp)

Engine

Degrees C,
Degrees F

0-100

°

C,

depends on
underhood
temperature

0-80

°

C,

depends on
underhood
temperature

General Description and
Operation, Intake Air
Temperature (IAT) Sensor

Illumination
Switch

Engine

Closed 0V/Open
12V

Closed 0V

Closed 0V

Refer to Section 8

Ignition
Voltage

Engine

Volts

12.8-14.1

12.8-14.1

General Description and
Operation, Electronic
Ignition System

Inj. Pulse Bank
1

Engine

Milliseconds

2.0-4.0

2.5-4.0

General Description, Fuel
Metering, Fuel Injector

Inj. Pulse Bank
2

Engine

Milliseconds

2.0-4.0

2.5-4.0

General Description, Fuel
Metering, Fuel Injector

Knock Present

Engine

No/Yes

No

No

General Description and
ION Sensing Module

Knock Signal

Engine

Percent

1

∼

4

1

∼

4

General Description and
ION Sensing Module

Knock Sensor
Retard

Engine

°

CA

0

0

General Description and
ION Sensing Module

Knock Counter

Engine

Counts

—

—

General Description

Long Term FT
Bank 1 (Long
Term Fuel
Trim)

Misfire

Counts and
Percentage

100 to 150
counts, –22%
to +17%

100 to 150
counts, –22%
to +17%

Diagnosis, Fuel Trim
System Monitor; DTCs:
P0171, P0172

6E–85

TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Tech 2

Parameter

Refer To

Typical Data

Values

(2500 RPM)

Typical Data

Values (IDLE)

Units Displayed

Data List

Long Term FT
Bank 2 (Long
Term Fuel
Trim)

Misfire

Counts and
Percentage

100 to 150
counts, –22%
to +17%

100 to 150
counts, –22%
to +17%

Diagnosis, Fuel Trim
System Monitor; DTCs:
P0171

MAF (Mass Air
Flow)

Engine

Grams per
second

3.0-7.0

12-20

General Description and
Operation, MAF; DTCs:
P101, P0102, P0103

MAP kPa
(Manifold
Absolute

Engine

Kilopascals

25-35

20-30

General Description and
Operation, Manifold
Absolute Pressure (MAP)

Absolute
Pressure)

Volts

0.8-1.3

0.5-1.0

Absolute Pressure (MAP)
Sensor; DTCs: P0106,
P0107, P0108

MIL

Engine

On/Off

Off

Off

On-Board Diagnostic
System Check

Misfire Cur. Cyl
#1

Misfire

Counts

0-2

0-2

DTC P0300

Misfire Cur. Cyl
#2

Misfire

Counts

0-2

0-2

DTC P0300

Misfire Cur. Cyl
#3

Misfire

Counts

0-2

0-2

DTC P0300

Misfire Cur. Cyl
#4

Misfire

Counts

0-2

0-2

DTC P0300

Misfire Cur. Cyl
#5

Misfire

Counts

0-2

0-2

DTC P0300

Misfire Cur. Cyl
#6

Misfire

Counts

0-2

0-2

DTC P0300

Misfire Hist.
Cyl #1

Misfire

Counts

0

0

DTC P0300

Misfire Hist.
Cyl #2

Misfire

Counts

0

0

DTC P0300

Misfire Hist.
Cyl #3

Misfire

Counts

0

0

DTC P0300

Misfire Hist.
Cyl #4

Misfire

Counts

0

0

DTC P0300

Misfire Hist.
Cyl #5

Misfire

Counts

0

0

DTC P0300

Misfire Hist.
Cyl #6

Misfire

Counts

0

0

DTC P0300

Misfire Failures
Since First Fail

Misfire

Counts

0

0

DTC P0300

Misfire Passes
Since First Fail

Misfire

Counts

0

0

DTC P0300

PNP
(Park/Neutral
Position)

Engine

P-N /
R-D-3-2-L

P-N

P-N

4L30-E Automatic
Transmission Diagnosis

Power
Enrichment

Engine

NO/YES

NO

NO

General Description and
Operation, Acceleration
Mode

PSP Switch
(Power
Steering
Pressure)

Engine

Normal/Hi

Normal
Pressure

Normal
Pressure

Refer to 2A Section

6E–86

TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Tech 2

Parameter

Refer To

Typical Data

Values

(2500 RPM)

Typical Data

Values (IDLE)

Units Displayed

Data List

Spark
(Advance)

Engine

Degrees Before
Top Dead Center

15-22

34-44

General Description and
Operation, Electronic
Ignition System

Start-Up ECT
(Engine
Coolant Temp)

Engine

Degrees C,
Degrees F

Depends on
engine coolant
temperature at
time of start-up

Depends on
engine coolant
temperature at
time of start-up

General Description and
Operation, Engine
Coolant Temperature
(ECT) Sensor

Start-Up IAT
(Intake Air
Temp)

Engine

Degrees C,
Degrees F

Depends on
intake air
temperature at
time of start-up

Depends on
intake air
temperature at
time of start-up

General Description and
Operation, Intake Air
Temperature (IAT) Sensor

TCC Cruise
Brake Switch

Engine

Active/Inactive

Active

Active

Refer to Section 10

Total Misfire
Current Count

Misfire

Counts

0-5

0-5

DTC P0300

TP Sensor 1
(Throttle
Position
Sensor 1)

Engine

Percentage

6–12

12–16

General Description and
Operation, Throttle
Position (TP) Sensor

TP Sensor 2
(Throttle
Position
Sensor 2)

Engine

Percentage

88–94

86–90

General Description and
Operation, Throttle
Position (TP) Sensor

Throttle at Idle

Engine

No/Yes

Yes

No

General Description and
Operation, Throttle
Position (TP) Sensor

Upshift Lamp
(manual trans)

Engine

On/Off

Off

Off

Manual Transmission

Vehicle Speed

Engine

MPH / km/h

0

0

4L30-E Automatic
Transmission Diagnosis

Weak Cylinder

Misfire

Cylinder #

—

—

DTC P0300

6E–87

TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

No Malfunction Indicator Lamp (MIL)

D06R200083

Circuit Description

The “Check Engine” lamp (MIL) should always be
illuminated and steady with the ignition “ON” and the
engine stopped.  Ignition feed voltage is supplied to the
MIL bulb through the meter fuse.  The powertrain control
module (PCM) turns the MIL “ON” by grounding the MIL
driver circuit.

Diagnostic Aids

An intermittent MIL may be cased by a poor connection,
rubbed-through wire insulation, or a wire broken inside
the insulation.  Check for the following items:

D

Inspect the PCM harness and connections for
improper mating, broken locks, improperly formed or
damaged terminals, poor terminal-to-wire
connection, and damaged harness.

D

If the engine runs OK, check for a faulty light bulb, an
open in the MIL driver circuit, or an open in the
instrument cluster ignition feed.

D

If the engine cranks but will not run, check for an open
PCM ignition or battery feed, or a poor PCM to engine
ground.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. A “No MIL” condition accompanied by a no-start

condition suggests a faulty PCM ignition feed or
battery feed circuit.

9. Using a test light connected to B+, probe each of the

PCM ground terminals to ensure that a good ground
is present.  Refer to 

PCM Terminal End View for

terminal locations of the PCM ground circuits.

12.In this step, temporarily substitute a known good

relay for the PCM relay.  The horn relay is nearby,
and it can be verified as “good” simply by honking
the horn.  Replace the horn relay after completing
this step.

17.This vehicle is equipped with a PCM which utilizes

an electrically erasable programmable read only
memory (EEPROM).  When the PCM is replaced,
the new PCM must be programmed.  Refer to 

PCM

Replacement and Programming Procedures
Powertrain Control Module (PCM) and Sensors.